Packaging a Python Project using pyproject.toml File in the Package Folder

What will you learn?

  • Learn how to effectively structure and package a Python project.
  • Understand the significance of the pyproject.toml file in managing project dependencies.

Introduction to the Problem and Solution

When working on Python projects, organizing and packaging code efficiently is crucial for better management and distribution. The pyproject.toml file plays a vital role in Python’s packaging ecosystem, especially with tools like Poetry or Flit, by defining project metadata, dependencies, build settings, etc.

By mastering the utilization of the pyproject.toml file within your project structure, you can ensure that your project is well-packaged and prepared for distribution both locally and publicly through platforms like PyPI (Python Package Index).


# This example demonstrates a pyproject.toml file for a Python project
requires = ["setuptools>=42", "wheel"]
build-backend = "setuptools.build_meta"

name = "my-python-project"
version = "0.1.0"
description = "A sample Python project"
authors = ["Your Name <>"]

python = "^3.8"

pytest = "^6.2"

# For more information visit [](

# Copyright PHD


The provided code snippet illustrates a basic configuration of pyproject.toml for a hypothetical Python project named “my-python-project”. Here’s an explanation of key sections: – [build-system] specifies requirements and backend info needed by build tools. – [tool.poetry] includes metadata about the package like name, version, description. – [tool.poetry.dependencies] lists runtime dependencies while dev-dependencies lists those required only during development.

This configuration simplifies dependency management & allows tools like Poetry to install/manage dependencies efficiently based on these specifications.

    What is the purpose of pyproject.toml?

    Answer: The pyproject.toml file serves as a central place to define various aspects of a Python project such as its metadata, build system requirements, dependencies, scripts definition among others.

    Can I use pip instead of Poetry with pyproject.toml?

    Answer: Yes, you can still use pip with pyproject.toml, but it’s more commonly associated with modern packaging tools like Poetry or Flit which fully leverage its capabilities.

    How does pyproject.toml differ from

    Answer: was traditionally used for packaging but lacks certain features like PEP 517/518 compatibility; whereas pyproject.toml provides enhanced configurability especially when working with modern tooling setups.

    Can I have multiple projects within one pyproject.toml?

    Answer: Typically each directory containing source code constitutes one single ‘package’ within which resides one corresponding pyproject.tml.

    Is it necessary to include all packages under [tool.poetry.dependencies]?

    Answer: While main runtime dependencies go under [tool.poetry.dependencies], optional/dev-only packages are placed under [].

    Should every dependency be included in …

    Description – It�s good practice though not mandatory that all direct run-time dependencies are listed explicitly under �dependencies� table.

    Is there any benefit in specifying exact…

    Description – By providing exact versions rather than ranges in dependencies section makes builds reproducible without unexpected conflicts.

    Are comments allowed inside .tom…

    Description – Comments are permitted within TOML files marked by # symbol at line beginnings thus ignored by parsers.

    Can poetry.lock coexist w…

    _Header_ Conclusion

    _Descripiton_ In conclusion..blah blah…

    _Header_ Tags

    _Tagging_ Python Packaging, PyProject.Toml File

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