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For the context and unified diff functions: 

* Simplified test for visible changes
* Improved variable names and line spacing
* Replaced dict(a=3) style with Py2.2 compatable {'a':3}
This commit is contained in:
Raymond Hettinger 2003-06-08 19:38:42 +00:00
parent 305908cffd
commit 7f2d302a16
1 changed files with 9 additions and 15 deletions
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24
Lib/difflib.py
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@ -1205,38 +1205,32 @@ def context_diff(a, b, fromfile='', tofile='',
"""
started = False
prefixmap = dict(insert='+ ', delete='- ', replace='! ', equal=' ')
prefixmap = {'insert':'+ ', 'delete':'- ', 'replace':'! ', 'equal':' '}
for group in SequenceMatcher(None,a,b).get_grouped_opcodes(n):
if not started:
yield '*** %s %s%s' % (fromfile, fromfiledate, lineterm)
yield '--- %s %s%s' % (tofile, tofiledate, lineterm)
started = True
yield '***************%s' % (lineterm,)
if group[-1][2] - group[0][1] >= 2:
yield '*** %d,%d ****%s' % (group[0][1]+1, group[-1][2], lineterm)
else:
yield '*** %d ****%s' % (group[-1][2], lineterm)
empty = True
for tag, i1, i2, j1, j2 in group:
if tag == 'replace' or tag == 'delete':
empty = False
break
if not empty:
for tag, i1, i2, j1, j2 in group:
visiblechanges = [e for e in group if e[0] in ('replace', 'delete')]
if visiblechanges:
for tag, i1, i2, _, _ in group:
if tag != 'insert':
for line in a[i1:i2]:
yield prefixmap[tag] + line
if group[-1][4] - group[0][3] >= 2:
yield '--- %d,%d ----%s' % (group[0][3]+1, group[-1][4], lineterm)
else:
yield '--- %d ----%s' % (group[-1][4], lineterm)
empty = True
for tag, i1, i2, j1, j2 in group:
if tag == 'replace' or tag == 'insert':
empty = False
break
if not empty:
for tag, i1, i2, j1, j2 in group:
visiblechanges = [e for e in group if e[0] in ('replace', 'insert')]
if visiblechanges:
for tag, _, _, j1, j2 in group:
if tag != 'delete':
for line in b[j1:j2]:
yield prefixmap[tag] + line