这个问题对我来说真的很混乱。窗帘后面究竟发生了什么？为什么后者没有工作？
>>> [] = ''
>>> () = ''
File "<stdin>", line 1
SyntaxError: can't assign to ()
我的理论是右边必须有一个对象或可迭代对象，它的值/ s被分配给左侧容器中的变量数。这个想法基于：
>>> [a] = '1'
>>> [a,b] = '12'
>>> a
'1'
>>> b
'2'
>>> [a,b] = '123'
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: too many values to unpack
>>> [a] = ''
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: need more than 0 values to unpack
在元组中也是如此：
>>> (a,) = '1'
>>> (a,b) = '12'
>>> a
'1'
>>> b
'2'
>>> (a,b) = '123'
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: too many values to unpack
>>> (a,) = ''
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: need more than 0 values to unpack
但是有些东西我错过了因为失败了：
>>> [] = ''
>>> () = ''
File "<stdin>", line 1
SyntaxError: can't assign to ()
发生了什么打破后者的任务？