救救孩子吧，求大佬教一下第一题和第四题！！！

[仟炀＆]

 

 

[仟炀＆]

@测试有头发 谢谢大佬！

[测试有头发]

3.1

stra = input("请输入：")
digit_num = 0
letter_num = 0
space_num=0
other_num = 0
for i in stra:
    if i.isdigit():
        digit_num+=1
    elif i.isalpha():
        letter_num+=1
    elif i.isspace():
        space_num+=1
    else:
        other_num+=1
print(f"digit_num:{digit_num},letter_num:{letter_num},space_num:{space_num},other_num:{other_num}")

3.4

for i in range(1,5):
    print('*'*7)

for i in range(1,5):
    print('*' * i + (i - 1) * '*')

for i in range(1,5):
    print(' '*(5-1-i)+'*'*i+(i-1)*'*'+' '*(5-1-i))