From: INADA Naoki <methane@users.noreply.github.com>
Date: Sat, 27 Jan 2018 01:10:06 +0000 (+0900)
Subject: bpo-32678: inspect: Import ast lazily (GH-5344)
X-Git-Tag: v3.7.0b1~89
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=37420deb80dcf0fc41a728838b0340b93ca01d90;p=thirdparty%2FPython%2Fcpython.git

bpo-32678: inspect: Import ast lazily (GH-5344)
---

diff --git a/Lib/inspect.py b/Lib/inspect.py
index b7551878b749..bc97efe179ca 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -32,7 +32,6 @@ __author__ = ('Ka-Ping Yee <ping@lfw.org>',
               'Yury Selivanov <yselivanov@sprymix.com>')
 
 import abc
-import ast
 import dis
 import collections.abc
 import enum
@@ -1940,6 +1939,9 @@ def _signature_fromstr(cls, obj, s, skip_bound_arg=True):
     """Private helper to parse content of '__text_signature__'
     and return a Signature based on it.
     """
+    # Lazy import ast because it's relatively heavy and
+    # it's not used for other than this function.
+    import ast
 
     Parameter = cls._parameter_cls