connect to a PostgreSQL database running in Docker
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commit
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POSTGRES_DB = db
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DB_HOST = localhost
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DB_PORT = 5433
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POSTGRES_USER = dbusername
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POSTGRES_PASSWORD = dbpassword
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db-data/
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# Byte-compiled / optimized / DLL files
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# mkdocs documentation
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# mypy
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# option (not recommended) you can uncomment the following to ignore the entire idea folder.
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#.idea/
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@ -0,0 +1,26 @@
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services:
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postgres:
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container_name: postgres
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image: postgres:latest
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ports:
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- 5433:5432
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volumes:
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- ./db-data:/var/lib/postgresql/data
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# environment:
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# POSTGRES_DB: "db"
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# POSTGRES_PASSWORD: "dbpass"
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# POSTGRES_USER: "dbuser"
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env_file:
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- .env
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healthcheck:
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test: pg_isready -U hello-postgres -h 127.0.0.1
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interval: 5s
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# networks:
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# - db-net
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# volumes:
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# data:
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# name: hello-postgres
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# networks:
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# db-net:
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# name: db-net
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# This file is @generated by PDM.
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# It is not intended for manual editing.
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[metadata]
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groups = ["default"]
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strategy = ["cross_platform", "inherit_metadata"]
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lock_version = "4.4.1"
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content_hash = "sha256:dec8a1404247926935fc662d04cb4195826a325ab9e8ff1461512f80878f104d"
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[[package]]
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name = "psycopg2-binary"
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version = "2.9.9"
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requires_python = ">=3.7"
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summary = "psycopg2 - Python-PostgreSQL Database Adapter"
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groups = ["default"]
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files = [
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{file = "psycopg2-binary-2.9.9.tar.gz", hash = "sha256:7f01846810177d829c7692f1f5ada8096762d9172af1b1a28d4ab5b77c923c1c"},
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{file = "psycopg2_binary-2.9.9-cp312-cp312-macosx_10_9_x86_64.whl", hash = "sha256:8532fd6e6e2dc57bcb3bc90b079c60de896d2128c5d9d6f24a63875a95a088cf"},
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{file = "psycopg2_binary-2.9.9-cp312-cp312-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:2e5afae772c00980525f6d6ecf7cbca55676296b580c0e6abb407f15f3706996"},
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{file = "psycopg2_binary-2.9.9-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:6e6f98446430fdf41bd36d4faa6cb409f5140c1c2cf58ce0bbdaf16af7d3f119"},
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{file = "psycopg2_binary-2.9.9-cp312-cp312-musllinux_1_1_aarch64.whl", hash = "sha256:c77e3d1862452565875eb31bdb45ac62502feabbd53429fdc39a1cc341d681ba"},
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{file = "psycopg2_binary-2.9.9-cp312-cp312-musllinux_1_1_i686.whl", hash = "sha256:cb16c65dcb648d0a43a2521f2f0a2300f40639f6f8c1ecbc662141e4e3e1ee07"},
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{file = "psycopg2_binary-2.9.9-cp312-cp312-win32.whl", hash = "sha256:64cf30263844fa208851ebb13b0732ce674d8ec6a0c86a4e160495d299ba3c93"},
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]
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[[package]]
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||||
name = "python-dotenv"
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version = "1.0.1"
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||||
requires_python = ">=3.8"
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||||
summary = "Read key-value pairs from a .env file and set them as environment variables"
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groups = ["default"]
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||||
files = [
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||||
{file = "python-dotenv-1.0.1.tar.gz", hash = "sha256:e324ee90a023d808f1959c46bcbc04446a10ced277783dc6ee09987c37ec10ca"},
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{file = "python_dotenv-1.0.1-py3-none-any.whl", hash = "sha256:f7b63ef50f1b690dddf550d03497b66d609393b40b564ed0d674909a68ebf16a"},
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]
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[project]
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name = "hello-postgres"
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version = "0.1.0"
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description = "A project I'm working on to learn how to use Postgres with Python."
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authors = [
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{name = "slashtechno", email = "77907286+slashtechno@users.noreply.github.com"},
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]
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dependencies = [
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"psycopg2-binary>=2.9.9",
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"python-dotenv>=1.0.1",
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]
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requires-python = ">=3.12"
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readme = "README.md"
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license = {text = "MIT"}
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[build-system]
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requires = ["pdm-backend"]
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build-backend = "pdm.backend"
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[project.scripts]
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hello-postgres = "hello_postgres.__main__:main"
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[tool.pdm]
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distribution = true
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# https://www.freecodecamp.org/news/postgresql-in-python/
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import psycopg2
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import dotenv
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import os
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def main():
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cursor = connect()
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def connect():
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global conn
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dotenv.load_dotenv()
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conn = psycopg2.connect(
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database=os.getenv('POSTGRES_DB'),
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host=os.getenv('DB_HOST'),
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port=os.getenv('DB_PORT'),
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user=os.getenv('POSTGRES_USER'),
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password=os.getenv('POSTGRES_PASSWORD')
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)
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main()
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