day9.md

第九天

索引

• Python标准库--difflib
• Python好的文章Python版本管理依赖的最终方案
• Python代码片段
• Python读书--Python cookbook day2
• Python框架相关--Django中的response
• Python项目相关--project-based-learning
• Python之外--git的技巧

python标准库 difflib

1. Differ

import difflib

d = difflib.Differ()
diff = d.compare(text1_lines, text2_lines)
print('\n'.join(diff))


diff = difflib.unified_diff(
    text1_lines,
    text2_lines,
    lineterm='',
)

2. SequenceMatcher

from difflib import SequenceMatcher


def show_results(match):
    print('  a    = {}'.format(match.a))
    print('  b    = {}'.format(match.b))
    print('  size = {}'.format(match.size))
    i, j, k = match
    print('  A[a:a+size] = {!r}'.format(A[i:i + k]))
    print('  B[b:b+size] = {!r}'.format(B[j:j + k]))


A = " abcd"
B = "abcd abcd"

print('A = {!r}'.format(A))
print('B = {!r}'.format(B))

print('\nWithout junk detection:')
s1 = SequenceMatcher(None, A, B)
match1 = s1.find_longest_match(0, len(A), 0, len(B))
show_results(match1)

print('\nTreat spaces as junk:')
s2 = SequenceMatcher(lambda x: x == " ", A, B)
match2 = s2.find_longest_match(0, len(A), 0, len(B))
show_results(match2)