task1
print(sum)
sum = 42
print(sum)
def inc(n):
sum = n+1
print(sum)
return sum
sum = inc(7) + inc(7)
print(sum)
运行结果：
task2.1
def func1(a, b, c, d, e, f):
return [a,b,c,d,e,f]
def func2(a, b, c,*, d, e, f):#返回参数a,b,c,d,e,f构成的列表 *后面的参数只能按关键字传递
return [a, b, c, d, e, f]
def func3(a, b, c, /, d, e, f):#返回参数a,b,c,d,e,f构成的列表 /前面的参数只能按位置传递
return [a, b, c, d, e, f]
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))
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) )
运行结果：
错误：
task2.2
list1 = [1, 9, 8, 4] print( sorted(list1) ) print( sorted(list1, reverse=True) ) print( sorted(list1,True) )
运行结果：
task2.3
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))
运行结果：
task3
def solve(a, b, c):
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()
运行结果：
task4
def list_generator(a,b,c=1):
lst=[]
while a<=b:
lst.append(a)
a+=c
return lst
list1 = list_generator(-5, 5)
print(list1)
list2 = list_generator(-5, 5, 2)
print(list2)
list3 = list_generator(1, 5, 0.5)
print(list3)
运行结果：
task5
def is_prime(s):
sum=0
for i in range(2,s):
if s%i==0:
sum+=i
ans=sum==0
return ans
for i in range(2,21,2):
s=[]
for j in range(2,i):
if is_prime(j)==True:
s.append(j)
for m in s:
if (i-m)in s:
print(f'{i}={m}+{i-m}')
break
运行结果：
task6
list_s=['a','b','c','d','e','f','g','h','i','j','k',
'l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']
list_b=['A','B','C','D','E','F','G','H','I','J','K',
'L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z']
def encoder(x):
re=[]
for i in str(x):
if i in list_s:
a=list_s.index(i)
if a<=20:
i=list_s[a+5]
re.append(i)
else:
i=list_s[a+5-26]
re.append(i)
elif i in list_b:
a=list_b.index(i)
if a<=20:
i=list_b[a+5]
re.append(i)
else:
i=list_b[a+5-26]
re.append(i)
else:
re.append(i)
re=''.join(re)
return re
def decoder(x):
re=[]
for i in str(x):
if i in list_s:
a=list_s.index(i)
if a>=5:
i=list_s[a-5]
re.append(i)
else:
i=list_s[a+26-5]
re.append(i)
elif i in list_b:
a=list_b.index(i)
if a>=5:
i=list_b[a-5]
re.append(i)
else:
i=list_b[a+26-5]
re.append(i)
else:
re.append(i)
re=''.join(re)
return re
x=input('输入英文文本:')
print(f'编码后的文本:{encoder(x)}')
y=encoder(x)
print(f'对编码后的文本解码:{decoder(y)}')
运行结果：
task7:
def collatz(n):
re=[n]
while True:
if n==1:
break
if n%2==0:
n=int(n/2)
re.append(n)
else:
n=3*n+1
re.append(n)
return re
n=input('Enter a positive intefer:')
try:
n=int(n)
if n<=0 :
raise
except:
print('Error: must be a positive integer')
else:
print(collatz(n))
运行结果：
task8:
def func(n):
if n==0:
return 0
else:
return 2*(func(n-1)+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}')
运行结果：
标签：return,函数,sum,编程,list,re,实验,print,def From： https://www.cnblogs.com/e2718281/p/17408178.html