函数与异常数据编程

text1

print(sum)
sum = 42
print(sum)

def inc(n):
    sum = n+1
    print(sum)
    return(sum)

sum = inc(7) + inc(7)
print(sum)

结果：

 

text2_1

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]
#'*'后面只可以通过参数访问
def func3(a,b,c,/,d,e,f):
    return[a,b,c,d,e,f]
#‘/’前面的只能通过位置访问

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, d=0, e=5, f=3))

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))

print(func3(111,999,222,0,555,333))
print(func3(111,999,222,d=0, e=555, f=333))

结果

text2_1_1

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]
#'*'后面只可以通过参数访问
def func3(a,b,c,/,d,e,f):
    return[a,b,c,d,e,f]
#‘/’前面的只能通过位置访问

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, d=0, e=5, f=3))

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))
print(func2(11,99,22,0,55,33))

print(func3(111,999,222,0,555,333))
print(func3(111,999,222,d=0, e=555, f=333))
print(func3(a=111,b=999,c=222,0,555,333))

结果

text2_2

list1 = [1,9,8,4]

print(sorted(list1))
print(sorted(list1, reverse=True))
print(sorted(list1, True))

结果

text2_3

 def func(a,b,c,/,*,d,e,f):return([a,b,c,d,e,f]) 3 4 print(func(1,2,3,d=4,e=5,f=6)) 

结果

 

 

text3_1

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**2 - 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('有其他错误发生\n')
    else:
        root1, root2 = solve(a, b, c)
        print(f'root1 = {root1:.2f}, root2 = {root2:.2f}')
        print()

结果

 

text3_2

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**2 - 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

print(solve.__doc__)
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('有其他错误发生\n')
    else:
        root1, root2 = solve(a, b, c)
        print(f'root1 = {root1:.2f}, root2 = {root2:.2f}')
        print()

结果

 

text4

def list_generator(*,a, b, c = 1):
    '''
    list_generator(), 生成指定范围区间、指定步长的列表。要求，范围区间起始值、终止值、步长
    ，通过参数传递。调用时，如果没有指定步长，默认步长为1
    '''
    if type(c) == 1:
        lista = list(range(a, b+1))
    else:
        lista = []
        for i in range(0, int((b-a+2)/c)):
            n = a
            n += i*c
            if a <= n <= b:
                lista.append(n)
    return lista
print(list_generator.__doc__)
list1 = list_generator(a = -5, b = 5)
print(list1)
list2 = list_generator(a = -5, b = 5, c = 2)
print(list2)
list3 = list_generator(a = 1, b = 5, c = 0.5)
print(list3)

结果

 

text5

def is_prime(n):
    l = []
    for i in range(2,n):
        if n%i == 0:
            l.append(i)
        else:
            continue
    if len(l) == 0 or n == 2:
        return True
    else:
        return False



prime = []
for i in range(2,21):
    if is_prime(i):
        prime.append(i)
    else:
        continue


for j in range(2,21,2):
    for a in prime:
        if (j-a) in prime and a <= (j-a):
            print(f'{j} = {a} + {j-a}')
        else:
            continue

结果

 

 

text6

#编码函数encoder（）定义
def encoder(text):
    text_1 = list(text)
    text_2 = []
    for i in text_1:
        a = ord(i)
        if 97 <= a <= 117 or 65 <= a <= 85:
            b = a + 5
        elif 86 <= a <= 90:
            b = 64 + (a-85)
        elif 118 <= a <= 122:
            b = 96 + (a-117)
        else:
            b = a
        text_2.append(chr(b))
    return (''.join(text_2))

#解码函数decoder（）定义
def decoder(text):
    text_1 = list(text)
    text_2 = []
    for i in text_1:
        a = ord(i)
        if 102 <= a <= 122 or 70 <= a <= 90:
            b = a - 5
        elif 97 <= a <= 101:
            b = 122 - (103 - a)
        elif 65 <= a <= 69:
            b = 90 - (70 - a)
        else:
            b = a
        text_2.append(chr(b))
    return(''.join(text_2))


text = input('输入英文文本: ')
encoded_text = encoder(text)
print('编码后的文本: ', encoded_text)
decoded_text = decoder(encoded_text)
print('对编码后的文本解码: ', dcoded_text)

结果

 

 

text7

def collatz(n):
    lst = [n]
    while lst[-1] != 1:
        if  lst[-1]%2 == 1:
            lst.append(lst[-1]*3 + 1)
        else:
            lst.append(lst[-1]//2)
    print(lst)
    return lst

try:
        n = int(input('输入一个正整数'))
        if n <= 0:
            raise
except :
        print('Error:must be a positive integer')
else:
        collatz(n)

结果

 

 

text8

def func(n):
    if n == 1:
        return 1
    else:
        return 2*func(n-1) + 1


while True:
    x = input()
    if x == '#':
        print('计算结束')
        break
    n = int(x)
    ans = func(n)
    print(f'n = {n}, ans = {ans}')

结果