https://blog.rajpoot.dev/categories/python/ Recent content in Python on Manvendra Rajpoot https://blog.rajpoot.dev/img/personal/cover.png https://blog.rajpoot.dev/img/personal/cover.png Hugo en Manvendra Rajpoot Sun, 17 May 2026 17:50:46 +0530 https://blog.rajpoot.dev/cheatsheets/python/01-asyncio-essentials-cheatsheet/ Sun, 17 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/01-asyncio-essentials-cheatsheet/ asyncio essentials — event loop, tasks, gather, TaskGroup, timeouts. https://blog.rajpoot.dev/cheatsheets/integrations/01-full-stack-skeleton-cheatsheet/ Sat, 16 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/01-full-stack-skeleton-cheatsheet/ FastAPI + SQLAlchemy + Pydantic + Alembic project skeleton. https://blog.rajpoot.dev/cheatsheets/alembic/01-setup-cheatsheet/ Fri, 15 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/alembic/01-setup-cheatsheet/ Alembic setup cheatsheet — init, env.py for sync/async, target_metadata. https://blog.rajpoot.dev/cheatsheets/pydantic/01-basemodel-cheatsheet/ Thu, 14 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/01-basemodel-cheatsheet/ Pydantic v2 BaseModel cheatsheet — definition, validation, serialization. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/01-engine-pool-cheatsheet/ Tue, 12 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/01-engine-pool-cheatsheet/ SQLAlchemy 2.0 engine + connection cheatsheet — URLs, pooling, events, lifespan. https://blog.rajpoot.dev/textbooks/alembic/01-introduction-setup/ Sun, 10 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/textbooks/alembic/01-introduction-setup/ Chapter 1 — Alembic introduction: what it is, setup, env.py, naming conventions. https://blog.rajpoot.dev/textbooks/pydantic/01-introduction-and-mental-model/ Sat, 09 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/textbooks/pydantic/01-introduction-and-mental-model/ Chapter 1 — Pydantic v2 introduction: BaseModel, validation vs serialization, the v2 architecture. https://blog.rajpoot.dev/textbooks/sqlalchemy/01-introduction-core-vs-orm/ Thu, 07 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/01-introduction-core-vs-orm/ Chapter 1 — SQLAlchemy 2.0 fundamentals: the unified Core/ORM API, engine, connection, the 2.0 style query. https://blog.rajpoot.dev/cheatsheets/python/02-type-hints-cheatsheet/ Sun, 17 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/02-type-hints-cheatsheet/ Modern Python typing — PEP 604, PEP 695, generics, protocols, TypedDict. https://blog.rajpoot.dev/cheatsheets/integrations/02-request-lifecycle-cheatsheet/ Sat, 16 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/02-request-lifecycle-cheatsheet/ Full request lifecycle: FastAPI → Pydantic → SQLAlchemy → response. https://blog.rajpoot.dev/cheatsheets/alembic/02-commands-cheatsheet/ Fri, 15 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/alembic/02-commands-cheatsheet/ Alembic CLI commands cheatsheet — revision, upgrade, downgrade, stamp, history. https://blog.rajpoot.dev/cheatsheets/pydantic/02-fields-constraints-cheatsheet/ Thu, 14 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/02-fields-constraints-cheatsheet/ Pydantic v2 Field cheatsheet — defaults, constraints, descriptions, aliases. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/02-schema-types-cheatsheet/ Tue, 12 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/02-schema-types-cheatsheet/ SQLAlchemy 2.0 schema cheatsheet — Mapped, mapped_column, types, defaults, indexes, constraints. https://blog.rajpoot.dev/textbooks/alembic/02-autogenerate/ Sun, 10 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/textbooks/alembic/02-autogenerate/ Chapter 2 — Alembic autogenerate: what it detects, what it misses, review checklist. https://blog.rajpoot.dev/textbooks/pydantic/02-fields-types-constraints/ Sat, 09 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/textbooks/pydantic/02-fields-types-constraints/ Chapter 2 — Pydantic v2 fields, types, constraints, defaults, aliases. https://blog.rajpoot.dev/textbooks/sqlalchemy/02-engine-pooling-connections/ Thu, 07 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/02-engine-pooling-connections/ Chapter 2 — SQLAlchemy engine internals: pooling strategies, connection lifecycle, events, dialects. https://blog.rajpoot.dev/cheatsheets/python/03-dataclasses-attrs-cheatsheet/ Sun, 17 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/03-dataclasses-attrs-cheatsheet/ Python dataclasses vs attrs — when each fits, frozen, slots, post_init. https://blog.rajpoot.dev/cheatsheets/integrations/03-pydantic-sqlalchemy-mapping-cheatsheet/ Sat, 16 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/03-pydantic-sqlalchemy-mapping-cheatsheet/ Map Pydantic schemas to SQLAlchemy models — Read/Create/Update, from_attributes. https://blog.rajpoot.dev/cheatsheets/alembic/03-autogenerate-cheatsheet/ Fri, 15 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/alembic/03-autogenerate-cheatsheet/ Alembic autogenerate cheatsheet — what it detects, what it misses, how to fix. https://blog.rajpoot.dev/cheatsheets/pydantic/03-validators-cheatsheet/ Thu, 14 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/03-validators-cheatsheet/ Pydantic v2 validators — field_validator, model_validator, before/after, Annotated validators. