Ara Kooser wrote:
> Hello all,
>
> I am working on trying to understand classes by creating a
> character generator for a rpg. I know I am doing something silly but I
> am not sure what. When I run the program I and type no when prompted I
> get the following message:
> Traceback (most recent call last):
> File "/Users/ara/Documents/ct_generator.py", line 10, in <module>
> class Main:
> File "/Users/ara/Documents/ct_generator.py", line 68, in Main
> reroll()
> File "/Users/ara/Documents/ct_generator.py", line 53, in reroll
> upp()
> NameError: global name 'upp' is not defined
>
> I guess it doesn't recognize that I want to call the function upp()
> again. I think I might be using the wrong syntax here. My code is
> below. Thank you any help or guidance.
In Python, if you want to call an object method, you have to do so
explicitly via the object. Otherwise, it looks for a local/global
variable of the same name.
For example,
def foo():
print "I am foo!"
class Foo(object):
def __init__(self):
pass
def foo(self):
print "I am Foo.foo"
def display(self):
self.foo()
foo()
>>> x=Foo()
>>> x.display()
I am Foo.foo
I am foo!
All objects methods are passed the object instance explicitly as their
first argument. It's conventionally called "self" (similar to the "this"
pointer in C++ if you're familiar with it).
Let me know if there's something that's not clear.
--
~noufal
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