1.实验任务1
task1.py
1 print(sum) 2 sum = 42 3 print(sum) 4 5 def inc(n): 6 sum = n+1 7 print(sum) 8 return sum 9 10 sum = inc(7) + inc(7) 11 print(sum)
2.实验任务2
task2_1.py
1 def func1(a,b,c,d,e,f): 2 ''' 3 返回参数aa,b,c,d,e,f构成的列表 4 默认，参数按位置传递；也支持关键字传递 5 ''' 6 7 return [a,b,c,d,e,f] 8 9 def func2(a,b,c,*,d,e,f): 10 ''' 11 12 返回参数a,b,c,d,e,f构成的列表 13 *后面的参数只能安关键字传递 14 ''' 15 16 return [a,b,c,d,e,f] 17 18 19 20 def func3(a,b,c,/,d,e,f): 21 ''' 22 23 返回参数a,b,c,d,e,f构成的列表 24 /前面的参数只能按位子传递 25 ''' 26 27 return [a,b,c,d,e,f] 28 29 30 #func1调用：按位置传递、按参数传递都可以 31 print( func1(1,9,2,0,5,3) ) 32 print( func1(a=1,b=9,c=2,d=0,e=5,f=3) ) 33 print( func1(1,9,2,f=3,d=0,e=5) ) 34 35 #func2调用：d,e,f必须按关键字传递 36 print( func2(11,99,22,d=0,e=55,f=33) ) 37 print( func2(a=11,b=99,c=22,d=0,e=55,f=33) ) 38 39 #func3调用：a,b,c必须按位置传递 40 print( func3(111,999,222,0,555,333) ) 41 print( func3(111,999,222,d=0,e=555,f=333) )
task2_2.py
1 list1 = [1,9,8,4] 2 3 print( sorted(list1) ) 4 print( sorted(list1,reverse=True) ) 5 print( sorted(list1,True) )
task2_3.py
1 def func(a,b,c,/,*,d,e,f): 2 return( [a,b,c,d,e,f] ) 3 4 print( func(1,2,3,d=4,e=5,f=6) )
3.实验任务3
task3.py
1 def solve(a,b,c):
2 '''
3 求解一元二次方程，返回方程的两个根
4
5 ：para:a,b,c: float 方程系数
6 ：return: tuple
7 '''
8 delta = b*b - 4*a*c
9 delta_sqrt = abs(delta)**0.5
10 p1 = -b/2/a
11 p2 = delta_sqrt/2/a
12
13 if delta >= 0:
14 root1 = p1 + p2
15 root2 = p1 - p2
16 else:
17 root1 = complex(p1,p2)
18 root2 = complex(p1,-p2)
19
20 return root1,root2
21
22
23 while True:
24 try:
25 t = input('输入一元二次方程系数a b c,或者，输入#结束：')
26 if t == '#':
27 print('结束计算，退出')
28 break
29 a,b,c = map(float,t.split())
30 if a == 0:
31 raise ValueError('a = 0,不是一元二次方程')
32 except ValueError as e:
33 print(repr(e))
34 print()
35 except:
36 print('有其他错误发生\n')
37 else:
38 root1,root2 = solve(a,b,c)
39 print(f'root1 = {root1:.2f},root2 = {root2:.2f}')
40 print()
1 def solve(a,b,c):
2 '''
3 求解一元二次方程，返回方程的两个根
4
5 ：para:a,b,c: float 方程系数
6 ：return: tuple
7 '''
8 delta = b*b - 4*a*c
9 delta_sqrt = abs(delta)**0.5
10 p1 = -b/2/a
11 p2 = delta_sqrt/2/a
12
13 if delta >= 0:
14 root1 = p1 + p2
15 root2 = p1 - p2
16 else:
17 root1 = complex(p1,p2)
18 root2 = complex(p1,-p2)
19
20 return root1,root2
21
22 print(solve.__doc__)
23 while True:
24 try:
25 t = input('输入一元二次方程系数a b c,或者，输入#结束：')
26 if t == '#':
27 print('结束计算，退出')
28 break
29 a,b,c = map(float,t.split())
30 if a == 0:
31 raise ValueError('a = 0,不是一元二次方程')
32 except ValueError as e:
33 print(repr(e))
34 print()
35 except:
