CODEWITHSUNDEEP
python
user805981
user805981

Reputation: 11059

NameError: global name 'reverse' is not defined

New to python.... really confused with this weird error.... I don't think I'm doing anything wrong, am I?

main.py

from methods import Reverse

def main ():

    b = [1,2,3,4,5,6,6,7,8,8,9,1,212,312,31,23,123455435,56,56,123]
    a = "llaa"

    thing = Reverse()
    print thing.reverse(a)


main()

methods.py

class Reverse():

  def __init__(self):
    print "initialized reverse"

  def reverse(self,var):
    if var == "":
      return var
    else: 
      print var[-1] + reverse(var[:-1])

I'm trying to do a recursive call with reverse.... Please kindly help. Thanks!

Upvotes: 1

Views: 5822

Answers (2)

Ric
Ric

Reputation: 8805

Unlike some other languages where this is implied, Python requires you to explicitly say self whenever using instance methods or variables so in Reverse you need to explicitly say

self.reverse(var[:-1])

Of course reverse does not return anything so you need to change it to

return var[-1] + self.reverse(var[:-1])

Upvotes: 4

poke
poke

Reputation: 388123

In your class Reverse, reverse is a method, so you need to call it as a method:

print var[-1] + self.reverse(var[:-1])

Note the self.

Upvotes: 4

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