Repository navigation
[feature request] Method to refresh os.environ #119737
Description
Bug report
Bug description:
os.environ doesn't reflect environment changes that are made outside of Python.
For example, this code adds the environment XXX but os.environ doesn't see this change.
This program:
import os
import ctypes
import ctypes.util
clib = ctypes.util.find_library("c")
dll = ctypes.CDLL(clib)
setenv = dll.setenv
setenv.argtypes = [ctypes.POINTER(ctypes.c_char), ctypes.POINTER(ctypes.c_char), ctypes.c_int]
getenv = dll.getenv
getenv.argtypes = [ctypes.POINTER(ctypes.c_char)]
getenv.restype=ctypes.c_char_p
# set XXX outside of Python's os.environ
setenv(b"XXX", b"Hello", 2)
print(f'real XXX value: {str(getenv(b"XXX"))}')
print(f'XXX is in os.getenv: {os.getenv("XXX")}')
print(f'XXX is in os.environ: {"YES" if "XXX" in os.environ else "NO"}')prints:
real XXX value: b'Hello' XXX is in os.getenv: None XXX is in os.environ: NO
There should be a method, for example os.environ_refresh, that would re-read environment into os.environ.
I've hit this on the real-world case when Python didn't see environment set by TCL script executed in the same process.
CPython versions tested on:
3.9
Operating systems tested on:
Other
Activity
itamaro commented on Jun 1, 2024
the behavior matches the documented behavior:
so this is not a bug, but a feature request.
please propose this on the Python discuss ideas category first!
eryksun commented on Jun 1, 2024
This new feature would have to be implemented in C in "Modules/posixmodule.c". That's why I added the "extension-modules" label.
yurivict commented on Jun 2, 2024
https://discuss.python.org/t/feature-request-method-to-refresh-os-environ/54774
vstinner commented on Jun 5, 2024
I close this issue as a duplicate of #120057