Class Name is not defined 错误 python

Question

while i doing my python programming came across an error. code is given below.

import skfuzzy as fuzz
from skfuzzy import control as ctrl
f =fuzzy_()
print(f)
class fuzzy_:
    def __init__(self):
        pass
    def values(self,t = None, m = None, p = None):

"the class name fuzzy_is not defined". Error shown.

Please help.

Answer 1

You need to reorder it like this:

import skfuzzy as fuzz
from skfuzzy import control as ctrl

class fuzzy_:
    def __init__(self):
        pass
    def values(self,t = None, m = None, p = None):

# First define the class
# Then instantiate it
f = fuzzy_()
print(f)

The python interpreter needs to find the class definition first while reading in the code from top-down. In your code example, the interpreter tried instantiating fuzzy_ class object, but threw error as till then it had no idea of what fuzzy_() is.

Answer 2

python interpreter reads from top to bottom, you are calling the instance of class before defining the class, move line 3 and 4 to the bottom after declaring the class and it should be fine.