title: Shebang doesn't work with python3
body: <p>I have the following program:</p>
  
  <pre><code>#!/usr/local/bin/python3
  
  print("Hello")
  </code></pre>
  
  <p>Via terminal I do <code>test.py</code> and I get:</p>
  
  <pre><code>Traceback (most recent call last):
    File "/usr/lib/python3.3/site.py", line 629, in &lt;module&gt;
      main()
    File "/usr/lib/python3.3/site.py", line 614, in main
      known_paths = addusersitepackages(known_paths)
    File "/usr/lib/python3.3/site.py", line 284, in addusersitepackages
      user_site = getusersitepackages()
    File "/usr/lib/python3.3/site.py", line 260, in getusersitepackages
      user_base = getuserbase() # this will also set USER_BASE
    File "/usr/lib/python3.3/site.py", line 250, in getuserbase
      USER_BASE = get_config_var('userbase')
    File "/usr/lib/python3.3/sysconfig.py", line 610, in get_config_var
      return get_config_vars().get(name)
    File "/usr/lib/python3.3/sysconfig.py", line 560, in get_config_vars
      _init_posix(_CONFIG_VARS)
    File "/usr/lib/python3.3/sysconfig.py", line 432, in _init_posix
      from _sysconfigdata import build_time_vars
    File "/usr/lib/python3.3/_sysconfigdata.py", line 6, in &lt;module&gt;
      from _sysconfigdata_m import *
  ImportError: No module named '_sysconfigdata_m'
  </code></pre>
  
  <p>Instead if I type <code>python3 test.py</code> it works, I get:</p>
  
  <p><code>Hello</code></p>
  
  <p>P.S. <code>which python3</code> ----> <code>/usr/local/bin/python3</code></p>