pip freeze does not show all installed packages

Question

I am using a virtualenv. I have fabric installed, with pip. But a pip freeze does not give any hint about that. The packa

Answer 1

I just tried this myself:

create a virtualenv in to the "env" directory:

$virtualenv2.7 --distribute env
New python executable in env/bin/python
Installing distribute....done.
Installing pip................done.

next, activate the virtual environment:

$source env/bin/activate

the prompt changed. now install fabric:

(env)$pip install fabric
Downloading/unpacking fabric
  Downloading Fabric-1.6.1.tar.gz (216Kb): 216Kb downloaded
  Running setup.py egg_info for package fabric   
...

Successfully installed fabric paramiko pycrypto
Cleaning up...

And pip freeze shows the correct result:

(env)$pip freeze
Fabric==1.6.1
distribute==0.6.27
paramiko==1.10.1
pycrypto==2.6
wsgiref==0.1.2

Maybe you forgot to activate the virtual environment? On a *nix console type which pip to find out.

Answer 2

Although your problem was specifically due to a typo, to help other users:

pip freeze doesn't show the dependencies that pip depends on. If you want to obtain all packages you can use pip freeze --all or pip list.

Answer 3

Adding my fix in addition of above fix also , I was also facing the same issue on windows,even after activating the virtualenv too pip freeze was not giving me all list of installed packages. So i upgraded my pip with python -m pip install --upgrade pip command and then used pip freeze. This time it worked and gave me all list of installed packages.

Answer 4

You can try using the --all flag, like this:

pip freeze --all > requirements.txt

Answer 5

If you have redirected all the pre-installed packages in a file named pip-requirements.txt then it is pretty simple to fix the above issue.

1) Delete your virtualenv folder or create new one (I am giving it a name as venv)

rm -rf venv && virtualenv venv

2) Install all the requirements/dependencies from the pip-requirements.txt

pip install -r pip-requirements.txt

3) Now you can check the installed packages for your Django application

pip freeze

4) If you had forgotten to update your requirements file(pip-requirements.txt), then install fabric again (Optional Step)

Note: After installing any dependency for your Django app, always update the requirements in any file as follows (make sure your virtualenv is activated)

pip freeze > pip requirements.txt

That's it.