find duplicate

find_duplicate.py

def find_duplicate(seq):
    # holds our duplicate list
    duplicate_bucket = []
    # helps to identify a duplicate
    seen_bucket = set()
    for item in (seq):
        if item not in seen_bucket:
            seen_bucket.add(item)
        else:
            duplicate_bucket.append(item)
    return duplicate_bucket


def find_dup(counter, next_element, seen_bucket, bucket):
    """
    recursive function to find duplicate
    based on a generator
    """
    el = next_element.next().group()
    if el not in seen_bucket:
        seen_bucket.add(el)
    else:
        bucket.append(el)
    counter -= 1
    if counter > 0:
        return find_dup(counter, next_element, seen_bucket, bucket)
    return seen_bucket, bucket