diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/library/runpy.rst | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/Doc/library/runpy.rst b/Doc/library/runpy.rst index ce8aa99..cfaab94 100644 --- a/Doc/library/runpy.rst +++ b/Doc/library/runpy.rst @@ -52,11 +52,9 @@ The :mod:`runpy` module provides a single function: If the argument *alter_sys* is supplied and evaluates to ``True``, then ``sys.argv[0]`` is updated with the value of ``__file__`` and - ``sys.modules[__name__]`` is updated with a new module object for the module - being executed. Note that neither ``sys.argv[0]`` nor ``sys.modules[__name__]`` - are restored to their original values before the function returns - if client - code needs these values preserved, it must either save them explicitly or else - avoid enabling the automatic alterations to :mod:`sys`. + ``sys.modules[__name__]`` is updated with a temporary module object for the + module being executed. Both ``sys.argv[0]`` and ``sys.modules[__name__]`` + are restored to their original values before the function returns. Note that this manipulation of :mod:`sys` is not thread-safe. Other threads may see the partially initialised module, as well as the altered list of arguments. |