机试题
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lis = [['哇',['how',{'good':['cd',1000,'99']},'大帅哥'],'I']] （总分2分）
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列表lis中的'cd'全部变成大写。(1分)
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列表中的1000通过数字相加在转换成字符串的方式变成'10086'。(1分)
lis = [['哇',['how',{'good':['cd',1000,'99']},'大帅哥'],'I']] lis[0][1][1]["good"][0] =lis[0][1][1]["good"][0].upper() print(lis) lis[0][1][1]["good"][1] = str(lis[0][1][1]["good"][1]+9086) print(lis)
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dic = {'k1':'v1','k2':['alex','sb'],(1,2,3,):{'k3':['2',100,'wer']}} （总3分）
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将'k3'对应的值的最后面添加一个元素(1,2,3)。(1分)
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将'k2'对应的值的第2个位置前插入元素{'a'}。(1分)
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将(1,2,3,)对应的值添加一个键值对key:(1,)。(1分)
dic = {'k1':'v1','k2':['alex','sb'],(1,2,3,):{'k3':['2',100,'wer']}} dic[(1,2,3)]["k3"].append((1,2,3)) dic["k2"].insert(1,{"a"}) dic[(1,2,3)].update({"key":(1,)}) print(dic)
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敲七游戏. 从1开始数数. 遇到7或者7的倍数包(含17,27,这种数）要在桌上敲⼀下. 编程来完成敲七. 给出⼀个任意的数字n. 从1开始数. 数到n结束. 把每个数字都放在列表中, 在数的过程中出现7或 者7的倍数（包含17,27,这种数）.则向列表中添加⼀个'咣' 例如, 输⼊20.
lst = [1, 2, 3, 4, 5, 6, '咣', 8, 9, 10,11,12,13,'咣',15,16,'咣',18,19,20]
while True:
s = input("请输入一个正整数:")
if s.isdecimal() and int(s)>0:
lst = []
for i in range(1,int(s)+1):
if i % 7 == 0 or "7" in str(i):
lst.append("咣")
else:
lst.append(i)
print(lst)
break
else:
print("你输入的格式有误,请重新输入!")
- 完成36选7的操作, 1- 50之间随机产生36个数,从这36个数中选择7个不重复的数添加到列表中(5分)
from random import randint
print(randint(1,20)) # 从1到20之间随机产生1个整数
from random import randint
lst = []
for i in range(36):
lst.append(randint(1, 50))
lst = list(set(lst))[:7]
print(lst)
- 有文件t1.txt里面的内容为:（5分）
1,alex,22,13651054608,IT
2,wusir,23,13304320533,Tearcher
3,taibai,18,1333235322,IT
利用文件操作，将其构造成如下数据类型。
[{'id':'1','name':'alex','age':'22','phone':'13651054608','job':'IT',{'id':'2','name':'wusir','age':'23','phone':'13304320533','job':'Tearcher'},{'id':'3','name':'taibai','age':'18','phone':'1333235322','job':'IT'}]
with open("t1.txt","r",encoding="utf-8") as f:
lst = f.readlines()
lst_job = []
for i in lst:
lst1 = i.strip().split(",")
dic = {"id":lst1[0],"name":lst1[1],"age":lst1[2],"phone":lst1[3],"job":lst1[4]}
lst_job.append(dic)
print(lst_job)
- 有如下车牌和车辆归属地,形成一个新的字典,显示每个归属地的车辆共有多少：(8分)
cars = ['鲁A32444','鲁A12333','湘B8989M','⿊A49678','⿊B46555','沪B25044','冀A11111',"京A01101"]
locals = {'冀':{"A":"石家庄","B":"唐山"},
'⿊':{"A":"哈尔滨","B":"齐齐哈尔"},
'鲁':{"A":"济南","B":"青岛"},
'鄂':{"A":"武汉","B":"黄石"},
'湘':{"A":"长沙","B":"株洲"},
}
结果: {'济南':2, '株洲': 1, '哈尔滨': 1,'齐齐哈尔':1,'石家庄':1}
cars = ['鲁A32444','鲁A12333','湘B8989M','⿊A49678','⿊B46555','沪B25044','冀A11111',"京A01101"]
locals = {'冀':{"A":"石家庄","B":"唐山"},
'⿊':{"A":"哈尔滨","B":"齐齐哈尔"},
'鲁':{"A":"济南","B":"青岛"},
'鄂':{"A":"武汉","B":"黄石"},
'湘':{"A":"长沙","B":"株洲"},
}
dic ={}
for i in cars:
if i[0] in locals:
dic[locals[i[0]][i[1]]] = dic.get(locals[i[0]][i[1]],0)+1
print(dic)
- 有如下值li 将所有的数字保存至字典的第一个key中，将所有的字符串保存至第二个key的值中(4分)
li= ["a","b",11,22,33,44,55,"66",["alex","baoyuan","taibai"],"77","88","99"]
li = ["a","b",11,22,33,44,55,"66",["alex","baoyuan","taibai"],"77","88","99"]
dic = {"key1":[],"key2":[]}
for i in li:
if type(i) ==list:
for j in i:
if type(j) == int:
dic["key1"].append(j)
else:
dic["key2"].append(j)
elif type(i) == int:
dic["key1"].append(i)
else:
dic["key2"].append(i)
print(dic)
- userinfo.txt 文件中存放以下结构:(总分8分)
alex:alex3714
wusir:123456
meet:meet123
1.让用户选择:
1.注册
2.登录
2.用户选择注册就将账号和密码添加到userinfo.txt中,如果用户名存在就提示用户名存在,不存在就进行添加(2分)
3.用户选择登录,就验证用户的账号和密码是否与userinfo.txt一致,如果一致终止循环提示登录成功(3分)
4.让用户登录三次,三次错误将用户进行锁定提示用户名已锁定,并打印错误次数(使用字符串格式化)(3分)
with open("userinfo.txt ","r",encoding="utf-8")as f1:
lst = f1.readlines()
dic = {}
for i in lst:
k,v = i.strip().split(":")
dic[k]=v
while True:
chose = input("请输入你的选择(1.注册 2.登录)\n>>>")
if chose == "1":
name = input("请输入用户名:")
psd = input("请输入密码:")
psd1 = input("请再次输入密码:")
if name in dic:
print("用户名已存在,注册失败!")
continue
elif psd != psd1:
print("两次密码输入不一致,请重新注册!")
else:
dic[name] = psd
print("注册成功!")
with open("userinfo.txt","a",encoding="utf-8")as f2:
f2.write(f"\n{name}:{psd}")
break
elif chose == "2":
count = 3
while count :
count -=1
name2 = input("请输入用户名:")
psd2 = input("请输入密码:")
if name2 in dic :
if psd2 == dic[name2]:
print("登陆成功!")
break
else:
print("密码错误!")
if count:
print(f"你还有{count}次机会")
else:
print("此用户名已锁定!")
else:
print("账号不存在!")
if count:
print(f"你还有{count}次机会")
else:
print("此用户名已锁定!")
break
else :
print("请输入正确的选择")