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What does error TypeError: 'NoneType' object is not iterable mean? I am getting it on this Python code: def write_file(data, filename): # creates file and writes list to it...
My editor warns me when I compare my_var == None, but no warning when I use my_var is None. I did a test in the Python shell and determined...
This was my source I started with. My List L = [0, 23, 234, 89, None, 0, 35, 9] When I run this : L = filter(None, L) I...
I keep getting an error that says AttributeError: 'NoneType' object has no attribute 'something' The code I have is too long to post here. What general scenarios would cause...
I have a method that sometimes returns a NoneType value. So how can I question a variable that is a NoneType? I need to use if method, for example...
I need a way to get a dictionary value if its key exists, or simply return None, if it does not. However, Python raises a KeyError exception if you...
This question already has answers here: Python `if x is not None` or `if not x is None`?...
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