“预期缩进块”错误？

Question

我不明白为什么python会出现“预期的缩进块”错误？

""" This module prints all the items within a list"""
def print_lol(the_list):
""" The following for loop iterates over every item in the list and checks whether
the list item is another list or not. in case the list item is another list it recalls the function else it prints the ist item"""

    for each_item in the_list:
        if isinstance(each_item, list):
            print_lol(each_item)
        else:
            print(each_item)

Answer 1

您必须在函数定义之后缩进文档字符串（第3、4行）：

def print_lol(the_list):
"""this doesn't works"""
    print 'Ain't happening'

缩进：

def print_lol(the_list):
    """this works!"""
    print 'Aaaand it's happening'

或者，您也可以使用#发表评论：

def print_lol(the_list):
#this works, too!
    print 'Hohoho'

此外，您可以看到有关文档字符串的PEP 257。

希望这可以帮助！