Python编程从入门到实践笔记——操作列表
#coding=utf-8
magicians = ['alice','david','carolina']
#遍历整个列表
for magician in magicians :
print(magician)
print("hello everyone!") #for循环（冒号和缩进）
for number in range(1,6):
print(number) #用range()创建数字列表
#list()、range()前闭后开
numbers = list(range(1,6))
print(numbers) #range()设置步长
even_numbers = list(range(2,21,2))
print(even_numbers) #**表示乘方
squares=[]
for value in range(1,51):
squares.append(value**2)
print(squares) #数字列表统计
digits = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
print("min="+str(min(digits)))
print("max="+str(max(digits)))
print("sum="+str(sum(digits))) #列表解析
squares_1 = [value**2 for value in range(1,10)]
print(squares_1) #切片 和range()范围一样，前闭后开
#不指定起始索引，从列表开头开始
#不指定终止索引，终止于列表末尾
players=['jordan','james','magic','kobe','yao','bill']
print(players[0:3])
print(players[:1])
print(players[3:]) #打印最后三名运动员
print(players[-3:]) #复制列表:省略起始索引和终止索引
players_1=players[:]
players.append('wade')
players_1.append('paul')
print(players)
print(players_1) #players_1=players,players赋值给players_1，和Java中数组赋值一样，指向的是同一个对象，操作的是同一个对象 #元组（）不可以更改其中元素的值，可以改变元组变量的值
dimensions=(100,80)
print(dimensions[0])
print(dimensions[1]) dimensions=(80,80)
print(dimensions[0])
print(dimensions[1])