Python程序里的注释是很重要的.它们可以用自然语言告诉你某段代码的功能是什么.在你想要临时移除一段代码时,你还可以用注解的方式将这段代码临时禁用.接下来的练习将让你学会注释 : # A comment, this is so you can read your program later.# Anything after the # is ignored by python.print "I could have code like this." # and the comment
add by zhj: 在Python文档中清楚的说明了默认参数是怎么工作的,如下 "Default parameter values are evaluated when the function definition is executed. This means that the expression is evaluated once, when the function is defined, and that the same “pre-computed” value is used
Python 获取MD5加密值方法封装 import hashlib def get_md5(s): """获取MD5加密值 :param s: 需要加密的字符串 :return: 密文 """ if s: m = hashlib.md5() if s is str: m.update(s.encode("UTF-8")) else: m.update(str(s).encode("UTF-8")) ret