From: Jeremy Hylton <jeremy@alum.mit.edu>
Date: Fri, 10 May 2002 21:00:35 +0000 (+0000)
Subject: Use isinstance() in preference to comparison of type by is.
X-Git-Tag: v2.3c1~5694
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e037665f999c2ab5637fd9c2f4ac5c24e44e48f0;p=python

Use isinstance() in preference to comparison of type by is.
---

diff --git a/Lib/StringIO.py b/Lib/StringIO.py
index cc88e9de4d..9225c05286 100644
--- a/Lib/StringIO.py
+++ b/Lib/StringIO.py
@@ -39,7 +39,7 @@ __all__ = ["StringIO"]
 class StringIO:
     def __init__(self, buf = ''):
         # Force self.buf to be a string or unicode
-        if type(buf) is not types.UnicodeType:
+        if not isinstance(buf, types.UnicodeType):
             buf = str(buf)
         self.buf = buf
         self.len = len(buf)
@@ -138,7 +138,7 @@ class StringIO:
             raise ValueError, "I/O operation on closed file"
         if not s: return
         # Force s to be a string or unicode
-        if type(s) is not types.UnicodeType:
+        if not isinstance(s, types.UnicodeType):
             s = str(s)
         if self.pos > self.len:
             self.buflist.append('\0'*(self.pos - self.len))