开发基础（练习题）

一、基础语法练习题

#1
li = ['jiu','lin','liang']
print ("{0}{1}{2}{3}{4}".format(li[0],'_',li[1],'_',li[2]))
#2
li = ["alec", " aric", "Alex", "Tony", "rain"]
for l in li :
    if  l.strip().startswith("a") == True or l.strip().startswith("A") and   l.strip().endswith("c"):
        print(l.strip())

tu = ("alec", " aric", "Alex", "Tony", "rain")
for l in tu :
    if  l.strip().startswith("a") == True or l.strip().startswith("A") and   l.strip().endswith("c"):
        print(l.strip())

dic = {'k1': "alex", 'k2': ' aric', "k3": "Alex", "k4": "Tony"}
for l in dic.values() :
    if  l.strip().startswith("a") == True or l.strip().startswith("A") and   l.strip().endswith("c"):
        print(l.strip())

#3

#3
li = ['alex','eric','rain']
print(len(li))
li.append("seven")
print(li)
li.insert(0,"Tony")
print(li)
li[1] = "Kelly"
print(li)
li.pop(li.index("eric"))
print(li)
li_2 = li[1]
li.pop(1)
print(li_2,li)
print(li)
li.pop(3)
print(li[3:])
li.pop(2,4)
print(li)
print(li[::-1])for k in range(len(li)):
    print(k)
for k,y in enumerate(li):
    print(k+100,y)

#4
li = ["hello", 'seven', ["mon", ["h", "kelly"], 'all'], 123, 446]
print(li[2][1][1])
li[2][2] = 'ALL'
print(li)

#5

#5
tu = ('alex', 'eric', 'rain')
print(len(tu))
print(tu[2])
print(tu[1],tu[2])
for i in tu:
    print(i)
for i in range(len(tu)):
    print(i)
for k,y in enumerate(tu):
    print(k+10,y)

#6
tu = ("alex", [11, 22, {"k1": 'v1', "k2": ["age", "name"], "k3": (11,22,33)}, 44])
#1，只读列表，2，不能修改
#不可以
#k2是 字典，对应的值是列表可以被修改
tu[1][2]["k2"].append("Seven") 
print(tu)
#k3对应的值是元祖不能修改

#7
dic = {'k1': "v1", "k2": "v2", "k3": [11,22,33]}
for k in dic.keys():
    print(k)
for v in dic.values():
    print(v)
for k,y in dic.items():
    print(k,y)
dic["k4"] = "v4"
print(dic)
dic['k1'] = 'alex'
print(dic)
dic['k3'].append(44)
print(dic)
dic["k3"].insert[0,18]print(dic)

#8
s = 'alex'
print(s.split())
print(tuple(s))
li = ['alex','seven']
print(tuple(li))
tu = ('alex','seven')
print(list(tu))
li = ['alex','seven']
dic = {}
for k,y in enumerate(li):
    dic.setdefault((10-k),y )
    print(dic)

#9
s = [11,22,33,44,55,66,77,88,99,90]
len(s)
k1 = []
k2 = []
dic = {'k1':None,'k2':None}
for k in range(len(s)):
    print(s[k])
    if s[k] > 66 :
        k1.append(s[k])
    elif s[k] <66 :
        k2.append(s[k])
dic['k1'] = k1
dic['k2'] = k2
print(dic)

#10
li = ["手机", "电脑", '鼠标垫', '游艇']
shoplist = []
for k,y in enumerate(li):
    print(k,y)
user = int(input("输入序号---"))
print(li[user])
user_1 = (input("添加的商品----"))
(li.append(user_1))
print(li)
#11
city = {"北京":{"朝阳":["大望路","国贸"],
               "昌平":["沙河","昌平"]},
        "河北":{"张家口":["沙城","宣化"],
                "石家庄":["某某路","某某街"]}
        }
go = True
while go:
    cc = []
    dq = []
    print("33[31;1m一级列表33[1m".center(40,"="))
    for i,v in enumerate(city,1):
        print(i,v)
        cc.append(v)
    print("33[35;1m插入数据 i 退出按Q33[1m")
    u_c1 = str(input(">>>"))
    if u_c1.isdigit():#进二级之前判断
        u_c1 = int(u_c1)
        if u_c1 >0 and u_c1 <=len(cc):
            while go:
                print("33[32;1m二级列表33[1m".center(40, "="))
                for i1,v1 in enumerate(city[cc[u_c1-1]],1):
                    print(i1,v1)
                    dq.append(v1)
                print("33[35;1m退出按Q 返回 B33[1m")
                u_c2 = input(">>>")
                if u_c2.isdigit():#进三级之前判断
                    u_c2 = int(u_c2)
                    if u_c2 >0 and u_c2<=len(dq):
                        while go:
                            print("33[32;1m三级列表33[1m".center(40, "="))
                            for s in city[cc[u_c1-1]][dq[u_c2-1]]:
                                print(s)
                            print("33[35;1m退出按Q 返回 B33[1m")
                            u_c3 = input(">>>")
                            if u_c3 == "q" or u_c3 == "Q":
                                go = False
                                break
                            if u_c3 == "b" or u_c3 =="B":
                                del dq[:]
                                break
                            else:
                                print("33[31;1m输入不正确33[1m")
                    else:
                        print("33[31;1m输入超出范围！33[1m")
                elif u_c2 == "q" or u_c2 == "Q":
                    go = False
                    break
                elif u_c2 == "b" or u_c2 == "B":
                    del cc[:]
                    del dq[:]
                    break
                else:
                    print("33[31;1m输入格式不对！33[1m")
    elif u_c1.isalpha():
        if u_c1 == "q" or u_c1 == "Q":
            break
        elif u_c1 == "i" or u_c1 == "I":
            print("33[32;1m添加信息33[1m".center(40,"="))
            ct_name = input("省：")
            if ct_name == "Q" or ct_name == "q":
                break
            else:
                if city.get(ct_name,0) == 0:
                    city[ct_name] = {}
            dq_name = input("市：")
            if dq_name == "Q" or dq_name == "q":
                break
            else:
                if city[ct_name].get(dq_name,0) == 0:
                    city[ct_name][dq_name]=[]
            while True:
                print("33[31;1m循环添加，退出请按Q！33[1m")
                s = input("县：")
                if s == "q" or s == "Q":
                    break
                else:
                    city[ct_name][dq_name].append(s)
        else:
            print("33[31;1m输入超出范围！33[1m")
    else:
        print("33[31;1m输入格式不对！33[1m")

#12
None ""  () []  {} 0 
#13
l1 = [11,22,33]
l2 = [22,33,44]
#都有的元素
for i in l1:
    if i in l2:
        print(i)
#l2没有的
for i in l1:
    if i not in l2:
        print(i)
#l1没有的
for i in l2:
    if i not in l1:
        print(i)
#互相都没有的元素
for i in l1:
    if i not in l2 :
        print(i)
for k in l2:
    if k not in l1:
        print(k)

#14

#14
for i in range(100,0,-1):
    print(i)
for i in range(1,101):
    print(i)
count = 100
while count >1 :
    count -= 1
    print(count)
count = 0
while count <100 :
    count +=1
    print(count)
    

#15
for i in range(1,10):
    for j in range(1,i+1):
        print(str(i) + "*" + str(j) + "=" + str(i * j), end=' ')
    print()

 

查看全文