36 print('有其他错误发生\n')
37 else:
38 root1,root2 = solve(a,b,c)
39 print(f'root1 = {root1:.2f},root2 = {root2:.2f}')
40 print()
4.实验任务4
task4.py
1 def list_generator(n,m,i=1): 2 list = [] 3 j = n 4 while j <= m: 5 list.append(j) 6 j+=i 7 return list 8 9 list1 = list_generator(-5,5) 10 print(list1) 11 12 list2 = list_generator(-5,5,2) 13 print(list2) 14 15 list3 = list_generator(1,5,0.5) 16 print(list3)
5.实验任务5
task5.py
1 def is_prime(n):
2 if n<= 1:
3 return False
4 for i in range(2,int(n**0.5)+1):
5 if n % i==0:
6 return False
7 return True
8
9 for n in range(21):
10 if n % 2 == 0:
11 for i in range(21):
12 ans1 = is_prime(i)
13 if ans1 == True:
14 j = n - i
15 ans2 = is_prime(j)
16 if ans2 == True:
17 print(f'{n} = {i} + {j}')
18 break
6.实验任务6
task6.py
1 def encoder(text):
2 text_1 = list(text)
3 text_2 = []
4 text_3 = ''
5 for i in text_1:
6 if 'a'<=i<='z':
7 if ord(i)+5>122:
8 ans = chr(ord(i)+5-26)
9 text_2.append(ans)
10 else:
11 ans = chr(ord(i)+5)
12 text_2.append(ans)
13 elif 'A'<=i<='Z':
14 if ord(i)+5>90:
15 ans = chr(ord(i)+5-26)
16 text_2.append(ans)
17 else:
18 ans = chr(ord(i)+5)
19 text_2.append(ans)
20 else:
21 text_2.append(i)
22 for j in text_2:
23 text_3 += j
24 return(text_3)
25
26 def decoder(text):
27 text_1 = list(text)
28 text_2 = []
29 text_3 = ''
30 for i in text_1:
31 if 'a'<=i<='z':
32 if ord(i)-5<97:
33 ans = chr(ord(i)-5+26)
34 text_2.append(ans)
35 else:
36 ans = chr(ord(i)-5)
37 text_2.append(ans)
38 elif 'A'<=i<='Z':
39 if ord(i)-5<65:
40 ans = chr(ord(i)-5+26)
41 text_2.append(ans)
42 else:
43 ans = chr(ord(i)-5)
44 text_2.append(ans)
45 else:
46 text_2.append(i)
47 for j in text_2:
48 text_3 += j
49 return(text_3)
50
51 text = input('输入英文文本：')
52
53 encoded_text = encoder(text)
54 print('编码后的文本：',encoded_text)
55
56 decoded_text = decoder(encoded_text)
57 print('对编码后的文本解码：',decoded_text)
7.实验任务7
task7.py
1 def collatz(n):
2 ans = [n]
3 while n >1:
4 if n % 2==0:
5 n = n//2
6 elif n % 2!=0:
7 n = n*3+1
8 ans.append(n)
9 return ans
10
11 try:
12 t = int(input('Enter a positive integer:'))
13 if t <= 0:
14 raise ValueError
15 except ValueError:
16 print('Error:must be positive integer')
17 else:
18 print(collatz(t))
8.实验任务8
task.py
1 def func(n):
2 if n == 0:
3 return 0
4 return 2*func(n-1)+1
5
6 while True:
7 x = input()
8 if x == '#':
9 print('计算结束')
10 break
11 n = int(x)
12 ans = func(n)
13 print(f'n = {n},ans = {ans}')
标签：return,函数,text,编程,实验,ans,print,root1,def From： https://www.cnblogs.com/wang2003chengxu/p/17413587.html