[Python-checkins] r54341 - in python/trunk: Doc/lib/libtextwrap.tex Lib/test/test_textwrap.py Lib/textwrap.py Misc/NEWS
georg.brandl
python-checkins at python.org
Tue Mar 13 19:15:46 CET 2007
Author: georg.brandl
Date: Tue Mar 13 19:15:41 2007
New Revision: 54341
Modified:
python/trunk/Doc/lib/libtextwrap.tex
python/trunk/Lib/test/test_textwrap.py
python/trunk/Lib/textwrap.py
python/trunk/Misc/NEWS
Log:
Patch #1581073: add a flag to textwrap that prevents the dropping of
whitespace while wrapping.
Modified: python/trunk/Doc/lib/libtextwrap.tex
==============================================================================
--- python/trunk/Doc/lib/libtextwrap.tex (original)
+++ python/trunk/Doc/lib/libtextwrap.tex Tue Mar 13 19:15:41 2007
@@ -115,6 +115,13 @@
expansion.}
\end{memberdesc}
+\begin{memberdesc}{drop_whitespace}
+(default: \code{True}) If true, whitespace that, after wrapping, happens
+to end up at the beginning or end of a line is dropped (leading whitespace
+in the first line is always preserved, though).
+\versionadded[Whitespace was always dropped in earlier versions]{2.6}
+\end{memberdesc}
+
\begin{memberdesc}{initial_indent}
(default: \code{''}) String that will be prepended to the first line
of wrapped output. Counts towards the length of the first line.
Modified: python/trunk/Lib/test/test_textwrap.py
==============================================================================
--- python/trunk/Lib/test/test_textwrap.py (original)
+++ python/trunk/Lib/test/test_textwrap.py Tue Mar 13 19:15:41 2007
@@ -328,6 +328,14 @@
self.check_wrap(text, 30,
[" This is a sentence with", "leading whitespace."])
+ def test_no_drop_whitespace(self):
+ # SF patch #1581073
+ text = " This is a sentence with much whitespace."
+ self.check_wrap(text, 10,
+ [" This is a", " ", "sentence ",
+ "with ", "much white", "space."],
+ drop_whitespace=False)
+
if test_support.have_unicode:
def test_unicode(self):
# *Very* simple test of wrapping Unicode strings. I'm sure
Modified: python/trunk/Lib/textwrap.py
==============================================================================
--- python/trunk/Lib/textwrap.py (original)
+++ python/trunk/Lib/textwrap.py Tue Mar 13 19:15:41 2007
@@ -63,6 +63,8 @@
break_long_words (default: true)
Break words longer than 'width'. If false, those words will not
be broken, and some lines might be longer than 'width'.
+ drop_whitespace (default: true)
+ Drop leading and trailing whitespace from lines.
"""
whitespace_trans = string.maketrans(_whitespace, ' ' * len(_whitespace))
@@ -98,7 +100,8 @@
expand_tabs=True,
replace_whitespace=True,
fix_sentence_endings=False,
- break_long_words=True):
+ break_long_words=True,
+ drop_whitespace=True):
self.width = width
self.initial_indent = initial_indent
self.subsequent_indent = subsequent_indent
@@ -106,6 +109,7 @@
self.replace_whitespace = replace_whitespace
self.fix_sentence_endings = fix_sentence_endings
self.break_long_words = break_long_words
+ self.drop_whitespace = drop_whitespace
# -- Private methods -----------------------------------------------
@@ -140,7 +144,7 @@
'use', ' ', 'the', ' ', '-b', ' ', 'option!'
"""
chunks = self.wordsep_re.split(text)
- chunks = filter(None, chunks)
+ chunks = filter(None, chunks) # remove empty chunks
return chunks
def _fix_sentence_endings(self, chunks):
@@ -228,7 +232,7 @@
# First chunk on line is whitespace -- drop it, unless this
# is the very beginning of the text (ie. no lines started yet).
- if chunks[-1].strip() == '' and lines:
+ if self.drop_whitespace and chunks[-1].strip() == '' and lines:
del chunks[-1]
while chunks:
@@ -249,7 +253,7 @@
self._handle_long_word(chunks, cur_line, cur_len, width)
# If the last chunk on this line is all whitespace, drop it.
- if cur_line and cur_line[-1].strip() == '':
+ if self.drop_whitespace and cur_line and cur_line[-1].strip() == '':
del cur_line[-1]
# Convert current line back to a string and store it in list
Modified: python/trunk/Misc/NEWS
==============================================================================
--- python/trunk/Misc/NEWS (original)
+++ python/trunk/Misc/NEWS Tue Mar 13 19:15:41 2007
@@ -168,6 +168,9 @@
Library
-------
+- Patch #1581073: add a flag to textwrap that prevents the dropping of
+ whitespace while wrapping.
+
- Patch #1603688: ConfigParser.SafeConfigParser now checks values that
are set for invalid interpolation sequences that would lead to errors
on reading back those values.
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