map()函数
def format_name(s):
return s.capitalize()
print map(format_name, ['adam', 'LISA', 'barT'])
Result:
['Adam', 'Lisa', 'Bart']
把函数作为参数
1 import math 2 3 def add(x, y, f): 4 return f(x) + f(y) 5 6 print add(25, 9, math.sqrt) 7 8 Result: 9 8.0
reduce()函数
def prod(x, y):
return x*y
print reduce(prod, [2, 4, 5, 7, 12])
Result:
3360
filter()函数
import math
def is_sqr(x):
return int(math.sqrt(x)) ** 2 == x
print([x for x in filter(is_sqr, range(1, 100))])
Result:
[1, 4, 9, 16, 25, 36, 49, 64, 81]
print sorted(['bob', 'about', 'Zoo', 'Credit'], key=lambda x:x.lower())