Question

我有一个接受字符串，列表和字典的函数

def superDynaParams(myname, *likes, **relatives): # *n is a list and **n is dictionary
    print '--------------------------'
    print 'my name is ' + myname

    print 'I like the following'

    for like in likes:
        print like

    print 'and my family are'

    for key, role in relatives:
        if parents[role] != None:
             print key + ' ' + role

但它返回错误

ValueError：要解压缩的值太多

我的参数是

superDynaParams('Mark Paul',
                'programming','arts','japanese','literature','music',
                father='papa',mother='mama',sister='neechan',brother='niichan')

Answer 1

你正在循环字典：

for key, role in relatives:

但只产生键，所以一次只能产生一个对象。如果要循环键和值，请使用dict.items()方法：

for key, role in relatives.items():

在Python 2上，使用dict.iteritems()方法提高效率：

for key, role in relatives.iteritems():

Answer 2

您应该使用迭代器来迭代项目：

relatives.iteritems()

for relative in relatives.iteritems():
    //do something

ValueError：在Python Dictionary中解压缩的值太多

2 个答案: