Python中最常用的操作列表的几种方法归纳

number = [1, 2, 3, 4]
number.append(5) # number = [1, 2, 3, 4, 5]
number.append([6,7]) # number = [1, 2, 3, 4, 5, [6, 7]]
number.append({'a':'b'}) # number = [1, 2, 3, 4, [6, 7], {'a', :'b'}

a = [1, 2, 3]
b = [4, 5, 6]
c = a + b # c = [1, 2, 3, 4, 5, 6]

a = [1, 2, 3]
b = [4, 5, 6]
a.extend(b) # a = [1, 2, 3, 4, 5, 6]

a = [1, 2, 3, 3,2, 1]
b = list(set(a)) # b = [1, 2, 3]

a = [1, 2, 2, 3, 1, 3]
b = {}.fromkeys(a).keys() # b = [1, 2, 3]