Is there any way to show the dependency trees for pip packages?

Question

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 file as you indicated directly. However the source (255 lines of python code) should be relatively easy to modify to your needs, or alternatively you can (as @MERose indicated is in the pipdeptree 0.3 README ) out use:

pipdeptree --freeze  --warn silence | grep -P '^[\w0-9\-=.]+' > requirements.txt

The 0.5 version of pipdeptree also allows JSON output with the --json option, that is more easily machine parseble, at the expense of being less readable.

Warning: py2 only / abandonware

yolk can display dependencies for packages, provided that they

• were installed via setuptools

• came with metadata that includes dependency information

  $ yolk -d Theano
  Theano 0.6.0rc3
    scipy>=0.7.2
    numpy>=1.5.0
  

You can do it by installing pipdeptree package.

Open command prompt in your project folder. If you are using any virtual environment, then switch to that virtual environment.

Install pipdeptree package using pip

pip install pipdeptree
pipdeptree -fl

This package will list all the dependencies of your project.

For more pipdeptree