ImportError: No module named rez.cli._entry_points

[slvfx]

Describe the bug here.

Environment

• OS (Windows 7)
• Rez version (2.111.3)
• Rez python version (the command to get this fails)
• Python version (2.7.18)

To Reproduce
The first issue is that it fails to install:

./install.py -v C:/Rez
c:\rez\scripts\python.exe: No module named pip

Looking in C:/Rez/Lib/site-packages I noticed it was empty. So I tried copying over the default packages in site-packages from my Python 2.7.18 installation (including pip).

That worked! Or did it:

SUCCESS!
Rez executable installed to: C:\Rez\Scripts\rez\rez
Traceback (most recent call last):
  File "C:\Python27\Lib\runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "C:\Python27\Lib\runpy.py", line 72, in _run_code
    exec code in run_globals
  File "C:\Rez\Scripts\rez\rez.exe\__main__.py", line 4, in <module>
ImportError: No module named rez.cli._entry_points

To activate Rez, add the following path to $PATH:
C:\Rez\Scripts\rez

Indeed, every rez command I try to run has that error:

ImportError: No module named rez.cli._entry_points

Is my Windows and/or Python too old?

[maxnbk]

Is the behavior any different if you run it from python rather than as a CLI script?
i.e. python install.py [...]

[slvfx]

No, exactly the same. That's with using Python 2.7.18.

[slvfx]

This seems to have been caused by a similar issue. Not only did the install not copy the default packages from python's site-packages, it also didn't copy the packages from rez-2.111.3/src:

build_utils
rez
rezgui
rezplugins
support

I manually copied those to C:\Rez\Lib\site-packages and that (almost) seemed to fix the issue:

$ rez --help
Traceback (most recent call last):
...
SyntaxError: Non-ASCII character '\xe2' in file c:\rez\lib\site-packages\rez\cli\selftest.py on line 38, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details

I deleted the offending lines (which was a help message) and now rez (might) be working.

For the record, I had the same issue when trying to install with Python 3.7, except for that last error.

[JeanChristopheMorinPerso]

Can you provide the full log when you run the install.py script please? Also please run the install with <path to python.exe> install.py <the other ARGS> so that we can be sure which python interpreter is being used.

Also, as a side note, it's generally a pretty bad idea to copy/paste/move files from one site-packages to another.

[slvfx]

Totally agree on copy/pasting from site-packages- I'd prefer the installer do that.

Where would the full log be? This is what I see in a Windows command prompt for the first failure:

C:\Users\slvfx\src\rez-2.111.3>C:\Python27\python.exe install.py -v C:\Rez
installing rez to C:\Rez...
running in C:\Users\slvfx\src\rez-2.111.3: c:\rez\scripts\python.exe -m pip install .
c:\rez\scripts\python.exe: No module named pip
Traceback (most recent call last):
  File "install.py", line 311, in <module>
    install(dest_dir, print_welcome=True)
  File "install.py", line 156, in install
    install_rez_from_source(dest_dir)
  File "install.py", line 223, in install_rez_from_source
    run_command([py_executable, "-m", "pip", "install", "."])
  File "install.py", line 78, in run_command
    return subprocess.check_output(args, cwd=source_path)
  File "C:\Python27\lib\subprocess.py", line 223, in check_output
    raise CalledProcessError(retcode, cmd, output=output)
subprocess.CalledProcessError: Command '['c:\\rez\\scripts\\python.exe', '-m', 'pip', 'install', '.']' returned non-zero exit status 1

Thanks for taking a look.

[JeanChristopheMorinPerso]

That's the full log, thanks.

Running the install.py file creates a virtualenv at the given location (in your case C:\rez) and then runs pip install . and then some other steps that are irrelevant to this issue.

virtualenv is supposed to install pip automatically for you (inside the virtualenv). So something is wrong here because we can see it's not there. Or is it and Windows is just lying to us?

I have a couple of questions:

1. How did you install python on that machine?
2. Is pip installed in this python installation (somewhere in C:\Python27)?
3. What's the content of C:\rez? Does it look like a virtualenv? (Is there activation scripts in the scripts directory?)

[slvfx]

1. I installed it using the Windows msi installer from https://www.python.org/downloads/release/python-2718/
2. Yes, it's under C:\Python27\Lib\site-packages\pip (that's where I copied it and the other packages from, when the rez installer didn't copy them)
3. Yes, I see a bunch of files there with "activation" in the name:

activate
activate.bat
activate.ps1
activate_this.py
deactivate.bat
python.exe
pythonw.exe

Could it be a Windows 7 thing?