[Python] Wrong indexing of a user defined list [closed]

I have a Python class inheriting from Sequence. I implemented __getitem__ and __len__ in a straightforward way. In the main I loop over the elements of the class initialized with a list of two strings:

class MyList(Sequence):
def __init__(self, asset_list):
self.L = asset_list
super().__init__()

def __getitem__(self, indexer):
if isinstance(indexer, int):
return self.L[indexer]
else:
raise Exception

def __len__(self):
return len(self.L)

if __name__ == "__main__":
al = MyList(["hello", "world"])
for x in al:
print(x)


When I run the code from VS Code I get an indexing error: in the for loop the code is trying to access element with index 2 even though the list has length 2. Even stranger, this problem is not present when I run the same code from command line.

Continue reading...