Python | James Tanner

Recovered from the older tannerjc.net wiki snapshot dated January 23, 2016.

MAIN

Simple examples

iterating two lists at the same time

    nfc = [Packers, 49ers]
    afc = [Ravens, Patriots]

    for teama, teamb in zip(nfc, afc):
        print teama +  vs.  + teamb

     Packers vs. Ravens
     49ers vs. Patriots

iterate through list with index

    teams = [Packers, 49ers, Ravens, Patriots]
    for index, team in enumerate(teams):
        print index, team

     0 Packers
     1 49ers
     2 Ravens
     3 Patriots

list comprehension

    numbers = [1,2,3,4,5,6]
    even = [number for number in numbers if number%2 == 0]

dictionary comprehension

    teams = [Packers, 49ers, Ravens, Patriots]
    print {key: value for value, key in enumerate(teams)}
     {'49ers': 1, 'Ravens': 2, 'Patriots': 3, 'Packers': 0}

test for dictionary key

    data = {'user': 1, 'name': 'Max', 'three': 4}
    is_admin = data.get('admin', False)

list comprehension

    x = [1,2,3,4,5,6]

    #First 3
    print x[:3]
     [1,2,3]

    #Middle 4
    print x[1:5]
     [2,3,4,5]

    #Last 3
    print x[-3:]
     [4,5,6]

    #Odd numbers
    print x[::2]
     [1,3,5]

    #Even numbers
    print x[1::2]
     [2,4,6]

combinations with itertools

    from itertools import combinations

    teams = [Packers, 49ers, Ravens, Patriots]
    for game in combinations(teams, 2):
    print game

     ('Packers', '49ers')
     ('Packers', 'Ravens')
     ('Packers', 'Patriots')
     ('49ers', 'Ravens')
     ('49ers', 'Patriots')
     ('Ravens', 'Patriots')

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