CODEWITHSUNDEEP
pythonoop
m2rt
m2rt

Reputation: 157

OOP python program

from collections import Counter

class Runlength:
    def __init__(self):
        self.str = 0 

    def returner(self,str):
        self.str = str 
        self.__str = ','.join(str(n) for n in self.__str)
        self.__str = self.__str[::-1]
        self.__str = self.__str.replace(',', '')
        return self.__str
    def final(self,num):
        self.num = num 
        k = []
        c = Counter(self.num).most_common()
        for x in c:
        k += x     
        return k
math = Runlength() 

def Main():
a = "aabbcc"
b = math.returner(a)
c = math.final(b)
print(c)
Main()

The program takes a word as input and gives the occurrence of each repeating character and outputs that number along with a single character of the repeating sequence.

I cant figure it out, why this doesn't work. I get this error:

NameError: global name 'returner' is not defined

Upvotes: 1

Views: 139

Answers (3)

mikhdm
mikhdm

Reputation: 99

I got this error with your code:

self.__str = ','.join(str(n) for n in self.__str)
AttributeError: Runlength instance has no attribute '_Runlength__str'

Maybe you mean:

self.__str = ','.join(str(n) for n in self.str

And choose input argument for returner() method as str_ not str, cause str -- is the name of python built-in type, so better to not choose variable names with built-in type names. So after this changes I got this output:

['a', 2, 'c', 2, 'b', 2]

So my python version is 2.7.3 and error you've got does not appear with my python version. What python version you use to compile your code? If this python3 it works fine too.So try this code, it works fine for me:

from collections import Counter

class Runlength:
    def __init__(self):
        self.str = 0

    def returner(self,str_):
        self.string = str_
        self.__str = ','.join(str(n) for n in self.string)
        self.__str = self.__str[::-1]
        self.__str = self.__str.replace(',', '')
        return self.__str
    def final(self,num):
        self.num = num
        k = []
        c = Counter(self.num).most_common()
        for x in c:
            k += x
        return k
math = Runlength()

def Main():
    a = "aabbcc"
    b = math.returner(a)
    c = math.final(b)
    print(c)
Main()

Upvotes: 1

sshashank124
sshashank124

Reputation: 32189

The problem is that in Main() you are not accessing the global (outside the scope of the Main() method) math variable. Instead try initializing your math inside the Main() function

This lets the method know that it should use the global math variable instead of trying to look for a non-existent local one.

Upvotes: 1

Anvesh
Anvesh

Reputation: 625

def Main():
   math = Runlength() 
   a = "aabbcc"
   b = math.returner(a)
   c = math.final(b)
   print(c)
Main()

This should work fine..

But I observed that the object can even be accessed if it is not declared as global. Is their any explantion for it in the above scenario?

Upvotes: 0

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