Python - find occurrences of list of strings within string

Question

I have a large string and a list of search strings and want to build a boolean list indicating whether or not each of the search strings exists in the large string. What is the

Answer 1

My version using regular expressions:

def check_strings(search_strings, input_string):
    regexp = re.compile('|'.join([re.escape(x) for x in search_strings]))
    found = set(regexp.findall(input_string))
    return [x in found for x in search_strings]

On the test data provided by original poster it is by an order of magnitude slower than Rob's pretty solution, but I'm going to do some benchmarking on a bigger sample.