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.
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 ...
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 ...
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" –
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 ...
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.
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: ...
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 ...
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 ...