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Cleanup and modernize code prior to working on Issue 11747.

This commit is contained in:
Raymond Hettinger 2011-04-10 17:14:56 -07:00
parent bed9a5b6b3
commit 47e120e70c
1 changed files with 27 additions and 26 deletions
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53
Lib/difflib.py
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@ -1188,22 +1188,23 @@ def unified_diff(a, b, fromfile='', tofile='', fromfiledate='',
started = False
for group in SequenceMatcher(None,a,b).get_grouped_opcodes(n):
if not started:
fromdate = '\t%s' % fromfiledate if fromfiledate else ''
todate = '\t%s' % tofiledate if tofiledate else ''
yield '--- %s%s%s' % (fromfile, fromdate, lineterm)
yield '+++ %s%s%s' % (tofile, todate, lineterm)
started = True
i1, i2, j1, j2 = group[0][1], group[-1][2], group[0][3], group[-1][4]
yield "@@ -%d,%d +%d,%d @@%s" % (i1+1, i2-i1, j1+1, j2-j1, lineterm)
fromdate = '\t{}'.format(fromfiledate) if fromfiledate else ''
todate = '\t{}'.format(tofiledate) if tofiledate else ''
yield '--- {}{}{}'.format(fromfile, fromdate, lineterm)
yield '+++ {}{}{}'.format(tofile, todate, lineterm)
first, last = group[0], group[-1]
i1, i2, j1, j2 = first[1], last[2], first[3], last[4]
yield '@@ -{},{} +{},{} @@{}'.format(i1+1, i2-i1, j1+1, j2-j1, lineterm)
for tag, i1, i2, j1, j2 in group:
if tag == 'equal':
for line in a[i1:i2]:
yield ' ' + line
continue
if tag == 'replace' or tag == 'delete':
if tag in {'replace', 'delete'}:
for line in a[i1:i2]:
yield '-' + line
if tag == 'replace' or tag == 'insert':
if tag in {'replace', 'insert'}:
for line in b[j1:j2]:
yield '+' + line
@ -1252,38 +1253,38 @@ def context_diff(a, b, fromfile='', tofile='',
four
"""
prefix = dict(insert='+ ', delete='- ', replace='! ', equal=' ')
started = False
prefixmap = {'insert':'+ ', 'delete':'- ', 'replace':'! ', 'equal':' '}
for group in SequenceMatcher(None,a,b).get_grouped_opcodes(n):
if not started:
fromdate = '\t%s' % fromfiledate if fromfiledate else ''
todate = '\t%s' % tofiledate if tofiledate else ''
yield '*** %s%s%s' % (fromfile, fromdate, lineterm)
yield '--- %s%s%s' % (tofile, todate, lineterm)
started = True
fromdate = '\t{}'.format(fromfiledate) if fromfiledate else ''
todate = '\t{}'.format(tofiledate) if tofiledate else ''
yield '*** {}{}{}'.format(fromfile, fromdate, lineterm)
yield '--- {}{}{}'.format(tofile, todate, lineterm)
yield '***************%s' % (lineterm,)
if group[-1][2] - group[0][1] >= 2:
yield '*** %d,%d ****%s' % (group[0][1]+1, group[-1][2], lineterm)
first, last = group[0], group[-1]
yield '***************{}'.format(lineterm)
if last[2] - first[1] > 1:
yield '*** {},{} ****{}'.format(first[1]+1, last[2], lineterm)
else:
yield '*** %d ****%s' % (group[-1][2], lineterm)
visiblechanges = [e for e in group if e[0] in ('replace', 'delete')]
if visiblechanges:
yield '*** {} ****{}'.format(last[2], lineterm)
if any(tag in {'replace', 'delete'} for tag, _, _, _, _ in group):
for tag, i1, i2, _, _ in group:
if tag != 'insert':
for line in a[i1:i2]:
yield prefixmap[tag] + line
yield prefix[tag] + line
if group[-1][4] - group[0][3] >= 2:
yield '--- %d,%d ----%s' % (group[0][3]+1, group[-1][4], lineterm)
if last[4] - first[3] > 1:
yield '--- {},{} ----{}'.format(first[3]+1, last[4], lineterm)
else:
yield '--- %d ----%s' % (group[-1][4], lineterm)
visiblechanges = [e for e in group if e[0] in ('replace', 'insert')]
if visiblechanges:
yield '--- {} ----{}'.format(last[4], lineterm)
if any(tag in {'replace', 'insert'} for tag, _, _, _, _ in group):
for tag, _, _, j1, j2 in group:
if tag != 'delete':
for line in b[j1:j2]:
yield prefixmap[tag] + line
yield prefix[tag] + line
def ndiff(a, b, linejunk=None, charjunk=IS_CHARACTER_JUNK):
r"""