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/03-session-cheatsheet/ Tue, 12 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/03-session-cheatsheet/ SQLAlchemy 2.0 session cheatsheet — session lifecycle, flush vs commit, identity map, expire. https://blog.rajpoot.dev/textbooks/alembic/03-writing-manually/ Sun, 10 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/textbooks/alembic/03-writing-manually/ Chapter 3 — Manual Alembic migrations: op API, batch_alter_table, raw SQL, data migrations. https://blog.rajpoot.dev/textbooks/pydantic/03-validators/ Sat, 09 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/textbooks/pydantic/03-validators/ Chapter 3 — Pydantic v2 validators: field_validator, model_validator, before/after, BeforeValidator/AfterValidator. https://blog.rajpoot.dev/textbooks/sqlalchemy/03-schema-and-types/ Thu, 07 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/03-schema-and-types/ Chapter 3 — SQLAlchemy schema definition: Mapped, mapped_column, types, defaults, indexes, constraints. https://blog.rajpoot.dev/cheatsheets/python/04-decorators-context-managers-cheatsheet/ Sun, 17 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/04-decorators-context-managers-cheatsheet/ Python decorators and context managers — sync, async, contextlib. https://blog.rajpoot.dev/cheatsheets/integrations/04-alembic-fastapi-workflow-cheatsheet/ Sat, 16 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/04-alembic-fastapi-workflow-cheatsheet/ Daily workflow: edit model → generate migration → apply → restart FastAPI. https://blog.rajpoot.dev/cheatsheets/alembic/04-op-api-cheatsheet/ Fri, 15 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/alembic/04-op-api-cheatsheet/ Alembic op API cheatsheet — every operation, with examples. https://blog.rajpoot.dev/cheatsheets/pydantic/04-serialization-cheatsheet/ Thu, 14 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/04-serialization-cheatsheet/ Pydantic v2 serialization — model_dump, custom serializers, mode. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/04-select-queries-cheatsheet/ Tue, 12 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/04-select-queries-cheatsheet/ SQLAlchemy 2.0 select() cheatsheet — filters, joins, aggregates, CTEs, subqueries. https://blog.rajpoot.dev/textbooks/alembic/04-branching-merging/ Sun, 10 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/textbooks/alembic/04-branching-merging/ Chapter 4 — Alembic branches: when they happen, how to merge, and avoiding multiple heads. https://blog.rajpoot.dev/textbooks/pydantic/04-serialization/ Sat, 09 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/textbooks/pydantic/04-serialization/ Chapter 4 — Pydantic v2 serialization: model_dump, model_dump_json, custom serializers, exclude, mode. https://blog.rajpoot.dev/textbooks/sqlalchemy/04-session-and-unit-of-work/ Thu, 07 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/04-session-and-unit-of-work/ Chapter 4 — Sessions in SQLAlchemy 2.0: lifecycle, identity map, flush vs commit, expire, and the unit of work pattern. https://blog.rajpoot.dev/cheatsheets/python/05-iterators-generators-cheatsheet/ Sun, 17 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/05-iterators-generators-cheatsheet/ Python iteration patterns — generators, comprehensions, itertools. https://blog.rajpoot.dev/cheatsheets/integrations/05-auth-stack-cheatsheet/ Sat, 16 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/05-auth-stack-cheatsheet/ End-to-end auth across FastAPI / SQLAlchemy / Pydantic. https://blog.rajpoot.dev/cheatsheets/alembic/05-online-schema-changes-cheatsheet/ Fri, 15 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/alembic/05-online-schema-changes-cheatsheet/ Zero-downtime migration patterns — expand-contract, CONCURRENTLY, NOT VALID FK, batched backfill. https://blog.rajpoot.dev/cheatsheets/pydantic/05-discriminated-unions-cheatsheet/ Thu, 14 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/05-discriminated-unions-cheatsheet/ Pydantic v2 discriminated unions, generic models, recursion. