johnnydep 0.4

Display dependency tree of Python distribution

[](https://travis-ci.org/wimglenn/johnnydep) [](https://coveralls.io/github/wimglenn/johnnydep?branch=CI) [](https://pypi.org/project/johnnydep/)

Johnnydep
=========

Pretty-print a dependency tree for a Python distribution. A simple example:

$ johnnydep requests
name summary
------------------------- ----------------------------------------------------------------------
requests Python HTTP for Humans.
├── certifi>=2017.4.17 Python package for providing Mozilla's CA Bundle.
├── chardet<3.1.0,>=3.0.2 Universal encoding detector for Python 2 and 3
├── idna<2.8,>=2.5 Internationalized Domain Names in Applications (IDNA)
└── urllib3<1.24,>=1.21.1 HTTP library with thread-safe connection pooling, file post, and more.

A more complex tree:

$ johnnydep boto3
name summary
--------------------------------------- -------------------------------------------------
boto3 The AWS SDK for Python
├── botocore<1.11.0,>=1.10.77 Low-level, data-driven core of boto 3.
│ ├── docutils>=0.10 Docutils -- Python Documentation Utilities
│ ├── jmespath<1.0.0,>=0.7.1 JSON Matching Expressions
│ └── python-dateutil<3.0.0,>=2.1 Extensions to the standard Python datetime module
│ └── six>=1.5 Python 2 and 3 compatibility utilities
├── jmespath<1.0.0,>=0.7.1 JSON Matching Expressions
└── s3transfer<0.2.0,>=0.1.10 An Amazon S3 Transfer Manager
└── botocore<2.0.0,>=1.3.0 Low-level, data-driven core of boto 3.
├── docutils>=0.10 Docutils -- Python Documentation Utilities
├── jmespath<1.0.0,>=0.7.1 JSON Matching Expressions
└── python-dateutil<3.0.0,>=2.1 Extensions to the standard Python datetime module
└── six>=1.5 Python 2 and 3 compatibility utilities

Johnnydep can also resolve the dependency tree, something `pip` often struggles with ([`pip install` has lacked a solver](https://github.com/pypa/pip/issues/988) for many years)

$ johnnydep ipython --output-format pinned
ipython==6.5.0
appnope==0.1.0
backcall==0.1.0
decorator==4.3.0
jedi==0.12.1
pexpect==4.6.0
pickleshare==0.7.4
prompt-toolkit==1.0.15
pygments==2.2.0
setuptools==40.0.0
simplegeneric==0.8.1
traitlets==4.3.2
parso==0.3.1
ptyprocess==0.6.0
six==1.11.0
wcwidth==0.1.7
ipython-genutils==0.2.0

Check `johnnydep --help` for other features and options.


Helpful links
-------------

* [Core metadata specifications](https://packaging.python.org/specifications/core-metadata/)
* [PEP 427 -- The Wheel Binary Package Format 1.0](https://www.python.org/dev/peps/pep-0427/)
* [PEP 426 -- Metadata for Python Software Packages 2.0](https://www.python.org/dev/peps/pep-0426/) (now [revoked](https://www.python.org/dev/peps/pep-0426/#pep-withdrawal) but still commonly seen in the wild)
* [PEP 566 -- Metadata for Python Software Packages 2.1](https://www.python.org/dev/peps/pep-0566/)
* [PEP 503 -- Simple Repository API](https://www.python.org/dev/peps/pep-0503/)