all Python 3osfunction

os.spawnve

os — running programs (spawn)

Like spawnv, but with an explicit environment dict.

Syntax

os.spawnve(...)

As with execve, the environment is replaced entirely: without PATH, HOME and LANG the program will not get them. The program path must be complete. To run with a modified environment subprocess.run(args, env={**os.environ, ...}) is handier.

Examples

import os
import sys
env = {**os.environ, 'GREETING': 'hello'}   # env заменяет окружение целиком, поэтому его копируют из os.environ
print(env['GREETING'])   # → hello
print(os.spawnve(os.P_WAIT, sys.executable, ['python', '-c', 'import os; print(os.environ["GREETING"])'], env))   # → сначала потомок печатает hello, затем 0 — код выхода
print('PATH' in os.environ)   # → True
print('PATH' in {'GREETING': 'hello'})   # → False (с таким «голым» env дочерний процесс останется без PATH)

See also

Common errors

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