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/05-relationships-cheatsheet/ Tue, 12 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/05-relationships-cheatsheet/ SQLAlchemy relationships cheatsheet — 1:N, M:N, 1:1, loading strategies, cascade. https://blog.rajpoot.dev/textbooks/alembic/05-online-schema-changes/ Sun, 10 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/textbooks/alembic/05-online-schema-changes/ Chapter 5 — Online schema changes via Alembic: expand-contract, batched backfills, concurrent indexes, big-table patterns. https://blog.rajpoot.dev/textbooks/pydantic/05-nested-generics-unions/ Sat, 09 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/textbooks/pydantic/05-nested-generics-unions/ Chapter 5 — Pydantic v2: nested models, generic models, discriminated unions. https://blog.rajpoot.dev/textbooks/sqlalchemy/05-querying-with-select/ Thu, 07 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/05-querying-with-select/ Chapter 5 — Querying SQLAlchemy: select(), filtering, joins, aggregations, subqueries, CTEs, and the result API. https://blog.rajpoot.dev/cheatsheets/python/06-uv-packaging-cheatsheet/ Sun, 17 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/06-uv-packaging-cheatsheet/ uv cheatsheet — projects, dependencies, lockfile, build, publish. https://blog.rajpoot.dev/cheatsheets/integrations/06-multitenancy-stack-cheatsheet/ Sat, 16 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/06-multitenancy-stack-cheatsheet/ End-to-end multi-tenancy: FastAPI middleware + SQLAlchemy + Postgres RLS. https://blog.rajpoot.dev/cheatsheets/alembic/06-branching-merging-cheatsheet/ Fri, 15 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/alembic/06-branching-merging-cheatsheet/ Alembic branching cheatsheet — multi-head detection, merging, avoiding branches. https://blog.rajpoot.dev/cheatsheets/pydantic/06-custom-types-cheatsheet/ Thu, 14 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/06-custom-types-cheatsheet/ Pydantic v2 custom types, TypeAdapter, dataclass integration. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/06-transactions-concurrency-cheatsheet/ Tue, 12 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/06-transactions-concurrency-cheatsheet/ SQLAlchemy 2.0 transactions cheatsheet — isolation, savepoints, FOR UPDATE, optimistic locking. https://blog.rajpoot.dev/textbooks/alembic/06-multi-database/ Sun, 10 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/textbooks/alembic/06-multi-database/ Chapter 6 — Alembic with multiple databases or schema-per-tenant: env.py setup, migration strategies. https://blog.rajpoot.dev/textbooks/pydantic/06-custom-types-typeadapter/ Sat, 09 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/textbooks/pydantic/06-custom-types-typeadapter/ Chapter 6 — Pydantic v2 custom types, RootModel, TypeAdapter, dataclass integration. https://blog.rajpoot.dev/textbooks/sqlalchemy/06-relationships/ Thu, 07 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/06-relationships/ Chapter 6 — Relationships in SQLAlchemy 2.0: one-to-many, many-to-many, lazy / eager loading, joinedload, selectinload. https://blog.rajpoot.dev/cheatsheets/python/07-pytest-cheatsheet/ Sun, 17 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/07-pytest-cheatsheet/ pytest cheatsheet — fixtures, parametrize, marks, plugins, async. https://blog.rajpoot.dev/cheatsheets/integrations/07-background-jobs-integration-cheatsheet/ Sat, 16 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/07-background-jobs-integration-cheatsheet/ Background jobs across FastAPI / SQLAlchemy / ARQ — DB context, outbox pattern. https://blog.rajpoot.dev/cheatsheets/alembic/07-multi-db-cheatsheet/ Fri, 15 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/alembic/07-multi-db-cheatsheet/ Alembic with multiple databases or per-tenant schemas. https://blog.rajpoot.dev/cheatsheets/pydantic/07-strict-lax-cheatsheet/ Thu, 14 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/07-strict-lax-cheatsheet/ Pydantic v2 strict / lax mode — coercion rules, per-field strict, per-call strict. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/07-async-patterns-cheatsheet/ Tue, 12 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/07-async-patterns-cheatsheet/ SQLAlchemy 2.0 async cheatsheet — AsyncSession, streaming, awaitable_attrs, run_sync. https://blog.rajpoot.dev/textbooks/alembic/07-ci-integration/ Sun, 10 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/textbooks/alembic/07-ci-integration/ Chapter 7 — Alembic in CI: drift detection, up/down round-trip, dry-run, deploy gates. https://blog.rajpoot.dev/textbooks/pydantic/07-strict-mode-coercion/ Sat, 09 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/textbooks/pydantic/07-strict-mode-coercion/ Chapter 7 — Pydantic v2 strict mode, lax mode, per-field strict types, and coercion rules. https://blog.rajpoot.dev/textbooks/sqlalchemy/07-transactions-concurrency/ Thu, 07 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/07-transactions-concurrency/ Chapter 7 — Transactions and concurrency in SQLAlchemy: isolation levels, savepoints, with_for_update, optimistic locking, deadlock retry. https://blog.rajpoot.dev/cheatsheets/python/08-structlog-cheatsheet/ Sun, 17 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/08-structlog-cheatsheet/ structlog cheatsheet — structured logging, contextvars, processors. https://blog.rajpoot.dev/cheatsheets/integrations/08-testing-stack-cheatsheet/ Sat, 16 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/08-testing-stack-cheatsheet/ Test the FastAPI + SQLA + Pydantic + Alembic stack end-to-end. https://blog.rajpoot.dev/cheatsheets/alembic/08-ci-integration-cheatsheet/ Fri, 15 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/alembic/08-ci-integration-cheatsheet/ Alembic in CI — drift detection, round-trip tests, single-head gate. https://blog.rajpoot.dev/cheatsheets/pydantic/08-aliases-cheatsheet/ Thu, 14 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/08-aliases-cheatsheet/ Pydantic v2 aliases — alias, validation_alias, serialization_alias, AliasChoices, AliasPath. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/08-performance-cheatsheet/ Tue, 12 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/08-performance-cheatsheet/ SQLAlchemy 2.0 performance cheatsheet — N+1 prevention, bulk ops, server-side cursors, query analysis. https://blog.rajpoot.dev/textbooks/alembic/08-production-recovery/ Sun, 10 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/textbooks/alembic/08-production-recovery/ Chapter 8 — Alembic production patterns: deploy strategies, rollback, recovery from broken migrations. https://blog.rajpoot.dev/textbooks/pydantic/08-json-schema/ Sat, 09 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/textbooks/pydantic/08-json-schema/ Chapter 8 — Pydantic v2 JSON Schema generation, OpenAPI integration, custom schemas. https://blog.rajpoot.dev/textbooks/sqlalchemy/08-async-deep-dive/ Thu, 07 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/08-async-deep-dive/ Chapter 8 — Async SQLAlchemy 2.0: AsyncEngine, AsyncSession, async streaming, lazy loading caveats, and FastAPI integration. https://blog.rajpoot.dev/cheatsheets/python/09-profiling-cheatsheet/ Sun, 17 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/09-profiling-cheatsheet/ Python profiling cheatsheet — cProfile, py-spy, scalene, memory profiling. https://blog.rajpoot.dev/cheatsheets/integrations/09-deployment-stack-cheatsheet/ Sat, 16 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/09-deployment-stack-cheatsheet/ Deploy FastAPI + SQLAlchemy + Alembic to K8s — Dockerfile, Helm Job, lifecycle. https://blog.rajpoot.dev/cheatsheets/alembic/09-production-cheatsheet/ Fri, 15 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/alembic/09-production-cheatsheet/ Alembic production patterns — deploy strategies, recovery, stamp, downgrade discipline. https://blog.rajpoot.dev/cheatsheets/pydantic/09-settings-cheatsheet/ Thu, 14 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/09-settings-cheatsheet/ pydantic-settings cheatsheet — env vars, .env, secrets, layered config. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/09-migrations-integration-cheatsheet/ Tue, 12 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/09-migrations-integration-cheatsheet/ SQLAlchemy + Alembic integration cheatsheet — env.py, autogenerate, naming conventions. https://blog.rajpoot.dev/textbooks/pydantic/09-settings/ Sat, 09 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/textbooks/pydantic/09-settings/ Chapter 9 — pydantic-settings: env vars, .env files, secrets, layered config, CLI integration. https://blog.rajpoot.dev/textbooks/sqlalchemy/09-performance/ Thu, 07 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/09-performance/ Chapter 9 — SQLAlchemy performance: N+1 prevention, bulk inserts, streaming, indexes, query analysis. https://blog.rajpoot.dev/cheatsheets/python/10-pathlib-cheatsheet/ Sun, 17 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/10-pathlib-cheatsheet/ pathlib cheatsheet — file paths the modern way. https://blog.rajpoot.dev/cheatsheets/integrations/10-observability-stack-cheatsheet/ Sat, 16 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/integrations/10-observability-stack-cheatsheet/ End-to-end observability for FastAPI + SQLAlchemy. https://blog.rajpoot.dev/cheatsheets/alembic/10-recipes-cheatsheet/ Fri, 15 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/alembic/10-recipes-cheatsheet/ Alembic recipes — common migration patterns: indexes, FKs, enum, JSONB, partitioning. https://blog.rajpoot.dev/cheatsheets/pydantic/10-json-schema-cheatsheet/ Thu, 14 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/10-json-schema-cheatsheet/ Pydantic v2 JSON Schema generation — model_json_schema, OpenAPI, LLM tool calling. