Eclipse - pydev - Fatal Python error: Py_Initialize: Unable to get the locale encoding

Question

I have a python 3 script that I am invoking from another Python 2.7.x script, using subprocess.popen.

myproc = subprocess.Popen(
         "/path/to/my/python/3/script",
          stdout=subprocess.PIPE,
          stderr=subprocess.PIPE,
          cwd=mypwd,
          shell=True)

When I debug this script using Eclipse and print out stderr I see the following issue:

Fatal Python error: Py_Initialize: Unable to get the locale encoding

The issue is NOT seen when I execute the same code in a script outside Eclipse.

Any help to solve this will be greatly appreciated!

Just added a response which may fix this issue too at: stackoverflow.com/a/45801382/110451 — Fabio Zadrozny
– Fabio Zadrozny, Commented Aug 21, 2017 at 18:00

user3535644 · Accepted Answer · 2016-08-26 09:20:30Z

1

Same problem with subprocess.check_call

I've solved mine passing env

subprocess.check_call(cmd,env={'PATH': '/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games',
                                       'LANG': 'it_IT.UTF-8',
                                       })

I think pydev changes environment to do some magic. Not sure both PATH and LANG needed.

answered Aug 26, 2016 at 9:20

user3535644

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1 Comment

rbaleksandar Over a year ago

Tested and confirmed that this is a PyDev issue. I started my script from the terminal and no problems at all. However instead of doing what you are doing I would suggest trying to find the properties in PyDev (general settings or the specific project) instead of passing fixed values. The problem with your solution is that the moment the path and/or the LANG have different values (though valid ones for the rest of the operating system) your solution will fail.

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