games = [ [102, 51], [78, 67], [53, 94], [64, 75], [54, 71], [64, 68] ]

# an initial solution

results = []
for p in games:
    if p[0] > p[1]:                # 1. if p meets a condition
       results.append(p)           # 2. record it in our result

# factor out the test as a function

def home_team_won(p):
    return p[0] > p[1]

# and use the function

results = []
for p in games:
    if home_team_won(p):           # 1. if p meets a condition, in a fxn
       results.append(p)           # 2. record it in our result

# filter does all of this -- as long as you give it home_team_won()

results = filter(home_team_won, games)

# like map, filter produces a "filter object" that we can loop over
#
# for r in results:
#     print(r)
#
# ... but it is a "use once" object!