# 1.理解索引这个会在之后经常用到
#
# 2.定义字符串、例如：str1 = 'http://www.jianshu.com/u/a987b338c373'字符串内容为自己的首页连接，输出自己的简书id（u/之后的内容--a987b338c373）
str1 = 'http://www.jianshu.com/u/a987b338c373'
print(str1[str1.find('/u/')+len('/u/'):])
# 3.设s = "abcdefg"， 则下列值为
# s[3] s[2:4]
# 'd' 'cd'
# s[:5] s[3:]
# 'abcde' 'defg'
# s[::-1] s[::2]
# 'gfedcba' 'aceg'
s='abcdefg'
print(s[3],s[2:4])
print(s[:5] , s[3:])
print(s[::-1] , s[::2])
# 4.定义列表：list1 = [1,2,3,4,5,6,7],则下列值为
# list1[3] list1[2:4]
# 4 [3,4]
list1=[1,2,3,4,5,6,7]
print(list1[3],list1[2:4])
# list1[:5] list1[3:]
# [1,2,3,4,5] [4,5,6,7]
print(list1[:5],list1[3:])
# list1[::-1] list1[::2]
# [7,6,5,4,3,2,1] [1,3,5,7]
print(list1[::-1],list1[::2])
# 5.定义元组：touple1 = (1,2,3,4,5,6,7),则下列值为
# touple1[3] touple1[2:4]
# 4 (3,4)
touple1 = (1,2,3,4,5,6,7)
print(touple1[3],touple1[2:4])
# touple1[:5] touple1[3:]
# (1,2,3,4,5) (4,5,6,7)
print(touple1[:5],touple1[3:])
# touple1[::-1] touple1[::2]
# (7,6,5,4,3,2,1) (1,3,5,7)
print(touple1[::-1],touple1[::2])
# 6.对之前学习过得集中基本类型及其方法进行复习，重中之重理解索引和切片
网友评论