'''集合'''s = {3,2,3,5}print(len(s))s.add(6)print(s)
#
'''列表'''m =[1,3,4,1]print(len(m))m.append(7)print(m)#
'''字典'''d = {'dogs':5, 'cats':4}print(len(d))print(d["dogs"])d["pigs"]=7print(d.keys())print(d.values())from numpy import array
'''数组Numpy Arrays'''
a =array([1,2,3,4])
b = a+2
print(a)
print(b)
'''循环loop'''
line = '1,3,3,4,5'
l = sum([int(field) for field in line.split(',')])
print(l)
