python - Using generators to read two files in time priority -

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i read on generators , wondering how use generators in this:
there 2 files , each file has time column. each file sorted ascending time, , i'm looking grab lines in these files using time priority. instead of writing unsophisticated expression(see below) wondering if creating generator next() better/appropriate way read these 2 files in time priority. 

for line1 in file1:         do_something     try:         if time1<time2:             do_something                 continue         else:             do_something       except:         pass       line2 in file2:         do_something           if time2>time1:             break

use heapq.merge

def generate_timeline(file):     line in file:          time1 = extract_time_from_line(line)          yield time1, line   (time1, line) in heapq.merge(generate_timeline(file1), generate_timeline(file2)):     process(line)

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