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/10-production-cheatsheet/ Tue, 12 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/10-production-cheatsheet/ SQLAlchemy 2.0 production cheatsheet — PgBouncer, read replicas, OTEL, multi-tenancy. https://blog.rajpoot.dev/textbooks/pydantic/10-performance-and-alternatives/ Sat, 09 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/textbooks/pydantic/10-performance-and-alternatives/ Chapter 10 — Pydantic performance, FastAPI integration patterns, and alternatives (msgspec, attrs). https://blog.rajpoot.dev/textbooks/sqlalchemy/10-migrations/ Thu, 07 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/10-migrations/ Chapter 10 — Schema migrations with SQLAlchemy and Alembic: integration patterns, autogenerate, branching, online schema changes. https://blog.rajpoot.dev/cheatsheets/python/11-datetime-cheatsheet/ Sun, 17 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/11-datetime-cheatsheet/ Python datetime cheatsheet — timezones, parsing, formatting, arithmetic. https://blog.rajpoot.dev/cheatsheets/pydantic/11-performance-cheatsheet/ Thu, 14 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/11-performance-cheatsheet/ Pydantic v2 performance tips — schema caching, TypeAdapter, validation speed, msgspec comparison. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/11-events-hooks-cheatsheet/ Tue, 12 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/11-events-hooks-cheatsheet/ SQLAlchemy 2.0 events cheatsheet — engine, session, mapper, attribute events. https://blog.rajpoot.dev/textbooks/sqlalchemy/11-testing/ Thu, 07 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/11-testing/ Chapter 11 — Testing SQLAlchemy: per-test transactions, testcontainers, factories, and async test fixtures. https://blog.rajpoot.dev/cheatsheets/python/12-stdlib-highlights-cheatsheet/ Sun, 17 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/12-stdlib-highlights-cheatsheet/ Python stdlib highlights — collections, json, os, sys, subprocess. https://blog.rajpoot.dev/cheatsheets/pydantic/12-errors-cheatsheet/ Thu, 14 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/12-errors-cheatsheet/ Pydantic v2 ValidationError — structure, formatting, custom error envelopes. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/12-repository-pattern-cheatsheet/ Tue, 12 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/12-repository-pattern-cheatsheet/ SQLAlchemy repository pattern cheatsheet — separation of concerns, testability, generic repos. https://blog.rajpoot.dev/textbooks/sqlalchemy/12-production-patterns/ Thu, 07 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/textbooks/sqlalchemy/12-production-patterns/ Chapter 12 — Production SQLAlchemy: connection pooling, read replicas, observability, multi-tenancy, and operational patterns. https://blog.rajpoot.dev/cheatsheets/python/13-httpx-cheatsheet/ Sun, 17 May 2026 08:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/13-httpx-cheatsheet/ httpx cheatsheet — modern HTTP client with sync and async APIs. https://blog.rajpoot.dev/cheatsheets/pydantic/13-orm-mode-cheatsheet/ Thu, 14 May 2026 08:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/13-orm-mode-cheatsheet/ Pydantic v2 from_attributes — converting SQLAlchemy / attrs / dataclass instances. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/13-soft-delete-audit-cheatsheet/ Tue, 12 May 2026 08:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/13-soft-delete-audit-cheatsheet/ SQLAlchemy soft-delete and audit cheatsheet — mixins, event hooks, query filters. https://blog.rajpoot.dev/cheatsheets/python/14-cli-cheatsheet/ Sun, 17 May 2026 08:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/14-cli-cheatsheet/ Python CLI cheatsheet — Typer, Click, argparse. https://blog.rajpoot.dev/cheatsheets/pydantic/14-fastapi-patterns-cheatsheet/ Thu, 14 May 2026 08:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/14-fastapi-patterns-cheatsheet/ Pydantic + FastAPI common patterns — request/response models, partial updates, query class. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/14-multitenancy-cheatsheet/ Tue, 12 May 2026 08:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/14-multitenancy-cheatsheet/ SQLAlchemy multi-tenancy cheatsheet — tenant column, schema-per-tenant, DB-per-tenant. https://blog.rajpoot.dev/cheatsheets/python/15-logging-cheatsheet/ Sun, 17 May 2026 08:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/15-logging-cheatsheet/ Python stdlib logging — setup, handlers, formatters, JSON output. https://blog.rajpoot.dev/cheatsheets/pydantic/15-recursive-models-cheatsheet/ Thu, 14 May 2026 08:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/15-recursive-models-cheatsheet/ Pydantic v2 recursive models, forward refs, mutually-recursive models. