In addition to the pip show [package name]pipdeptree
Just do
$ pip install pipdeptree
then run
$ pipdeptree
and it will show you your dependencies in a tree form, e.g.,
flake8==2.5.0
- mccabe [required: >=0.2.1,<0.4, installed: 0.3.1]
- pep8 [required: !=1.6.0,>=1.5.7,!=1.6.1,!=1.6.2, installed: 1.5.7]
- pyflakes [required: >=0.8.1,<1.1, installed: 1.0.0]
ipdb==0.8
- ipython [required: >=0.10, installed: 1.1.0]
The project is located at https://github.com/naiquevin/pipdeptree, where you will also find usage information.
Update (2021):
Since pip
pkg=httplib2
pip show $pkg | grep ^Required-by
or for bash
pkg=httplib2
grep ^Required-by <(pip show $pkg)
so you could create an alias like:
alias pyreq='pip show $pkg | grep ^Required-by'
and querying by:
pkg=httplib2 pyreq
which should give (for ubuntu):
Required-by: lazr.restfulclient, launchpadlib
Original:
Quite straightforward:
pip show <insert_package_name_here>| grep ^Requires
Or the other way around: (sorry i got it wrong!)
for NAME in $(pip freeze | cut -d= -f1); do REQ=$(pip show $NAME| grep Requires); if [[ "$REQ" =~ "$REQUIRES" ]]; then echo $REQ;echo "Package: $NAME"; echo "---" ; fi; done
before that set your search-string with:
REQUIRES=django
essentially you have to go through the whole list and query for every single one. That may take some time.
Edit: Also it does only work on installed packages, I don't see pip providing dependencies on not installed packages.
You should take a look at pipdeptree
$ pip install pipdeptree
$ pipdeptree -fl
Warning!!! Cyclic dependencies found:
------------------------------------------------------------------------
xlwt==0.7.5
ruamel.ext.rtf==0.1.1
xlrd==0.9.3
openpyxl==2.0.4
- jdcal==1.0
pymongo==2.7.1
reportlab==3.1.8
- Pillow==2.5.1
- pip
- setuptools
It doesn't generate a requirements.txt
pipdeptree --freeze --warn silence | grep -P '^[\w0-9\-=.]+' > requirements.txt
The 0.5 version of pipdeptree--json
Turns out for the dependencies to be installed, the packages needs to list its dependencies as
install_requires=[
'numpy',
'pyyaml'
],
as part of setup()setup.pyrequirements.txt
PyPi provides a JSON endpoint with package metadata:
>>> import requests
>>> url = 'https://pypi.org/pypi/{}/json'
>>> json = requests.get(url.format('pandas')).json()
>>> json['info']['requires_dist']
['numpy (>=1.9.0)', 'pytz (>=2011k)', 'python-dateutil (>=2.5.0)']
>>> json['info']['requires_python']
'>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*'
For a specific package version, add an additional version segment to the URL:
https://pypi.org/pypi/pandas/0.22.0/json
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
-r-p <package_name>$ pipdeptree -r -p Werkzeug
Werkzeug==0.11.15
- Flask==0.12 [requires: Werkzeug>=0.7]
Note that this answer from 2012 is out of date. First, the workaround, which the answer already said you probably shouldn't do in 2012, now you can't do it. If you want a similar workaround, you could use pip downloadpip show
You can't, at least not directly.
You can import the pip module in your own code and download the requirements file and then iterate through it. Or, from the command line, you can pip install --no-install --verbose
But really, unless this is something you need to automate, it's probably easier to just go to http://pypi.python.org/ and search for the package there instead of using pip.
This was tested with pip versions 8.1.2, 9.0.1, 10.0.1, and 18.1.
To get the output without cluttering your current directory on Linux use
pip download [package] -d /tmp --no-binary :all: -v
-d
Better, just use this script with the argument being the package name to get only the dependencies as output:
#!/bin/sh
PACKAGE=$1
pip download $PACKAGE -d /tmp --no-binary :all:-v 2>&1 \
| grep Collecting \
| cut -d' ' -f2 \
| grep -Ev "$PACKAGE(~|=|\!|>|<|$)"
Also available here.