Attempting to append to a list by assigning to an element outside the range of the list leads to IndexError
- IndexError
- append
- list
Common scenario:
lst = []
# let's append one item
lst[0] = 'cbg' # IndexError :(
The full error message is “IndexError: list assignment index out of range”.
The implicit (but wrong) assumption is either that the list will automatically expand to fit the new index, or that lst[len(lst)] = val is somehow special-cased.
The solution is to use list.append instead.