issublist.py

def issublist(sublist, superlist):
    if not sublist:
        return True

    idx = 0
    first = sublist[0]
    cnt = len(sublist)
    while True:
        try:
            idx = superlist[idx + 1:].index(first) + idx + 1
        except ValueError:
            return False
        if sublist == superlist[idx:idx + cnt]:
            return True