f = open(file='兼职utf8.txt',mode='r+',encoding='utf-8')
data= f.read() #读取
old = '北京'
new = '上海'
data= data.replace(old,new)
f.seek(0)
f.write(data)
f = open(file='兼职utf8.txt',mode='r+',encoding='utf-8')
data= f.read() #读取
old = '北京'
new = '上海'
data= data.replace(old,new)
f.seek(0)
f.write(data)
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