python time方法疑惑

ajieup

time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
time.strftime("%Y-%m-%d %H:%M:%S")
为什么这两个执行结果是一样的呢

kof21411

因为time.strftime("%Y-%m-%d %H:%M:%S")默认调用参数就是time.localtime()

gentlespider

看源码

[Python] 纯文本查看 复制代码

def strftime(format, p_tuple=None): # real signature unknown; restored from __doc__
    """
    strftime(format[, tuple]) -> string
    
    Convert a time tuple to a string according to a format specification.
    See the library reference manual for formatting codes. When the time tuple
    is not present, current time as returned by localtime() is used.
    

这句话的意思是，当时间元组（也就是第二个参数）不存在，则使用localtime()返回的当前时间。