批量重命名

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from os import system, popen

originPostFix = 'js'
toPostFix = 'ts'
ans = popen(f'find . -name "*.{originPostFix}" ')
for i in ans.read().split('\n'):
    if not i:
        continue
    system(f'mv {i} {i.replace(originPostFix, toPostFix)}')