Home/ Questions/TypeError: ‘NoneType’ object is not iterable. How to fix?
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Dr. Cindy Dooley II
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Asked: 2022-06-13T15:47:12+00:00 In:

TypeError: ‘NoneType’ object is not iterable. How to fix?

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Please help me! I get TypeError: ‘NoneType’ object is not iterable with this code:

countryList =["India","China","Russia","France"]
def getCountryList():
    countryList.append("italy")
 
for country in getCountryList():
    print(country)

When I launch the above program, I received the following results:

TypeError                                 Traceback (most recent call last)
<ipython-input-51-1558beedb4d8> in <module>
      3     countryList.append("italy")
      4
----> 5 for country in getCountryList():
      6     print(country)
 
TypeError: 'NoneType' object is not iterable

Does anyone know why such an error occurs? Please help me fix it.

Thanks.

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1 Answer

  1. Best Answer
    Expert

    The cause: If you try to iterate through a None object in a for or while loop, you’ll make the error TypeError: ‘NoneType’ object is not iterable.

    On your program, countryList is of type None, that is the cause of your error. Because you neglected to return list countryList from getCountryList().

    Solution: 
    In this situation, we must return list countryList from getCountryList() to fix the issue.

    countryList =["India","China","Russia","France"]
def getCountryList():
    countryList.append("Italy")
    return countryList
 
for country in getCountryList():
    print(country,end=' ')
    You will get the following expected output:
    India China Russia France Italy
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