n = open("file.txt","r")
n_new = open("file.txt.mew","w")
name = "上海"
name1 = "北京"
for i in n:
if "北京" in i:
i = i.replace(name1,name)
n_new.write(i)
n.close()
n_new.close()
n = open("file.txt","r")
n_new = open("file.txt.mew","w")
name = "上海"
name1 = "北京"
for i in n:
if "北京" in i:
i = i.replace(name1,name)
n_new.write(i)
n.close()
n_new.close()