python - 检查字符串是否只包含一些值，而不包含其他值

Question

print("Hello, welcome to password strength. Test how strong your password is todai!")
password = input("Well enter a password why don't you... ")
print("So your password is", password)
print("Well ok, let's see what i can understand from this...")

if len(password) < 6:   
    print("Your password is too short")    
else:    
    print("Your password is of a good length")    

if password == password.upper():    
    print("Your password has too many uppercase letters")
else:    
    print("Your password has 0 or a couple upper case letters, please consider making your password remember-able.")

if password == password.lower():    
    print("Your password needs a upper case letter case letters")
else:    
    print("Your password has a suitable amount of lowercase vs upper case letters")

if password == 

这是我想问密码是否只包含数字的地方，但我不知道该怎么做，我已经尝试过使用 ands 和 ors，但失败得很惨。

Answer 1

使用isdigit()

>>> "abcd123".isdigit()
False

>>> "123".isdigit()
True