import sys

def copy(src_fname, dst_fname): src_fobj = open(src_fname, 'rb') dst_fobj = open(dst_fname, 'wb') while True: data = src_fobj.read(4096) if not data: break dst_fobj.write(data) src_fobj.close() dst_fobj.close() copy(sys.argv[1], sys.argv[2]) # 执行方式 # cp_func.py /etc/hosts /tmp/zhuji.txt