Generates 15 minute sessions times when given an interval in time.

gen_sessions.py

def sessions(starth, startmin, endh, endmin):
    """
    starth: start hour, 24 hr
    startm: start minute
    endh: end hour, 24 hr
    endmin: end minute
    """
    curh = starth
    curmin = startmin
    while curh < endh or curmin< endmin:
        h12 = curh
        suffix = 'am'
        
        if h12 >=12:
            suffix = 'pm'
            
        if h12 > 12:
            h12 -= 12   
            
        print '%d:%02d %s session'%(h12, curmin, suffix)
        
        curmin += 15
        if curmin >= 60:
            curh += 1
            curmin = 0