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/15-common-pitfalls-cheatsheet/ Tue, 12 May 2026 08:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/15-common-pitfalls-cheatsheet/ SQLAlchemy 2.0 common pitfalls cheatsheet — the bugs you'll hit and how to fix them. https://blog.rajpoot.dev/cheatsheets/python/16-sets-dicts-cheatsheet/ Sun, 17 May 2026 08:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/16-sets-dicts-cheatsheet/ Python sets and dicts cheatsheet — operations, comprehensions, common patterns. https://blog.rajpoot.dev/cheatsheets/pydantic/16-computed-fields-cheatsheet/ Thu, 14 May 2026 08:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/16-computed-fields-cheatsheet/ Pydantic v2 computed_field — derived attributes in output. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/16-type-annotations-cheatsheet/ Tue, 12 May 2026 08:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/16-type-annotations-cheatsheet/ SQLAlchemy 2.0 type-annotation cheatsheet — Mapped, mapped_column, type_annotation_map, custom types. https://blog.rajpoot.dev/cheatsheets/python/17-strings-encoding-cheatsheet/ Sun, 17 May 2026 08:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/17-strings-encoding-cheatsheet/ Python strings cheatsheet — f-strings, encoding, slicing, common methods. https://blog.rajpoot.dev/cheatsheets/pydantic/17-dataclass-cheatsheet/ Thu, 14 May 2026 08:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/17-dataclass-cheatsheet/ Pydantic v2 dataclass integration — when to use, when to skip. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/17-inheritance-cheatsheet/ Tue, 12 May 2026 08:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/17-inheritance-cheatsheet/ SQLAlchemy 2.0 inheritance cheatsheet — single-table, joined-table, concrete inheritance, polymorphic queries. https://blog.rajpoot.dev/cheatsheets/python/18-exceptions-cheatsheet/ Sun, 17 May 2026 08:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/18-exceptions-cheatsheet/ Python exception handling — try/except/finally, ExceptionGroup, custom exceptions. https://blog.rajpoot.dev/cheatsheets/pydantic/18-common-domain-types-cheatsheet/ Thu, 14 May 2026 08:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/18-common-domain-types-cheatsheet/ Pydantic v2 common domain types — IDs, money, phone numbers, dates, URLs. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/18-hybrid-computed-cheatsheet/ Tue, 12 May 2026 08:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/18-hybrid-computed-cheatsheet/ SQLAlchemy 2.0 hybrid_property / computed_column / column_property cheatsheet. https://blog.rajpoot.dev/cheatsheets/python/19-testing-patterns-cheatsheet/ Sun, 17 May 2026 09:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/19-testing-patterns-cheatsheet/ Advanced Python testing — mock, snapshot, property-based, factory. https://blog.rajpoot.dev/cheatsheets/pydantic/19-testing-cheatsheet/ Thu, 14 May 2026 09:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/19-testing-cheatsheet/ Pydantic testing patterns — parametrized validation tests, factories, error matching. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/19-change-feeds-cheatsheet/ Tue, 12 May 2026 09:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/19-change-feeds-cheatsheet/ SQLAlchemy change-feed cheatsheet — outbox pattern, CDC, logical replication, SKIP LOCKED workers. https://blog.rajpoot.dev/cheatsheets/python/20-project-setup-cheatsheet/ Sun, 17 May 2026 09:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/python/20-project-setup-cheatsheet/ Modern Python project setup — uv, ruff, mypy, pytest, pyproject.toml. https://blog.rajpoot.dev/cheatsheets/pydantic/20-migration-v1-v2-cheatsheet/ Thu, 14 May 2026 09:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/pydantic/20-migration-v1-v2-cheatsheet/ Pydantic v1 → v2 migration cheatsheet — renames, API differences, gotchas. https://blog.rajpoot.dev/cheatsheets/sqlalchemy/20-recipes-cheatsheet/ Tue, 12 May 2026 09:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/sqlalchemy/20-recipes-cheatsheet/ SQLAlchemy 2.0 recipes — cursor pagination, dynamic filtering, sort builders, bulk upsert. https://blog.rajpoot.dev/posts/python/python-data-pipelines-2026/ Tue, 05 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/posts/python/python-data-pipelines-2026/ Python data pipelines in 2026 — Polars, DuckDB, Ibis, and the stack that's faster than pandas without leaving Python. https://blog.rajpoot.dev/posts/python/python-3-13-features-2026/ Mon, 04 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/posts/python/python-3-13-features-2026/ Python 3.13 in 2026 — free-threaded mode, JIT, REPL improvements, and what's actually