'''2，写函数，检查获取传入列表或元组对象的所有奇数位索引对应的元素，并将其作为新列表返回给调用者。''' def jishu(lis):     lis1 = []     for i in range(len(lis)):         if i % 2 == 1:             lis1.append(lis[i])     return lis1 lis = [1,2,3,4,5,6,7,8,9,10] lis1 = jishu(lis) print(lis1) '''3，写函数，判断用户传入的对象（字符串、列表、元组）长度是否大于5。''' def len_1(s):     if len(s) > 5:         return True     else:         return False s = "46assd" if len_1(s):     print("长度大于5") else:     print("长度小于5") '''4，写函数，检查传入列表的长度，如果大于2，将列表的前两项内容返回给调用者。''' def len_2(s):     if len(s) > 2:         return [s[0], s[1]]     else:         return s lis = [3,5,9,6,8] lis1 = len_2(lis) print(lis1) def len_2(s):     if len(s) > 2:         if type(s) == str:             return s[:2]         elif type(s) == dict:             dic = {}             count = 0             for k, v in dict.items(s):                 count += 1                 dic.setdefault(k, v)                 if count == 2:                     return dic         else:             return s[0], s[1]     else:         return False dic = [5,8,9,10] s = len_2(dic) print(s) '''5，写函数，计算传入函数的字符串中, 数字、字母、空格 以及 其他内容的个数，并返回结果。''' def count(s):     num = 0     letter = 0     kg = 0     qit = 0     for i in str(s):         if i.isdigit():             num += 1         elif i.islower() or i.isupper():             letter += 1         elif i == " ":             kg += 1         else:             qit += 1     return "数字:%s 字母:%s 空格:%s 其他内容:%s" % (num, letter, kg, qit) st = "123 as d   '''" stt = count(st) print(stt) '''6，写函数，接收两个数字参数，返回比较大的那个数字。''' def up(a, b):     if type(a) == int and type(b) == int:         if a < b:             return b         else:             return a     else:         return False a = up(10,8) print(a) '''7，写函数，检查传入字典的每一个value的长度,如果大于2，那么仅保留前两个长度的内容，并将新内容返回给调用者。''' '''    dic = {"k1": "v1v1", "k2": [11,22,33,44]}    PS:字典中的value只能是字符串或列表 ''' def dic2(s):     dic1 = {}     for k, v in dict.items(s):         if type(v) == str and len(v) > 2:             dic1[k] = v[:2]         elif type(v) == list and len(v) > 2:             dic1[k] = [v[0], v[1]]             # print(v[0], v[1])         else:             dic1[k] = v     return dic1 dic = {"k1": "v1v1", "k2": [11,22,33,44]} dic1 = dic2(dic) print(dic1) def dic2(s):     dic = {}     for k, v in dict.items(s):         if type(v) == int:             st = str(v)             dic.setdefault(k, int(st[:2]))         elif len(v) > 2:             if type(v) == str:                 dic.setdefault(k, v[:2])             elif type(v) == dict:                 count = 0                 dic1 = {}                 for k, v in dict.items(v):                     count += 1                     dic1.setdefault(k, v)                     if count == 2:                         break                 dic.setdefault(k, dic1)             elif type(v) == list:                 lis = [v[0], v[1]]                 dic.setdefault(k, lis)     return dic dic1 = {1:"asdas", 2:[1,2,3,4], 3:45644, 4:{3:3,4:5,6:7}} ll = dic2(dic1) print(ll) ''' 8，写函数，此函数只接收一个参数且此参数必须是列表数据类型， 此函数完成的功能是返回给调用者一个字典， 此字典的键值对为此列表的索引及对应的元素。 例如传入的列表为：[11,22,33] 返回的字典为 {0:11,1:22,2:33}。 ''' def dic(s):     dic1 = {}     for i in range(len(s)):         dic1.setdefault(i, s[i])     return dic1 lis = [1,2,3,4,4] dic1 = dic(lis) print(dic1) ''' 9，写函数，函数接收四个参数分别是：姓名，性别，年龄，学历。 用户通过输入这四个内容，然后将这四个内容传入到函数中， 此函数接收到这四个内容，将内容追加到一个student_msg文件中。                                  ''' def peop(name, sex, age, xue):     with open("student_msg", mode='a', encoding="utf-8") as f:         f.write("姓名:"+name+"\t")         f.write("性别:"+sex+"\t")         f.write("年龄:"+age+"\t")         f.write("学历:"+xue+"\t") peop("张紫益", "男", "29", "中专") '''10，对第9题升级：支持用户持续输入，Q或者q退出，性别默认为男，如果遇到女学生，则把性别输入女。''' def peo(name, sex, xue, age="男"):     with open("student_msg", mode='a', encoding="utf-8") as f:         f.write("\n"+name+"\t"+sex+"\t"+age+"\t"+xue+"\t") def pd():     pd = input("输入Q q 退出:").strip()     if pd.upper() == "Q":         return True     else:         return False while 1:     name = input("请输入姓名:").strip()     age = input("请输入年龄:").strip()     xue = input("请输入学历:").strip()     sex = input("请输入性别:").strip()     if sex == "":         peo(name, age, xue)         if pd():             break     else:         peo(name, age, xue, sex)     if pd():         break '''11，写函数，用户传入修改的文件名，与要修改的内容，执行函数，完成整个文件的批量修改操作（升级题）。''' def gai(name, loor, new ):     import os     name1 = name+"a"     with open(name, mode="r", encoding="utf-8") as f1,\             open(name1, mode="w", encoding="utf-8") as f2:         for line in f1:             st = line.replace(loor, new)             f2.write(st)     os.remove(name)     os.rename(name1, name) gai("student_msg","女","男") '''12，写一个函数完成三次登陆功能，再写一个函数完成注册功能(升级题)''' def zhuce():     print("请完成注册!")     name = input("用户名:").strip()     password = input("密码") .strip()     with open("xinxi", mode='a', encoding="utf-8")as f:         f.write(name+"\t"+password+"\n")     print("注册成功!  账号:%s  密码:%s" % (name, password)) def denglu():     count = 3     while count > 0:         count -= 1         name = input("请输入用户名:").strip()         password = input("请输入密码") .strip()         with open("xinxi", mode='r', encoding="utf-8") as f:             for line in f:                 lis = line.split()                 if lis[0] == name and lis[1] == password:                     return True             else:                 print("密码错误!您还有%s 次机会!" % count)     return False while 1:     print("注册: 1 登录: 2 退出: Q")     num = input("请输入:").strip()     if num.upper() == "Q":         break     elif num == "1":         zhuce()     elif num == "2":         if denglu():             print("登录成功!")             break         else:             print("登录失败!")     else:         print("输入错误! 重新输入!")