Identifying the dependency relationship for python packages installed with pip

Question

When I do a pip freeze I see large number of Python packages that I didn\'t explicitly install, e.g.

$ pip freeze
Cheetah==2.4.3
GnuPGInterface==0.3.2
Landsc         


        

Answer 1

You could try pipdeptree which displays dependencies as a tree structure e.g.:

$ pipdeptree
Lookupy==0.1
wsgiref==0.1.2
argparse==1.2.1
psycopg2==2.5.2
Flask-Script==0.6.6
  - Flask [installed: 0.10.1]
    - Werkzeug [required: >=0.7, installed: 0.9.4]
    - Jinja2 [required: >=2.4, installed: 2.7.2]
      - MarkupSafe [installed: 0.18]
    - itsdangerous [required: >=0.21, installed: 0.23]
alembic==0.6.2
  - SQLAlchemy [required: >=0.7.3, installed: 0.9.1]
  - Mako [installed: 0.9.1]
    - MarkupSafe [required: >=0.9.2, installed: 0.18]
ipython==2.0.0
slugify==0.0.1
redis==2.9.1

To get it run:

pip install pipdeptree

EDIT: as noted by @Esteban in the comments you can also list the tree in reverse with -r or for a single package with -p so to find what installed Werkzeug you could run:

$ pipdeptree -r -p Werkzeug
Werkzeug==0.11.15
  - Flask==0.12 [requires: Werkzeug>=0.7]