Can't install python packages & pip module not found

Question

I've been trying to install packages on a raspberry pi 4b and I keep having issues. On the default, python ver. 3.7, I would get setup.py not found. Then I installed python ver. 3.9 and got the traceback listed below. Lastly I tried installing python ver. 3.8 and I still get the error I got using ver. 3.9. I now also get a "no module named pip" when using python3 -m pip install somePackage

The package I'm trying to install is onnx_tf.

Edit: I've tried purging and reinstalling pip but this did not work.

 Traceback (most recent call last):
 File "/usr/local/bin/pip3", line 11, in <module>
 load_entry_point('pip==20.2.4', 'console_scripts', 'pip3')()
 File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/main.py", line 75, in main
 return command.main(cmd_args)
 File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/base_command.py", line 121, in main
 return self._main(args)
 File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/base_command.py", line 265, in _main
 self.handle_pip_version_check(options)
 File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/req_command.py", line 152, in 
handle_pip_version_check
 timeout=min(5, options.timeout)
 File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/req_command.py", line 97, in 
_build_session
 index_urls=self._get_index_urls(options),
 File "/usr/local/lib/python2.7/dist-packages/pip/_internal/network/session.py", line 249, in __init__
 self.headers["User-Agent"] = user_agent()
 File "/usr/local/lib/python2.7/dist-packages/pip/_internal/network/session.py", line 132, in user_agent
 zip(["name", "version", "id"], distro.linux_distribution()),
 File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/distro.py", line 125, in linux_distribution
 return _distro.linux_distribution(full_distribution_name)
 File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/distro.py", line 681, in linux_distribution
 self.version(),
 File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/distro.py", line 741, in version
 self.lsb_release_attr('release'),
 File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/distro.py", line 903, in lsb_release_attr
 return self._lsb_release_info.get(attribute, '')
 File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/distro.py", line 556, in __get__
 ret = obj.__dict__[self._fname] = self._f(obj)
 File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/distro.py", line 1014, in _lsb_release_info
 stdout = subprocess.check_output(cmd, stderr=devnull)
 File "/usr/lib/python2.7/subprocess.py", line 223, in check_output
 raise CalledProcessError(retcode, cmd, output=output)
subprocess.CalledProcessError: Command '('lsb_release', '-a')' returned non-zero exit status 1
pi@raspberrypi:~ $ python3 -m pip install onnx_tf
/usr/bin/python3: No module named pip

• joan: I think you are pretty much on your own once you start to download packages almost at random. I suggest you get back to a default Raspbian install and then ask again. Your issue seems to start with the mistaken belief that a "setup.py" must exist.
• colonelgdr: I see, that's unfortunate
• Mats Karlsson: Have you installed pip? sudo apt install python3-pip
• colonelgdr: Yes, I have tried that.

Answer 1

What do you mean setup.py not found? What were you trying to do?

Installing different python versions is not advised unless you really know what you're doing.

If you're on the desktop image, you have pip3. If you're on the lite image, run sudo apt install python3-pip and then you have everything you need.

• colonelgdr: I get this now using ver. 3.7: pastebin.com/UcfDtAY9 It's different but can I fix this?
• ben_nuttall: Your pip3 is pointed at python 2. You need to start again with a fresh image.