def print_names(names):
for name in names:
print(names)
names = None
print_names(names)
Error trace:
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-26-481a76948b73> in <cell line: 6>()
4
5 names = None
----> 6 print_names(names)
<ipython-input-26-481a76948b73> in print_names(names)
1 def print_names(names):
----> 2 for name in names:
3 print(names)
4
5 names = None
TypeError: 'NoneType' object is not iterable
Reason for the TypeError
As you can see, the names variable is declared as type None, you cannot iterate over None types in Python.
Fix:
It is better to first check if the type is not None before iterating.
def print_names(names):
if(names is None):
print("Names list is empty...")
else:
for name in names:
print(names)
names = None
print_names(names)
Output: Names list is empty...
Facing issues? Have Questions? Post them here! I am happy to answer!
Author Info:
Rakesh (He/Him) has over 14+ years of experience in Web and Application development. He is the author of insightful How-To articles for Code2care.
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