import re

1

ip_address=r'((\d|[1-9]\d|1\d{2}|2[0-4]\d|25[0-5])\.){3}(\d|[1-9]\d|1\d{2}|2[0-4]\d|25[0-5])'
print(re.fullmatch(ip_address,'255.189.10.37'))
print(re.fullmatch(ip_address,'256.189.89.9'))

2

str1='hello90abc 78sjh12.5'
print(sum(float(x) for x in re.findall(r'\d+\.?\d*',str1)))

3

while True:
    str1=input('请输入汉字：')
    re_str=r'[\u4e00-\u9fa5]+'
    print(re.fullmatch(re_str, str1))
    if re.fullmatch(re_str,str1):
        break

4

re_str=r'1[^012]\d{9}'
tel='13080196242'
print(re.fullmatch(re_str,tel))

5

abd,bc,abcd,ad,bc