【Python爬虫】-5.第五次 字符串分割、索引和切片练习题

# #5.第五次 字符串分割、索引和切片练习题

# 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/dc4c97565c2e'

str2 = str1.split("/")

print('ID=', str2[4])

# 3.设s = "abcdefg"， 则下列值为

# s[3]    'd'

# s[2:4]  'cd'

# s[:5]    'abcde'

# s[3:]    'defg'

# s[::-1]  'gfedcba'

# s[::2]  'aceg'

# 4.定义列表：list1 = [1,2,3,4,5,6,7],则下列值为

list1 = [1,2,3,4,5,6,7]

# list1[3]

print(list1[3])

# list1[2:4]

print(list1[2:4])

# list1[:5]

print(list1[:5])

# list1[3:]

print(list1[3:])

# list1[::-1]

print(list1[::-1])

# list1[2:4]

print(list1[2:4])

# 5.定义元组：touple1 = (1,2,3,4,5,6,7),则下列值为

touple1 = (1,2,3,4,5,6,7)

# touple1[3]          touple1[2:4]

print(touple1[3], touple1[2:4])

# touple1[:5]         touple1[3:]

print(touple1[:5], touple1[3:])

# touple1[::-1]       touple1[::2]

print(touple1[::-1], touple1[::2])