Python学习笔记（2）列表

#encoding=gbk

cities = ['beijing','nanjing','xian','shanghai','chengdu','jinan','chongqing']
for city in cities:  #遍历列表
    print(city)
    print(city.title())
    print('\n')
print('betautifull')

for value in range(1,9):  #打印1,2,3,4,5,6,7,8
    print(value)

numbers = list(range(1,9))
print(numbers)            #[1, 2, 3, 4, 5, 6, 7, 8]
even_numbers = list(range(1,10,2))
print(even_numbers)   #[1, 3, 5, 7, 9]

squares = []
for value in range(1,10):
    square = value ** 2
    squares.append(square) 
print(squares)
print(min(squares))
print(max(squares))
print(sum(squares))

squares = [value ** 2 for value in range(1,10)]
squares.sort(reverse=True)
print(sorted(squares))  #[1, 4, 9, 16, 25, 36, 49, 64, 81]
print(squares)          #[81, 64, 49, 36, 25, 16, 9, 4, 1]


print(cities[0:3])   #取出列表中第1-4元素
print(cities[:3])    
print(cities[2:])

for city in cities[:3]:
    print(city.title())
    
squares2 = squares[:]
print(squares2)