[Bug 1445764] Re: "The executable /usr/bin/python3.4 does not exist" error when Installing Mailman 3 on Centos 7

[Danil Smirnov]

1) All they were removed right after they did not help.

2) Removed several times with the whole mailman-bundler/ directory.

3) Did it all the time after pulling once.

4) I don't want to fix or work around, I can wait until we will
understand what happening. I 'm going to run additional tests with
another version of Centos tomorrow.

Answer:

[root at host ~]# cd
[root at host ~]# virtualenv -p python3.4 xxx
Running virtualenv with interpreter /usr/local/bin/python3.4
Using base prefix '/usr/local'
New python executable in xxx/bin/python3.4
Also creating executable in xxx/bin/python
Failed to import the site module
Traceback (most recent call last):
  File "/root/xxx/lib/python3.4/site.py", line 67, in <module>
    import os
  File "/root/xxx/lib/python3.4/os.py", line 616, in <module>
    from _collections_abc import MutableMapping
ImportError: No module named '_collections_abc'
ERROR: The executable xxx/bin/python3.4 is not functioning
ERROR: It thinks sys.prefix is '/root' (should be '/root/xxx')
ERROR: virtualenv is not compatible with this system or executable
[root at host ~]# ./xxx/bin/python
Failed to import the site module
Traceback (most recent call last):
  File "/root/xxx/lib/python3.4/site.py", line 67, in <module>
    import os
  File "/root/xxx/lib/python3.4/os.py", line 616, in <module>
    from _collections_abc import MutableMapping
ImportError: No module named '_collections_abc'

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https://bugs.launchpad.net/bugs/1445764

Title:
  "The executable /usr/bin/python3.4 does not exist" error when
  Installing Mailman 3 on Centos 7

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