typeerror: 'nonetype' object is not iterable ... This type of error occurs when you try to iterate any objects or variable having or assigned “None” value. For ...
I prefer:for item in data or []:Although it is sorta Perlish, it is compact. If data is iterable, it will be iterated. If not, zero iterations will occur.
19.06.2019 · (a) Confuses NoneType and None (b) thinks that NameError: name 'NoneType' is not defined and TypeError: cannot concatenate 'str' and 'NoneType' objects are the same as TypeError: 'NoneType' object is not iterable (c) comparison between Python and java is "a bunch of unrelated nonsense" –
This error: Python nonetype object is not iterable is caused because our filter_students function does not return a value. When we assign the result of the ...
TypeError: 'NoneType' object is not iterable. I can't see where im going wrong i would like to use this structure to loop through create multiple dataframe and then make a big multiindex of all pairs and time using same kind of loop. I've not been coding long.
In the above example, if data is None , we will get the specified error on the second line where we are iterating over data object. Basically this error means ...
It means that the data variable is passing None (which is type NoneType), its equivalent for nothing. So it can't be iterable as a list, as you are trying to do ...
To solve this error: Python nonetype object is not iterable, we have to return a value in our filter_students function: 1 def filter_students (class_names): 2 new_class_names = [] 3 for c in class_names: 4 if c.startswith ("E"): 5 new_class_names.append (c) 6 return new_class_names. Then, this code returns the value of new_class_names back to ...
def write_file(data, filename): # creates file and writes list to it with open(filename, 'wb') as outfile: writer = csv.writer(outfile) for row in data: ...