python day09作业答案

2.
def lst(input):
    lst2=[]
    count=0
    for i in range(0,len(input)):
        if i %2!=0:
            lst2.append(input[i])
    return lst2
a=lst((2,9,29,36,9))
print(a)


3.
def pd(input):
    if len(input)>5:
        return True
    else:
        return False
a=pd((5,5,6,9,7))
print(a)

4.
def a(input):
    if type(input)==list:
        if len(input)>2:
            return input[0],input[1]
    else:
        return ('请输入列表')
d=a(['小明','大明'])
print(d)
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 func(s=""): # function
    shuzi = 0
    zimu = 0
    kongge = 0
    qita = 0
    for c in s: # 循环字符串.拿到每个字符
        if c.isdigit(): # 数字
            shuzi += 1
        elif c.isalpha():
            zimu+=1
        elif c == ' ':
            kongge += 1
        else:
            qita += 1
    return shuzi, zimu, kongge, qita
6.
def num(n1,n2):
    if n1>n2:
        return n1
    elif n1<n2:
        return n2
a=num(26,98)
print(a)
7.
def dic(dic):
    for k,v in dic.items():
        if len(v)>2:
            dic[k]=v[0:2]
    return dic
a=dic({1:'dsfgasdf',2:'sdfsdsd',3:'卡卡卡的双丰收'})
print(a)
8.
def list(input):
    dic={}
    if type(input)==type([]):
        for i in  range(0,len(input)):
            dic[i]=input[i]
        return dic
    elif type(input)!=type([]):
        return '请输入列表'
a=list([2,3,6,5,9,8])
print(a)
9.
def xx(姓名=input('姓名:'),性别=input('性别:'),年龄=input('年龄:'),学历=input('学历:')):
    student_msg={}
    student_msg['姓名']=姓名
    student_msg['性别'] = 性别
    student_msg['年龄'] = 年龄
    student_msg['学历'] = 学历
    return student_msg
a=xx()
print(a)
9.
def func(name, age,edu,sex ="男"):
    f = open("student.msg", mode="a", encoding="utf-8")
    f.write(name+"_"+str(age)+"_"+sex+"_"+edu+"
")
    f.flush()
    f.close()
10.
def xx():
    while True:
        a=input('姓名：')
        if a.lower() == 'q':
            break
        else:
            student_msg={}
            student_msg['姓名']=a
            student_msg['性别'] = input('性别:')
            student_msg['年龄'] = input('年龄:')
            student_msg['学历'] = input('学历:')
    return student_msg

aa=xx()
print(aa)
11.
def ch(wjm,ynr,xnr):
    import os
    with open(wjm,'r',encoding='utf-8') as f1, open('a.txt','w',encoding='utf-8') as f2:
        for i in f1.readlines():
            a=i.replace(ynr,xnr)
            f2.write(a)
    os.remove(wjm)
    os.rename('a.txt',wjm)
ch('4.txt','alex','sb')
12.
def dl(username,password):
    count=0
    while count<=3:
        if username=='18329042599' and password=='199348':
            return ('登录成功')
            count=count+1
        else :
            return ('请重新输入：')
            count+=1

a=dl(12563,'4646')
print(a)