day11python基础作业

# 1.str = "  fgh        "   写一个函数，只去掉字符串右侧的空格，左侧的空格保留
# def func():
#     str= "  fgh        "
#     items = str.rstrip()
#     return  items
# print(func())

# 2.输入10个数字到列表中，如果输入的不是数字，则跳过，不存

# def func():
#     b = []
#     for j in range(10):
#         a = input("请输入n：")
#         try:
#             n = int(a)
#             b.append(n)
#         except:
#             a = input("请输入数字n,必须为数字：")
#     print(b)
# func()

# 3.写一个函数，可以判断一个字符串是否为回文例子qwewq，函数返回true或者false
# def is_palind(num):
#     num_len = len(num)
#     index = num_len // 2
#     str1 = num[:index]
#     str2 = num[index:][::-1]
#     if str1 == str2:
#         return True
#     else:
#         return False
# print(is_palind("qwewq"))

# 4.请手写一个函数，可以打印出 I'm "ok" it's your's  注意必须是原样输出
# def func(): #定义函数
#     print('I’m "ok" it’s your’s') #输出
# func() #函数调用

# 5.str2 = "This is the voa special English,health,report"  写一个函数，统计字符串中单词出现的个数，注意是单词而不是字母

# def func():
#     str2 = "This is the voa special English,health,report"
#     c = str2.replace(","," ")
#     a = c.split(" ")
#     b = {}
#     for word in a:
#         if word in b:
#             b[word] += 1
#         else:
#             b[word] = 1
#     return b
# print(func())

# 6.My_str = ‘11sdsfsdf45sfxcv67qwe_9’ 手写一个函数，计算出字符串中所有数字的和

# def numsum():
#     My_str = "11sdsfsdf45sfxcv67qwe_9"
#     sum = 0 # 定义变量，准备记录数字的和
#     for i in range(len(My_str)):  # 遍历字符串
#
#         if My_str[i] >= '0' and My_str[i] <= '9':  # 如果i处的字符属于数字字符
#             sum = sum + int(My_str[i])  # 将字符转成int，求和
#     return sum
# print(numsum())

# 7.s = '<a href="www.test.com">test</a>'  写一个函数，能将字符串中的网址提取出来，即提取出www.test.com

# import re
# def Find():
#     # findall() 查找匹配正则表达式的字符串
#     s = '<a href="www.test.com">test</a>'
#     url = re.findall('www.+\.com', s) # .+表示匹配任意长度的任意字符，/.com为转义以.com结尾
#     return url[0]
# print(Find())

# 8.str = "卡巴斯基#杀毒软件#免费版#俄罗斯#" 手写一个函数，将该字符串解析为['卡巴斯基', '杀毒软件', '免费版', '俄罗斯']

# def func():
#     str = "卡巴斯基#杀毒软件#免费版#俄罗斯#"
#     a = str[:-1]
#     c = a.split("#")
#     return c
# 
# print(func())