diff options
Diffstat (limited to 'Doc/library/thread.rst')
| -rw-r--r-- | Doc/library/thread.rst | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Doc/library/thread.rst b/Doc/library/thread.rst index 31d58e7..d7d140e 100644 --- a/Doc/library/thread.rst +++ b/Doc/library/thread.rst @@ -147,6 +147,11 @@ In addition to these methods, lock objects can also be used via the exception will be received by an arbitrary thread. (When the :mod:`signal` module is available, interrupts always go to the main thread.) +* The import machinery is not thread safe. In general, an import may not + have the side effect of importing a module, and only the main thread + should import modules. Imports within or caused by a thread other than + the main thread isn't safe. + * Calling :func:`sys.exit` or raising the :exc:`SystemExit` exception is equivalent to calling :func:`exit`. @@ -167,4 +172,3 @@ In addition to these methods, lock objects can also be used via the * When the main thread exits, it does not do any of its usual cleanup (except that :keyword:`try` ... :keyword:`finally` clauses are honored), and the standard I/O files are not flushed. - |