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Python

Posted by Grigorij Schleifer
Grigorij Schleifer
10,365 Points

Whats wrong?

Hey folks,

I am stuck and don´t understand the error ... any help is highly appreciated.

My error is :

local variable 'count' referenced before assignment

My code:

count = 0
my_dict = {'apples': 1, 'bananas': 2, 'coconuts': 3}
my_list = ['apples', 'coconuts', 'grapes', 'strawberries']


def members(my_dict, my_list):
    for key in my_list:
        if key in my_dict:
            count =+ 1

    return count

count is assigned before the method call, why do I get this error?

Grigorij

Jennifer Nordell
seal-mask
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

I'm doing this from my iPad so I can't try it in a console, but just out of curiosity... What happens when you change 

count =+ 1

To:

count += 1
Grigorij Schleifer
Grigorij Schleifer
10,365 Points

Hey Jennifer,

thank you for a quick reply. I have done your suggestion and now I get this:

UnboundLocalError: local variable 'count' referenced before assignment

WEIRD

3 Answers

Jeremy Hill
Jeremy Hill
29,567 Points

Try this:

#count = 0
my_dict = {'apples': 1, 'bananas': 2, 'coconuts': 3}
my_list = ['apples', 'coconuts', 'grapes', 'strawberries']


def members(my_dict, my_list):
    count = 0
    for key in my_list:
        if key in my_dict:
            count += 1
    print(count)
    return count

members(my_dict, my_list)
Grigorij Schleifer
Grigorij Schleifer
10,365 Points

Very cool !!!

Thanks everyone !!!

Jeremy Hill
Jeremy Hill
29,567 Points
Jeremy Hill
Jeremy Hill
29,567 Points

I just ran your code and it was fine- no errors.

Jeremy Hill
Jeremy Hill
29,567 Points
Jeremy Hill
Jeremy Hill
29,567 Points

Yes Jennifer is right you should be incrementing count with +=. Make the switch and then try placing your 'count = 0' in your members() method towards the top and see if you get the results that you are expecting.