Python基础知识练习题（二）

1、有两个列表

 l1    =  [11,22,33]
 l2    =  [22,33,44]

a.   获取内容相同的元素列表

for i in l1:
    if i in l2:
        print(i)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
22
33

b.   获取 l1 中有，l2 中没有的元素列表

for i in l1:
    if i not in l2:
        print(i)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
11

c.   获取 l2  中有， l1 中没有的元素列表

for i in l2:
    if i not in l1:
        print(i)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
44

d.   获取 l1  和 l2   中内容都不同的元素

for i in l1:
    if i not in l2:
        print(i)
for i in l2:
    if i not in l1:
        print(i)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
11
44

2、用代码实现，利用下划线将列表的每一个元素拼接成字符串,li = ['alex','eric','Witharush']

li = ['alex','eric','Witharush']
v = "_".join(li)
print(v)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
alex_eric_Witharush

　　若列表里面有数字

li = ['alex','eric','Witharush',123]
li [3] = str(li[3])
print("_".join((li)))

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
alex_eric_Witharush_123

　　若先定义一个空的字符串，通过for循环拼接

s = ""
li = ['alex','eric','Witharush',123]
for i in li:
    s = s +  str(i)
print(s)
print("_".join(s))

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
alexericWitharush123
a_l_e_x_e_r_i_c_W_i_t_h_a_r_u_s_h_1_2_3

3、有以下列表：

nums = [2,7,11,15,1,8,7]
请找到列表中任意两个元素相加能够等于9的元素组合,如， [(0,1),(4,5)]

way 1：通过printf的性质，输出样式为：（x,y）

for i in range(0,len(nums)):
    for j in range(0,len(nums)):
        if nums[i] + nums[j] == 9:
            print("("+str(i) + "," + str(j)+")",end="\t")

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
(0,1) (0,6) (1,0) (4,5) (5,4) (6,0)

　way 2:通过先定义一个空的列表，用for循环和append方法将每种组合追加到空列表中

a = []
for i in range(0,len(nums)):
    for j in range(0,len(nums)):
        if nums[i] + nums[j] == 9:
            a.append((i,j))
print(a)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
[(0, 1), (0, 6), (1, 0), (4, 5), (5, 4), (6, 0)]

4、写代码，有如下列表，按照要求实现每一个功能

li = ["Witharush","eric","rain"]

a.计算列表长度并输出

  print(len(li))

b.列表中追加元素"seven"，并输出添加后的列表

li.append("seven")
print(li)　　　　# 如果用   print(li.append("seven"))      输出为  None

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
['Witharush', 'eric', 'rain', 'seven']

c.请在列表的第1个位li请在列表的第一个位置插入元素"Tony"，并输出添加后的列表

li.insert(0,"Tony")
print(li)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
['Tony', 'Witharush', 'eric', 'rain']

d.请修改列表的第2个位置插入元素"Kelly"，并输出添加后的列表

li[1] = "Kelly"
print(li)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
['Witharush', 'Kelly', 'rain']

e.请删除列表中的元素"eric",并输出修改后的列表

li.remove("eric")
print(li)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
['Witharush', 'rain']

f.请删除列表中的第2个元素，并输出删除的元素的值和删除元素后的列表

v = li.pop(1)
print(v)
print(li)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
eric
['Witharush', 'rain']

g.请删除列表中的第3个元素,并输出删除元素后的列表

li.pop(2)
print(li)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
['Witharush', 'eric']

h.请删除列表中的第2至4个元素，并输出删除元素后的列表

del li[1:5]
print(li)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
['Witharush']

i.请将列表所有的元素反转，并输出反转后的列表

li.reverse()
print(li)   #   入如果用   print(li.reverse())     输出为     None

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
['rain', 'eric', 'Witharush']

　j.请使用for，len，range输出列表的索引

for i in range(len(li)):
    print(i,li[i])

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
0 Witharush
1 eric
2 rain

k.请使用enumrate是输出列表元素和序号(序号从100开始)

for i , v in enumerate(li, 100):
    print(i,v)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
100 Witharush
101 eric
102 rain

l.请使用for循环输出列表的所有元素

for i in li :
    print(i)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
Witharush
eric
rain

5、写代码，有如下元祖，按照要求实现每一个功能

 tu = ('alex','eric','Witharush')

a.计算元祖长度并输出

  print(len(tu))

b.获取元祖的第二个元素，并输出

  print(tu[1])

c.获取元祖的第 1-2 个元素，并输出

　print(tu[0:2])

d.请使用for输出元祖的元素

　for i in tu:
    　print(i)

e.请使用for，len，range输出元素的索引

for i in range(0,len(tu)):
    print(i,tu[i])

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
0 alex
1 eric
2 Witharush

f.请使用enumrate输出元祖元素和序号（序号从10开始）

for i, v in enumerate(tu, 10):
    print(i,v)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
10 alex
11 eric
12 Witharush

6、有如下变量，请实现要求的功能

tu = ("Witharush",[11,22,{"k1":'v1',"k2":["age","name"],"k3":(11,22,33)},44])

a.讲述元祖的特性

　　一级元素不可被修改，不能被增加或者删除

b.请问tu变量中的第一个元素"Witharush"是否可以被修改？

　　不行

c.请问tu变量中的"k2"对应的值是什么类型？是否可以被修改？如果可以，请在其中添加一个元素"Seven"

