实验任务1
task1
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 11 sum = inc(7) + inc(7) 12 print(sum)View Code
不是同一个对象名称
1.Built-in。2和3 Global。4.Local
实验任务2
task2-1
1 def func1(a, b, c, d, e, f): 2 return [a,b,c,d,e,f] 3 4 5 def func2(a, b, c,*, d, e, f): 6 return [a,b,c,d,e,f] 7 8 9 def func3(a, b, c, /, d, e, f): 10 return [a,b,c,d,e,f] 11 12 13 # func1调用：按位置传递、按参数传递都可以 14 print( func1(1,9,2,0,5,3) ) 15 print( func1(a=1, b=9, c=2, d=0, e=5, f=3) ) 16 print( func1(1,9,2, f=3, d=0, e=5)) 17 18 19 # func2调用：d,e,f必须按关键字传递 20 print( func2(11, 99, 22, d=0, e=55, f=33) ) 21 print( func2(a=11, b=99, c=22, d=0, e=55, f=33) ) 22 23 24 # func3调用：a,b,c必须按位置传递 25 print( func3(111, 999, 222, 0, 555, 333)) 26 print( func3(111, 999, 222, d=0, e=555, f=333) )View Code
task2-2
1 list1 = [1, 9, 8, 4] 2 print( sorted(list1) ) 3 print( sorted(list1, reverse=True) ) 4 print( sorted(list1, True) )View Code
注：reverse的传递方式必须使用关键字。
task2-3
1 def func(a, b, c, /, *, d, e, f): 2 return([a,b,c,d,e,f]) 3 4 5 print(func(1, 2, 3, d=4, e=5, f=6))View Code
实验任务3
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 :para: a,b,c: float 方程系数
5 :return: tuple
6 '''
7 delta = b*b - 4*a*c
8 delta_sqrt = abs(delta)**0.5
9 p1 = -b/2/a
10 p2 = delta_sqrt/2/a
11
12 if delta >= 0:
13 root1 = p1 + p2
14 root2 = p1 - p2
15 else:
16 root1 = complex(p1, p2)
17 root2 = complex(p1, -p2)
18
19 return root1, root2
20
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('有其它错误发生\n')
37 else:
38 root1, root2 = solve(a, b, c)
39 print(f'root1 ={root1:.2f},root2 = {root2:.2f}')
40 print()
View Code
实验任务4
task4
1 # list_generator()函数定义 2 def list_generator(start, stop, step=1): 3 result = [] 4 i = start 5 while i <= stop: 6 result.append(i) 7 i += step 8 return result 9 10 11 list1 = list_generator(-5, 5) 12 print(list1) 13 list2 = list_generator(-5, 5, 2) 14 print(list2) 15 list3 = list_generator(1, 5, 0.5) 16 print(list3)View Code
实验任务5
task5
1 def is_prime(x):
2 for i in range(2,int(x**0.5+2)):
3 a=x%i
4 if a==0:
5 break
6 if a==0 and x!=2:
7 return False
8 elif a!=0 or x==2:
9 return True
10
11
12 for i in range(4,21,2):
13 for x in range(2,i):
14 y = i - x
15 if is_prime(x) and is_prime(y):
16 print(f'{i}={x}+{y}')
17 break
View Code
实验任务6
task6
1 def encoder(text):
2 x1 = ''
3 for i in text:
4 if 'a' <= i <= 'z':
5 i = chr((ord(i)-97+5) % 26 + 97)
6 x1 += i
7 elif 'A' <= i <= 'Z':
8 i = chr((ord(i)-65+5) % 26 + 65)
9 x1 += i
10 else:x1 += i
11 return x1
12
13
14 def decoder(text):
15 x2 = ''
16 for i in text:
17 if 'a' <= i <= 'z':
18 i = chr((ord(i)-97-5) % 26 + 97)
19 x2 += i
20 elif 'A' <= i <= 'Z':
21 i = chr((ord(i)-65-5) % 26 + 65)
22 x2 += i
23 else:
24 x2 += i
25 return x2
26
27
28 text = input('输入英文文本: ')
29 encoded_text = encoder(text)
30 print('编码后的文本: ', encoded_text)
31 decoded_text = decoder(encoded_text)
32 print('对编码后的文本解码: ', decoded_text)
View Code
实验任务7
task7
1 def collatz(n):
2 lst = []
3 lst.append(n)
4 while n != 1:
5 if n %2 == 0:
6 n = n/2
7 lst.append(int(n))
8 else:
9 n = n*3 +1
10 lst.append(int(n))
11 return lst
12 try:
13 n = int(input('Enter a positive integer:'))
14 if n <= 0:
15 raise ValueError
16 except ValueError:
17 print('Error: must be a positive integer')
18 else:
19 print(collatz(n))
View Code
实验任务8
task8
1 def func(a):
2 if a == 0:
3 return 0
4 else:
5 return 2*func(a-1)+1
6
7
8 while True:
9 x = input()
10 if x == '#':
11 print('计算结束')
12 break
13 n = int(x)
14 ans = func(n)
15 print(f'n = {n}, ans = {ans}')
View Code
标签：Code,return,函数,sum,编程,实验,print,def,View From： https://www.cnblogs.com/202280060019x/p/17407903.html