fix a silly problem of caching gone wrong #5401
diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
index fc0108b..6212e78 100644
--- a/Lib/mimetypes.py
+++ b/Lib/mimetypes.py
@@ -237,7 +237,8 @@
Optional `strict' argument when false adds a bunch of commonly found, but
non-standard types.
"""
- init()
+ if not inited:
+ init()
return guess_type(url, strict)
@@ -254,7 +255,8 @@
Optional `strict' argument when false adds a bunch of commonly found,
but non-standard types.
"""
- init()
+ if not inited:
+ init()
return guess_all_extensions(type, strict)
def guess_extension(type, strict=True):
@@ -269,7 +271,8 @@
Optional `strict' argument when false adds a bunch of commonly found,
but non-standard types.
"""
- init()
+ if not inited:
+ init()
return guess_extension(type, strict)
def add_type(type, ext, strict=True):
@@ -284,7 +287,8 @@
list of standard types, else to the list of non-standard
types.
"""
- init()
+ if not inited:
+ init()
return add_type(type, ext, strict)
diff --git a/Misc/NEWS b/Misc/NEWS
index 36567f7..49a3885 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -166,6 +166,9 @@
Library
-------
+- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
+ import guess_extension`` was used.
+
- Issue #1733986: Fixed mmap crash in accessing elements of second map object
with same tagname but larger size than first map. (Windows)