Problems found
I got this error while writing python, and then the solution from online tutorials was almost always - "redefine this variable", which made me look confused!
Then I realized that I had assigned the return None method to a variable, and then manipulated the variable to cause the problem.
for i in range(2000):
read_lines = (read_lines) # That's the problem
print(read_lines)
It doesn't seem to be a problem, but when you run it, it reports an error
>>TypeError: 'NoneType' object is not subscriptable
Later, I found out that this function returns None, but I assigned it to read_lines, which led to this error in subsequent operations of read_lines, including printing read_lines also reported an error.
This is the code from the random library (see the comment that says return None).
def shuffle(self, x, random=None):
"""
Shuffle list x in place, and return None.
Optional argument random is a 0-argument function returning a
random float in [0.0, 1.0); if it is the default None, the
standard will be used.
"""
if random is None:
randbelow = self._randbelow
for i in reversed(range(1, len(x))):
# pick an element in x[:i+1] with which to exchange x[i]
j = randbelow(i+1)
x[i], x[j] = x[j], x[i]
else:
_int = int
for i in reversed(range(1, len(x))):
# pick an element in x[:i+1] with which to exchange x[i]
j = _int(random() * (i+1))
x[i], x[j] = x[j], x[i]
prescription
Just change the assignment statement in the above line.
for i in range(2000):
(read_lines)
print(read_lines)
content_list = []
summarize
To this point this article on python error TypeError: 'NoneType' object is not subscriptable solution to this article, more related python error TypeError solution content please search my previous posts! or continue to browse the following related articles I hope you will support me more in the future!