How to remove every occurrence of sub-list from list

by

You’d have to implement it yourself. Here is the basic idea:

def remove_sublist(lst, sub):
    i = 0
    out = []
    while i < len(lst):
        if lst[i:i+len(sub)] == sub:
            i += len(sub)
        else:
            out.append(lst[i])
            i += 1
    return out

This steps along every element of the original list and adds it to an output list if it isn’t a member of the subset. This version is not very efficient, but it works like the string example you provided, in the sense that it creates a new list not containing your subset. It also works for arbitrary element types as long as they support ==. Removing [1,1,1] from [1,1,1,1] will correctly result in [1], as for a string.

Here is an IDEOne link showing off the result of

>>> remove_sublist([1, 'a', int, 3, float, 'a', int, 5], ['a', int])
[1, 3, <class 'float'>, 5]

Leave a Comment