s = open(‘abc.txt‘,‘r‘) u = s.read() s.close() p = ‘‘ for i in u: if i == ‘世‘: i = ‘中‘ p = p + i continue if i == ‘界‘: i = ‘国‘ p = p + i continue p = p + i print(p) q = open(‘abc.txt‘,‘w‘) q.write(p) q.close()
原文：http://www.cnblogs.com/wumac/p/5737498.html