Call+SMS2.py

def find_sms(number, number_to, start, time_start, time_end):
    for i in range(start, len(source)) :
        entry = source[i]
        if (entry.type == "sms" and
            entry.number == number and
            entry.number_to == number_to and
            entry.time > time_start and
            entry.time < time_end) :
            return entry
        elif entry.time > time_end:
            return None

for i in range(0, len(source)) :
    entry = source[i]
    if entry.type == "call":
        sms = find_sms(entry.number,
                       entry.number_to,
                       i+1,
                       entry.time,
                       entry.time + 5*60)
        if sms != None:
            found_items.append(entry+sms)