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Exception has occurred: NameError name 'self' is not defined

Purple Peacock answered on October 29, 2020 Popularity 10/10 Helpfulness 2/10

answer Exception has occurred: NameError name 'self' is not defined

related name 'self' is not defined

Exception has occurred: NameError name 'self' is not defined

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"""
Default argument values are evaluated at function define-time,
but self is an argument only available at function call time.
This arguments in the argument list cannot refer each other.
It's a common pattern to default an argument to None and add
a test for that in code:
"""
def p(self, b=None):
    if b is None:
        b = self.a
    print b

Popularity 10/10 Helpfulness 2/10 Language python

Source: stackoverflow.com

Tags: defined exception nameerror python

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Contributed on Oct 29 2020

Purple Peacock

0 Answers Avg Quality 2/10

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name 'self' is not defined

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class A:
    def __init__(self, a):
        self.a = a

    def p(self, b=self.a): #Wrong way
        print b
        
    def p(self, b=None):   #Correct way
    	if b is None:
        b = self.a
    	print b

Popularity 10/10 Helpfulness 3/10 Language python

Source: stackoverflow.com

Tags: defined

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Contributed on Nov 08 2021

Markhor

0 Answers Avg Quality 2/10

Exception has occurred: NameError name 'self' is not defined

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Exception has occurred: NameError name 'self' is not defined

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name 'self' is not defined

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