task1
实验源码:
print(sum) sum = 42 print(sum) def inc(n): sum = n+1 print(sum) return sum sum = inc(7) + inc(7) print(sum)
实验结果:
问题回答:不是。line1中是Python的内置函数,line3是指lin2的全局变量sum,line7中是inc函数中的局部变量,line11中是指line10的全局变量
task2-1:
实验源码:
def func1(a, b, c, d, e, f): return [a,b,c,d,e,f] def func2(a, b, c,*, d, e, f): return [a,b,c,d,e,f] def func3(a, b, c, /, d, e, f): return [a,b,c,d,e,f] # func1调用:按位置传递、按参数传递都可以 print(func1(1,9,2,0,5,3)) print(func1(a=1, b=9, c=2, d=0, e=5, f=3)) print(func1(1,9,2, f=3, d=0, e=5)) # func2调用:d,e,f必须按关键字传递 print(func2(11, 99, 22, d=0, e=55, f=33)) print(func2(a=11, b=99, c=22, d=0, e=55, f=33)) # func3调用:a,b,c必须按位置传递 print(func3(111, 999, 222, 0, 555, 333)) print(func3(111, 999, 222, d=0, e=555, f=333))
实验结果:
问题回答:是的
task2-2:
实验源码
list1 = [1,9,8,4] print(sorted(list1)) print(sorted(list1,reverse = True)) print(sorted(list1,True))
实验结果:
task2-3:
实验源码:
def func(a, b, c, /, *, d, e, f): return([a,b,c,d,e,f]) print(func(1,2,3,d=4,e=5,f=6))
实验结果:
task3:
实验源码:
def solve(a, b, c): ''' 求解一元二次方程, 返回方程的两个根 :para: a,b,c: float 方程系数 :return: tuple ''' delta = b*b - 4*a*c delta_sqrt = abs(delta)**0.5 p1 = -b/2/a p2 = delta_sqrt/2/a if delta >= 0: root1 = p1 + p2 root2 = p1 - p2 else: root1 = complex(p1, p2) root2 = complex(p1, -p2) return root1, root2 while True: try: t = input('输入一元二次方程系数a b c, 或者,输入#结束: ') if t == '#': print('结束计算,退出') break a, b, c = map(float, t.split()) if a == 0: raise ValueError('a = 0, 不是一元二次方程') except ValueError as e: print(repr(e)) print() except: print('有其它错误发生\n') else: root1, root2 = solve(a, b, c) print(f'root1 = {root1:.2f}, root2 = {root2:.2f}') print()
实验结果:
task4:
实验源码:
def list_generator(x,y,s=1): l = [] while x<=y: l.append(x) x = x+s return l list1 = list_generator(-5, 5) print(list1) list2 = list_generator(-5, 5, 2) print(list2) list3 = list_generator(1, 5, 0.5) print(list3)
实验结果:
task5:
实验源码:
def is_prime(n): if n==2: return True else: for i in range(2,int(n**0.5)+1): if n%i==0: return False return True for i in range(4,21,2): for s in range(2,i): if is_prime(i-s): print(f'{i} = {s} +{i-s}') break
实验结果:
task6:
实验源码:
1 # 编码函数encoder()定义 2 def encoder(a): 3 c = '' 4 for i in a: 5 if i.isalpha(): 6 temp = ord(i)+5 7 if chr(temp).isalpha(): 8 c += chr(temp) 9 else: 10 c += chr(temp-26) 11 else: 12 c += i 13 return c 14 15 # 解码函数decoder()定义 16 def decoder(x): 17 z = '' 18 for i in x: 19 if i.isalpha(): 20 temp = ord(i)-5 21 if chr(temp).isalpha(): 22 z+=chr(temp) 23 else: 24 z+=chr(temp+26) 25 else: 26 z += i 27 return z 28 29 # 主体代码逻辑 30 text = input('输入英文文本: ') 31 32 encoded_text = encoder(text) 33 print('编码后的文本: ', encoded_text) 34 35 decoded_text = decoder(encoded_text) 36 print('对编码后的文本解码: ', decoded_text)
实验结果:
task7:
实验源码:
1 def collatz(n): 2 l = [n] 3 while l[-1] !=1: 4 if l[-1]%2==0: 5 l.append(l[-1]//2) 6 else: 7 l.append(l[-1]*3+1) 8 return l 9 10 try: 11 x = int(input('Enter a positive integer:')) 12 if x <= 0: 13 raise 14 except: 15 print('Error:must be a positive integer') 16 else: 17 print(collatz(x))
实验结果:
task8:
实验源码:
1 # 函数func()定义 2 def func(n): 3 result = 1 4 for i in range(n): 5 result *= 2 6 return result-1 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}')
实验结果:
标签:return,函数,sum,编程,源码,实验,print,def From: https://www.cnblogs.com/114514x/p/17421500.html