function name is undefined in python class
Question:
I am relatively new to python and i am experiencing some issues with namespacing.
class a:
def abc(self):
print "haha"
def test(self):
abc()
b = a()
b.test() #throws an error of abc is not defined. cannot explain why is this so
Answers:
Since test()
doesn’t know who is abc
, that msg NameError: global name 'abc' is not defined
you see should happen when you invoke b.test()
(calling b.abc()
is fine), change it to:
class a:
def abc(self):
print "haha"
def test(self):
self.abc()
# abc()
b = a()
b.abc() # 'haha' is printed
b.test() # 'haha' is printed
In order to call method from the same class, you need the self
keyword.
class a:
def abc(self):
print "haha"
def test(self):
self.abc() // will look for abc method in 'a' class
Without the self
keyword, python is looking for the abc
method in the global scope, that is why you are getting this error.
I am relatively new to python and i am experiencing some issues with namespacing.
class a:
def abc(self):
print "haha"
def test(self):
abc()
b = a()
b.test() #throws an error of abc is not defined. cannot explain why is this so
Since test()
doesn’t know who is abc
, that msg NameError: global name 'abc' is not defined
you see should happen when you invoke b.test()
(calling b.abc()
is fine), change it to:
class a:
def abc(self):
print "haha"
def test(self):
self.abc()
# abc()
b = a()
b.abc() # 'haha' is printed
b.test() # 'haha' is printed
In order to call method from the same class, you need the self
keyword.
class a:
def abc(self):
print "haha"
def test(self):
self.abc() // will look for abc method in 'a' class
Without the self
keyword, python is looking for the abc
method in the global scope, that is why you are getting this error.