[Python-checkins] cpython (3.2): #16152: fix tokenize to ignore whitespace at the end of the code when no

[ezio.melotti]

http://hg.python.org/cpython/rev/3ffff1798ed5
changeset:   80191:3ffff1798ed5
branch:      3.2
parent:      80176:cf62fbf2171a
user:        Ezio Melotti <ezio.melotti at gmail.com>
date:        Sat Nov 03 17:38:43 2012 +0200
summary:
  #16152: fix tokenize to ignore whitespace at the end of the code when no newline is found.  Patch by Ned Batchelder.

files:
  Lib/test/test_tokenize.py |  5 +++++
  Lib/tokenize.py           |  4 +++-
  Misc/ACKS                 |  1 +
  Misc/NEWS                 |  3 +++
  4 files changed, 12 insertions(+), 1 deletions(-)


diff --git a/Lib/test/test_tokenize.py b/Lib/test/test_tokenize.py
--- a/Lib/test/test_tokenize.py
+++ b/Lib/test/test_tokenize.py
@@ -552,6 +552,11 @@
     DEDENT     ''            (4, 0) (4, 0)
     DEDENT     ''            (4, 0) (4, 0)
 
+Pathological whitespace (http://bugs.python.org/issue16152)
+    >>> dump_tokens("@          ")
+    ENCODING   'utf-8'       (0, 0) (0, 0)
+    OP         '@'           (1, 0) (1, 1)
+
 Non-ascii identifiers
 
     >>> dump_tokens("Örter = 'places'\\ngrün = 'green'")
diff --git a/Lib/tokenize.py b/Lib/tokenize.py
--- a/Lib/tokenize.py
+++ b/Lib/tokenize.py
@@ -108,7 +108,7 @@
                 group("'", r'\\\r?\n'),
                 r'[bB]?[rR]?"[^\n"\\]*(?:\\.[^\n"\\]*)*' +
                 group('"', r'\\\r?\n'))
-PseudoExtras = group(r'\\\r?\n', Comment, Triple)
+PseudoExtras = group(r'\\\r?\n|\Z', Comment, Triple)
 PseudoToken = Whitespace + group(PseudoExtras, Number, Funny, ContStr, Name)
 
 def _compile(expr):
@@ -473,6 +473,8 @@
             if pseudomatch:                                # scan for tokens
                 start, end = pseudomatch.span(1)
                 spos, epos, pos = (lnum, start), (lnum, end), end
+                if start == end:
+                    continue
                 token, initial = line[start:end], line[start]
 
                 if (initial in numchars or                  # ordinary number
diff --git a/Misc/ACKS b/Misc/ACKS
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -71,6 +71,7 @@
 Ulf Bartelt
 Don Bashford
 Nick Bastin
+Ned Batchelder
 Jeff Bauer
 Mike Bayer
 Michael R Bax
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -143,6 +143,9 @@
 Library
 -------
 
+- Issue #16152: fix tokenize to ignore whitespace at the end of the code when
+  no newline is found.  Patch by Ned Batchelder.
+
 - Issue #1207589: Add Cut/Copy/Paste items to IDLE right click Context Menu
   Patch by Todd Rovito.
 

-- 
Repository URL: http://hg.python.org/cpython