以下代码均采用Python 3.5.2编写。新建一个名为HelloWorld.py的文件，当然名字无所谓，输入以下代码：

#filterdef larger100(a):    return a>100for i in filter(larger100,[10,56,101,500]):    print(i)#reducefrom functools import reducedata_list = [1,2,5,7,9]result=reduce(lambda x,y: x+y, data_list)print(result)#Generator Expressiondef gen():    for i in range(4):        yield ifor i in gen():    print(i)gen = (x for x in range(4))for i in gen:    print(i)#List Comprehensionl=[]for i in range(5):    l.append(i**2)print(l)l=[x**2 for x in range(5)]print(l)x1=[1,3,5]y1=[9,12,13]l=[x**2 for (x,y) in zip(x1,y1) if y>10]print(l)#Lazy Evaluationa=range(10)result=map(lambda x:x**2, a)for i in result:    print(i)#itertoolsfrom itertools import *#count(5,2) 5,7,9,11,13,...#cycle("abc") a b c a b c a b ...#repeat(1.2) 1.2 1.2 1.2 ...for i in repeat(10,5):    print(i)for i in chain([1,2,3],[4,5,7]):    print(i)def height_class(h):    if h>180:        return "tall"    elif h<160:        return "short"    else:        return "middle"friends = [191, 158, 159, 165, 170, 177, 181, 182, 190]friends=sorted(friends, key=height_class)print(friends)for m,n in groupby(friends, key=height_class):    print(m)    print(list(n))

方便起见，可将未读到的代码注释掉，一段段阅读运行，查看结果，理解原理。