这很容易做到：
with open('file') as f: seen = set() for line in f: line_lower = line.lower() if line_lower in seen: print(line) else: seen.add(line_lower)
这很容易做到：
with open('file') as f: seen = set() for line in f: line_lower = line.lower() if line_lower in seen: print(line) else: seen.add(line_lower)名师互学网 版权所有 (c)2021-2022 ICP备案号：晋ICP备2021003244-6号
