1、列表生成器
for num in range(3):
print (num)
print ("````````````````")
for num in range(2,5):
print (num)
print ("``````(1~9 中的 隔两位打印一次)```````")
num = list(range(1,10,2))
print (num)
2、切片
list = list(range(10))
print (list)
print (list[:])
print (list[1:4])
print (list[:2])
print (list[-3:-1])
print (list[-6:])
cp_list = list[:]
print (cp_list)