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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create_institute_numeration_group_regexp_pattern(patterns):
 """Using a list of regexp patterns for recognising numeration patterns for institute preprint references, ordered by length - longest to shortest - create a grouped 'OR' or of these patterns, ready to be used in a bigger regexp. @param patterns: (list) of strings. All of the numeration regexp patterns for recognising an institute's preprint reference styles. @return: (string) a grouped 'OR' regexp pattern of the numeration patterns. E.g.: (?P<num>[12]\d{3} \d\d\d|\d\d \d\d\d|[A-Za-z] \d\d\d) """

    patterns_list = [institute_num_pattern_to_regex(p[1]) for p in patterns]
    grouped_numeration_pattern = u"(?P<numn>%s)" % u'|'.join(patterns_list)
    return grouped_numeration_pattern