python使用正则表达式判别用户输入密码的强弱并提示

Posted 2021-06-28 Data+Science+Insight

python使用正则表达式判别用户输入密码的强弱并提示

 

对于用户输入的密码、系统要去分析和判别，密码是否合法是否太简单以至于非常容易被试出来，来提高系统的稳健程度；
密码要强大需要满足：
1，最好9个字符最多20个字符
2，不能是换行或者空格
3，不能连续出现统一字符
4，字符模式不能重复出现（字符模式指的是至少两个字符构成的组合反复出现）

#Categorize Password as Strong or Weak using Regex in Python

# Categorizing password as Strong or
# Weak in Python using Regex


import re


# Function to categorize password
def password(v):

	# the password should not be a
	# newline or space
	if v == "\\n" or v == " ":
		return "Password cannot be a newline or space!"

	# the password length should be in
	# between 9 and 20
	if 9 <= len(v) <= 20:

		# checks for occurrence of a character
		# three or more times in a row
		if re.search(r\'(.)\\1\\1\', v):
			re