　　列表;可以被修改

　way 1:

tu[1][2]["k2"]="age","name","Seven"
print(tu)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
('Witharush', [11, 22, {'k1': 'v1', 'k2': ('age', 'name', 'Seven'), 'k3': (11, 22, 33)}, 44])

　　way 2：

tu[1][2]["k2"].append("Seven")
print(tu)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
('Witharush', [11, 22, {'k1': 'v1', 'k2': ['age', 'name', 'Seven'], 'k3': (11, 22, 33)}, 44])

d.请问tu变量中的"k3"对应的值是什么类型？是否可以被修改？如果可以，请在其中添加一个元素"Seven"

　　元祖;　元祖不能修改,但是可以将元祖里的值重新用字符串来替换

tu[1][2]["k3"] =(11,22,33,"Seven")
print(tu)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
('Witharush', [11, 22, {'k1': 'v1', 'k2': ['age', 'name'], 'k3': (11, 22, 33, 'Seven')}, 44])

　　若用append，报错

tu[1][2]["k3"].append("Seven")
print(tu)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
Traceback (most recent call last):
File "D:/PyProject/day13_homework/text.py", line 152, in <module>
tu[1][2]["k3"].append("Seven")
AttributeError: 'tuple' object has no attribute 'append'

7、用1，2，3，4，5，6，7，8 ，8个数，能组成多少个互不相同且无重复的两位数？

　　way 1 :

count = 0
for i in range(1, 9):
    for v in range(2,9):      #每次一大循环都有一个重复的两位数,可以直接让第二轮循环比第一轮少循环一次　　(野路子)
      count += 1
print(count)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
56

　　way 2 ：

count = 0
for i in range(1, 9):         #都从1到8开始  如果两位数一样了就不加    (常规)
    for v in range(1,9):
      if i != v:
          count += 1
print(count)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
56

　　way 3：

count = 0                 #比较死板，不灵活
for i in range(1, 9):
    for i in range(1,9):
        count += 1
count = count -8
print(count)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
56

8、九九乘法表

for i in range(1,10):
    for v in range(1,i+1):
        print(str(i) +  '*' + str(v) + '=' + str(i*v),end="\t")
    print("\n",end="")

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
1*1=1
2*1=2 2*2=4
3*1=3 3*2=6 3*3=9
4*1=4 4*2=8 4*3=12 4*4=16
5*1=5 5*2=10 5*3=15 5*4=20 5*5=25
6*1=6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=36
7*1=7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=49
8*1=8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=64
9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81

9、print用法中的“sep” 、"end"

print("Witharush","真","帅")
print("Witharush","真","帅",sep='帅',end="\t")     # sep:一次性输出多个时，默认分隔为空格,不用end的话，默认执行print("\n")
print("Witharush","真","帅",sep='帅')

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
Witharush 真帅
Witharush帅真帅帅 Witharush帅真帅帅

10、分页实现内容

a.通过for循环创建301条数据,数据类型不限,如:
Witharush-1     Witharush1@live.com      pwd1
Witharush-2     Witharush2@live.com      pwd2
Witharush-3     Witharush3@live.com      pwd3
...

提示用户 请输入要查看的页码，当用户输出指定页码，也显示指定数据
    注意:
        每页显示10条数据
        用户输出页码是非十进制数字，也提示输入内容格式错误

while True:
    user_list = [
    ]
    for i in range(1,302):
        temp = {"name":"Witharush"+str(i),"email":"Witharush"+str(i)+"@live.com","password":"pwd"+str(i)    }
        user_list.append(temp)
    s = input("请输入要查看的页码:")
    s = int(s)
    #1 >>> (0,10)
    #2 >>>(10,20)
    #3 >>>(20,30)
    start = (s-1) * 10
    end = s * 10
    result = user_list[start:end]
    for item in result:
         print(item,type(item))

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
请输入要查看的页码:1
{'name': 'Witharush1', 'email': 'Witharush1@live.com', 'password': 'pwd1'} <class 'dict'>
{'name': 'Witharush2', 'email': 'Witharush2@live.com', 'password': 'pwd2'} <class 'dict'>
{'name': 'Witharush3', 'email': 'Witharush3@live.com', 'password': 'pwd3'} <class 'dict'>
{'name': 'Witharush4', 'email': 'Witharush4@live.com', 'password': 'pwd4'} <class 'dict'>
{'name': 'Witharush5', 'email': 'Witharush5@live.com', 'password': 'pwd5'} <class 'dict'>
{'name': 'Witharush6', 'email': 'Witharush6@live.com', 'password': 'pwd6'} <class 'dict'>
{'name': 'Witharush7', 'email': 'Witharush7@live.com', 'password': 'pwd7'} <class 'dict'>
{'name': 'Witharush8', 'email': 'Witharush8@live.com', 'password': 'pwd8'} <class 'dict'>
{'name': 'Witharush9', 'email': 'Witharush9@live.com', 'password': 'pwd9'} <class 'dict'>
{'name': 'Witharush10', 'email': 'Witharush10@live.com', 'password': 'pwd10'} <class 'dict'>

11、用python开发程序自动计算方案

公鸡5文钱一只，母鸡3文钱一只，小鸡3只一文钱，用100文钱买100只鸡，其
中公鸡，母鸡，小鸡都必须要有，问公鸡，母鸡，小鸡要买多少只刚好凑足100问钱？

for gj in range(1,21):
    for mj in range(1,100//3):
        for xj in range(1,101):
            if gj + mj + xj == 100 and 5 * gj + 3 * mj + xj/3 ==100:
                print(gj,mj,xj)

D:\PyProject\day13_homework\venv\Scripts\python.exe D:/PyProject/day13_homework/text.py
4 18 78
8 11 81
12 4 84

Python基础知识练习题（二）

推荐阅读