useful in production. https://blog.rajpoot.dev/posts/python/uv-deep-dive-2026/ Mon, 04 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/posts/python/uv-deep-dive-2026/ uv in 2026 — full-feature Python tooling, performance, project workflow, lockfiles, scripts, and migration from poetry / pip. https://blog.rajpoot.dev/posts/python/python-profiling-2026/ Sun, 03 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/posts/python/python-profiling-2026/ Python profiling in 2026 — py-spy for production sampling, scalene for CPU+GPU+memory, memray for memory, and the workflow for finding hot spots. https://blog.rajpoot.dev/posts/python/python-logging-2026/ Sat, 02 May 2026 11:50:00 +0530 https://blog.rajpoot.dev/posts/python/python-logging-2026/ Python logging done right in 2026 — structlog, JSON output, contextvars, correlation IDs, and the patterns from production apps. https://blog.rajpoot.dev/posts/python/python-packaging-2026/ Sat, 02 May 2026 10:40:00 +0530 https://blog.rajpoot.dev/posts/python/python-packaging-2026/ Modern Python packaging in 2026 — uv, hatch, pyproject.toml standards, building wheels, publishing to PyPI, and the workflow that doesn't fight you. https://blog.rajpoot.dev/posts/python/python-async-patterns-2026/ Sat, 02 May 2026 09:10:00 +0530 https://blog.rajpoot.dev/posts/python/python-async-patterns-2026/ Modern Python async patterns in 2026 — TaskGroup, asyncio.timeout, structured concurrency, anyio, and the patterns that don't leak tasks. https://blog.rajpoot.dev/posts/python/python-data-validation-2026/ Fri, 01 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/posts/python/python-data-validation-2026/ Python data validation in 2026 — Pydantic v2 vs msgspec vs attrs. Performance, ergonomics, and which fits where. https://blog.rajpoot.dev/posts/python/fastapi-background-tasks-vs-arq-2026/ Fri, 01 May 2026 05:00:00 +0530 https://blog.rajpoot.dev/posts/python/fastapi-background-tasks-vs-arq-2026/ When to use FastAPI BackgroundTasks vs a real job queue (arq, Dramatiq, Celery) in 2026 — limits, patterns, and the production rules. https://blog.rajpoot.dev/posts/python/fastapi-dependency-injection-2026/ Fri, 01 May 2026 03:40:00 +0530 https://blog.rajpoot.dev/posts/python/fastapi-dependency-injection-2026/ FastAPI dependency injection patterns for production in 2026 — typed deps, request context, lifespan resources, and the patterns that scale past one file. https://blog.rajpoot.dev/posts/python/python-uv-cookbook-2026/ Fri, 01 May 2026 01:20:00 +0530 https://blog.rajpoot.dev/posts/python/python-uv-cookbook-2026/ Practical uv recipes for Python in 2026 — workspaces, scripts, lockfiles, Docker, CI, and the patterns that replace pip/poetry/pyenv at once. https://blog.rajpoot.dev/posts/python/python-async-database-drivers-2026/ Thu, 30 Apr 2026 23:50:00 +0530 https://blog.rajpoot.dev/posts/python/python-async-database-drivers-2026/ Async Python database drivers in 2026 — asyncpg vs psycopg async, MySQL options, SQLite (aiosqlite), and which to pick by use case. https://blog.rajpoot.dev/posts/python/python-asyncio-debugging-2026/ Thu, 30 Apr 2026 22:30:00 +0530 https://blog.rajpoot.dev/posts/python/python-asyncio-debugging-2026/ Debugging asyncio in production Python in 2026 — task leaks, blocking calls, slow callbacks, and the diagnostics that actually find them. https://blog.rajpoot.dev/posts/python/python-fastapi-websockets-realtime-2026/ Thu, 30 Apr 2026 21:40:00 +0530 https://blog.rajpoot.dev/posts/python/python-fastapi-websockets-realtime-2026/ Building real-time features with FastAPI WebSockets in 2026 — connection management, auth, broadcast patterns, scaling, and production gotchas. https://blog.rajpoot.dev/posts/python/python-fastapi-testing-strategies-2026/ Thu, 30 Apr 2026 19:20:00 +0530 https://blog.rajpoot.dev/posts/python/python-fastapi-testing-strategies-2026/ Testing strategies for FastAPI apps in 2026 — unit, integration, contract, end-to-end, with real DB and async-aware patterns. https://blog.rajpoot.dev/posts/python/python-3-13-features-developers-2026/ Thu, 30 Apr 2026 18:40:00 +0530 https://blog.rajpoot.dev/posts/python/python-3-13-features-developers-2026/ Python 3.13 features for backend developers in 2026 — experimental JIT, free-threaded (no GIL) builds, REPL improvements, and what they mean for production. https://blog.rajpoot.dev/posts/python/sqlalchemy-2-deep-patterns-2026/ Thu, 30 Apr 2026 15:50:00 +0530 https://blog.rajpoot.dev/posts/python/sqlalchemy-2-deep-patterns-2026/ SQLAlchemy 2.0 production patterns in 2026 — Mapped types, async, sessions, hybrid properties, batching, and the patterns that scale. https://blog.rajpoot.dev/posts/python/django-ninja-vs-djangorest-fastapi-2026/ Thu, 30 Apr 2026 15:40:00 +0530 https://blog.rajpoot.dev/posts/python/django-ninja-vs-djangorest-fastapi-2026/ Django Ninja vs Django REST Framework vs FastAPI in 2026 — type safety, async support, performance, and how to pick by team and project. https://blog.rajpoot.dev/posts/python/python-type-hints-2026-pep-695-pep-705/ Thu, 30 Apr 2026 11:20:00 +0530 https://blog.rajpoot.dev/posts/python/python-type-hints-2026-pep-695-pep-705/ Modern Python type hints in 2026 — PEP 695 generics, PEP 705 ReadOnly, TypedDict, Protocol, NewType, and the patterns that survive code review. https://blog.rajpoot.dev/posts/python/pydantic-v2-deep-dive-2026/ Thu, 30 Apr 2026 11:00:00 +0530 https://blog.rajpoot.dev/posts/python/pydantic-v2-deep-dive-2026/ A deep dive into Pydantic v2 — model design, validators, serializers, settings, performance, and the patterns that make it the typed-data backbone of modern Python. https://blog.rajpoot.dev/posts/python/polars-pandas-data-engineering-2026/ Thu, 30 Apr 2026 09:30:00 +0530 https://blog.rajpoot.dev/posts/python/polars-pandas-data-engineering-2026/ Why Polars replaces Pandas for production data engineering in 2026 — lazy execution, Arrow-native columnar engine, the API differences, and migration tips. https://blog.rajpoot.dev/posts/python/background-jobs-python-arq-dramatiq-taskiq-2026/ Wed, 29 Apr 2026 10:40:00 +0530 https://blog.rajpoot.dev/posts/python/background-jobs-python-arq-dramatiq-taskiq-2026/ Modern Python background job systems compared — arq, Dramatiq, Taskiq, and where Celery still earns its keep. Patterns, retries, scheduling, and how to pick. https://blog.rajpoot.dev/posts/python/asyncio-patterns-taskgroup-anyio-2026/ Tue, 28 Apr 2026 21:10:00 +0530 https://blog.rajpoot.dev/posts/python/asyncio-patterns-taskgroup-anyio-2026/ Modern asyncio patterns in Python 3.11+ — TaskGroup, structured concurrency, exception groups, anyio for portable async, and the patterns that survived the asyncio API churn. https://blog.rajpoot.dev/posts/python/modern-python-tooling-uv-ruff-2026/ Tue, 28 Apr 2026 18:30:00 +0530 https://blog.rajpoot.dev/posts/python/modern-python-tooling-uv-ruff-2026/ The modern Python toolchain has converged in 2026 — uv for packaging, Ruff for lint+format, ty for type-checking. A practical setup that's 10–100× faster than what you used in 2023. https://blog.rajpoot.dev/posts/python/celery-background-tasks-explained/ Tue, 28 Apr 2026 14:55:00 +0530 https://blog.rajpoot.dev/posts/python/celery-background-tasks-explained/ How to use Celery properly — brokers, workers, retries, idempotency, scheduling, and the patterns that don't bite you in production. https://blog.rajpoot.dev/posts/python/flask-quickstart-and-when-to-pick-it/ Tue, 28 Apr 2026 14:50:00 +0530 https://blog.rajpoot.dev/posts/python/flask-quickstart-and-when-to-pick-it/ A pragmatic Flask tutorial — set up a real app, blueprints, extensions, blueprints, and an honest take on when to still pick Flask in 2026 vs. FastAPI or Django. https://blog.rajpoot.dev/posts/devops/docker-for-python-developers/ Tue, 28 Apr 2026 14:10:00 +0530 https://blog.rajpoot.dev/posts/devops/docker-for-python-developers/ A no-fluff Docker guide for Python developers — Dockerfiles that aren't 2GB, multi-stage builds, docker-compose for local dev, and the patterns that actually scale. https://blog.rajpoot.dev/posts/python/python-decorators-explained/ Tue, 28 Apr 2026 13:20:00 +0530 https://blog.rajpoot.dev/posts/python/python-decorators-explained/ Python decorators demystified — what they actually are, how to write your own, and the patterns you'll see in real codebases. https://blog.rajpoot.dev/posts/python/async-await-explained/ Tue, 28 Apr 2026 13:10:00 +0530 https://blog.rajpoot.dev/posts/python/async-await-explained/ The mental model that makes Python's async/await actually click — what it is, what it isn't, when to use it, and the mistakes that quietly ruin async code. https://blog.rajpoot.dev/posts/python/python-virtual-environments/ Tue, 28 Apr 2026 13:00:00 +0530 https://blog.rajpoot.dev/posts/python/python-virtual-environments/ A practical comparison of uv, venv, and Poetry — what each one is great at, when to pick which, and how the Python packaging story actually works in 2026. https://blog.rajpoot.dev/posts/python/modern-python-tips/ Tue, 28 Apr 2026 12:00:00 +0530 https://blog.rajpoot.dev/posts/python/modern-python-tips/ Practical, modern Python tips drawn from real-world projects — type hints, dataclasses, pathlib, comprehensions, the walrus operator, and more. https://blog.rajpoot.dev/posts/fastapi/getting-started-with-fastapi/ Tue, 28 Apr 2026 11:00:00 +0530 https://blog.rajpoot.dev/posts/fastapi/getting-started-with-fastapi/ A practical introduction to FastAPI — the async Python framework that gives you type-safe APIs, automatic docs, and great performance with very little ceremony.