import itertools
 
def find_sublists(seq, sublist):
    length = len(sublist)
    for index, value in enumerate(seq):
        if value == sublist[0] and seq[index:index+length] == sublist:
            yield index, index+length
 
def replace_sublist(seq, target, replacement, maxreplace=None):
    sublists = list(find_sublists(seq, target))
    if maxreplace:
        sublists = itertools.islice(sublists, maxreplace)
    for start, end in sublists:
        seq[start:end] = replacement
 
seq = [3, 5, 10, 3, 5, 10]
target = [3, 5, 10]
replacement = [9, 7]
 
replace_sublist(seq, target, replacement)
 
print(seq)

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