compat.py 文件源码

def unsetenv(name):
    """
    Delete the environment variable 'name'.
    """
    # Some platforms (e.g. AIX) do not support `os.unsetenv()` and
    # thus `del os.environ[name]` has no effect onto the real
    # environment. For this case we set the value to the empty string.
    os.environ[name] = ""
    del os.environ[name]


# Exec commands in subprocesses.