list comprehension¶

In [1]:

s= "Name1=Value1;Name2=Value2;Name3=Value3"
dict(item.split("=") for item in s.split(";"))

Out[1]:

{'Name1': 'Value1', 'Name2': 'Value2', 'Name3': 'Value3'}

The map function¶

In [4]:

sq = lambda x:x**2
num_list = [0,1,2,3,4,5,6,7,8,9]
list(map(sq,num_list))

Out[4]:

[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]

In [11]:

list(filter(lambda n:n>0, [0,-1,3,-20]))

Out[11]:

[3]

In [10]:

list(filter(lambda n:n, [True, True, True, False, True, True]))

Out[10]:

[True, True, True, True, True]

In [1]:

my_unfiltered_list = [True, True, True, False, True, True, "hello"]
list(filter(lambda n:type(n)!= bool, my_unfiltered_list))

Out[1]:

['hello']

In [ ]:

from itertools import product

a = ["foo", "melon"]
b = [True, False]
c = [1,2,3]
list(product(a, b, c))

In [8]:

import itertools
list(itertools.starmap(pow,[(2,2),(3,2),(4,2)]))

Out[8]:

[4, 9, 16]

In [ ]: