Вычислите, сколько слов в заданном списке имеют длину 2

print(len([х for x in list_  if len(x) == 2]))

print(sum([х for x in list_  if x > 0 ]))

list_ = ['a','aa','aaa','aa']
print(len([х for x in list_ if len(x) == 2]))
 
 
Traceback (most recent call last):
  File "D:/python/jgghgj.py", line 2, in <module>
    print(len([х for x in list_ if len(x) == 2]))
  File "D:/python/jgghgj.py", line 2, in <listcomp>
    print(len([х for x in list_ if len(x) == 2]))
NameError: name 'х' is not defined

list_ = ['a','aa','aaa','aa']
print(sum(1 for x in list_ if len(x) == 2))

list_ = [1,1,1,1,-1,-1]
print(sum(х for x in list_ if x > 0))
 
Traceback (most recent call last):
  File "D:/python/jgghgj.py", line 2, in <module>
    print(sum(х for x in list_ if x > 0))
  File "D:/python/jgghgj.py", line 2, in <genexpr>
    print(sum(х for x in list_ if x > 0))
NameError: name 'х' is not defined

print(len([x for x in list_ if len(x) == 2]))

>>> list_ = ['a','aa','aaa','aa']
>>> x = (1 for x in list_ if len(x) == 2)
>>> type(x)
<class 'generator'>
>>> x = [1 for x in list_ if len(x) == 2]
>>> type(x)
<class 'list'>
>>>