Python Example information not working on Debian/Ubuntu.

[XerTheSquirrel]

Description

Building of the example archive package does not work because Debian/Ubuntu has different behavior for Python.

Steps to reproduce the issue:

1. Install python-pip on Debian (stable or testing as of this writing).
2. git clone https://github.com/iopipe/examples/
3. cd examples
4. cd python
5. python3 archive.py

Describe the results you received:

An invalid archive.zip with the given error trace:

stephanie@oaktree:~/iopipe/iopipe-examples/python$ python3 archive.py
Installing dependencies into libs directory...
Exception:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 360, in run
    prefix=options.prefix_path,
  File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 784, in install
    **kwargs
  File "/usr/lib/python2.7/dist-packages/pip/req/req_install.py", line 851, in install
    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
  File "/usr/lib/python2.7/dist-packages/pip/req/req_install.py", line 1064, in move_wheel_files
    isolated=self.isolated,
  File "/usr/lib/python2.7/dist-packages/pip/wheel.py", line 247, in move_wheel_files
    prefix=prefix,
  File "/usr/lib/python2.7/dist-packages/pip/locations.py", line 153, in distutils_scheme
    i.finalize_options()
  File "/usr/lib/python2.7/distutils/command/install.py", line 289, in finalize_options
    raise DistutilsOptionError("can't combine user with prefix, "
DistutilsOptionError: can't combine user with prefix, exec_prefix/home, or install_(plat)base
Generating archive.zip...

@kolanos
From: iopipe/iopipe-python#248

Describe the results you expected:

Getting archive.zip that is valid and no nasty error messages.

Additional information you deem important (e.g. issue happens only occasionally):

Adding --system before -t makes the build a success using the archive.py script.

subprocess.call([PIP, 'install', '-r', 'requirements.txt', '--system', '-t', 'libs'], stdout=subprocess.PIPE)

See:

• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=830892
• --target does not work with --user pypa/pip#3826

[XerTheSquirrel]

Replying to iopipe/iopipe-python#248 (comment):

I do not have pip3 at all, but I am installing it right now.