[issue32573] All sys attributes (.argv, ...) should exist in embedded environments

[Dieter Weber]

Change by Dieter Weber :


--
keywords: +patch
pull_requests: +13153
stage:  -> patch review

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[issue35706] Make it easier to use a venv with an embedded Python interpreter

[Dieter Weber]

Change by Dieter Weber :


--
title: Making an embedded Python interpreter use a venv is difficult -> Make it 
easier to use a venv with an embedded Python interpreter

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[issue35706] Making an embedded Python interpreter use a venv is difficult

[Dieter Weber]

Change by Dieter Weber :


Removed file: https://bugs.python.org/file48039/Source.cpp

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[issue35706] Making an embedded Python interpreter use a venv is difficult

[Dieter Weber]

Change by Dieter Weber :


Added file: https://bugs.python.org/file48040/Source.cpp

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[issue35706] Making an embedded Python interpreter use a venv is difficult

[Dieter Weber]

New submission from Dieter Weber :

Python virtual environments are awesome! Using venvs with an embedded Python 
interpreter has proven difficult, unfortunately. With conda environments it 
works. See appended a sample file to reproduce the behavior.

The core of the problem seems to be that a venv doesn't contain a full Python 
installation, and Py_Initialize() apparently doesn't support setting up the 
combination of venv directories and base installation correctly, i.e. setting 
sys.prefix and sys.base_prefix and potentially other values.

Observed behavior when trying to use a venv:

"""
Initializing... Fatal Python error: Py_Initialize: unable to load the file 
system codec
ModuleNotFoundError: No module named 'encodings'

Current thread 0x1e90 (most recent call first):
"""

Expected behavior:
Setting Py_SetPythonHome() to a venv works and sets up all paths and prefixes 
correctly to use the venv, just like it does for a conda environment.

--
files: Source.cpp
messages: 78
nosy: Dieter Weber
priority: normal
severity: normal
status: open
title: Making an embedded Python interpreter use a venv is difficult
type: enhancement
versions: Python 3.6
Added file: https://bugs.python.org/file48039/Source.cpp

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