#----------------------------------------------
# PROBLEM 1
#----------------------------------------------
#
# Download the file data.log from:
#
#          http:/www.samyzaf.com/braude/PYTHON/projects/data.log
#
# This file contains time/temparature data as sampled by a thermostat in a sensor unit in one day.
# Write Python code for answering the following questions:
# (a) What are the minimal and maximal temperatures ?
# (b) In what times the minimal temperature was obtained?
# (c) In what times the maximal temperature was obtained?
# (d) What is the average temperature?
#
# Hint:
# Your code should produce the following output:
# Minimal temperature = 17.33
# Maximal temperature = 46.5
# Min times = ['01:51:13', '02:49:36', '19:09:31']
# Max times = ['03:39:20', '07:06:30', '11:20:18', '15:21:09']
# Average temperature = 32.0354964895

#----------------------------------------------
# SOLUTION:
#----------------------------------------------

def solution_1():
    # build a dictionary Tdict that maps time to temperature
    # key=time, value=temperature. key/value pairs are read from the file 'data.log'
    Tdict = dict()
    f = open('data.log', 'r')
    for line in f:
        time, temperature = line.split()   # read what the split() function does to a string
        Tdict[time] = float(temperature)   # we must convert temperature string to float !

    f.close()

    min_temperature = min(Tdict.values())
    max_temperature = max(Tdict.values())
    print "Minimal temperature =", min_temperature
    print "Maximal temperature =", max_temperature

    min_times = []
    max_times = []
    for time in Tdict.keys():
        if Tdict[time] == min_temperature:
            min_times.append(time)
        if Tdict[time] == max_temperature:
            max_times.append(time)

    print "Min times =", min_times
    print "Max times =", max_times
    print "Average temperature =", sum(Tdict.values()) / len(Tdict)


if __name__ == "__main__":

    solution_1()