import re
def validate_email(email):
    pattern=r'^[\w.%+-]+@[\w.-]+\.[a-zA-Z]{2,}$'
    return bool(re.match(pattern,email))
def classify_email(email):
    if email.find(".edu")!=-1 or email.find(".ac.")!=-1:
        return "教育机构"
    elif email.find(".com")!=-1 or email.find(".org")!=-1 or email.find(".net")!=-1:
        return "公司"
    else:
        return "个人"
def extract_email_parts(email):
    username,domain=email.split("@",1)
    tld=domain.split(".")[-1]
    return {
        '用户名': username,  
        '域名': domain,     
        'TLD': tld         
    }
def obfuscate_email(email):
    parts=re.split(r'@',email)
    username, domain = parts
    if len(username) > 1:
        obfuscated_username = f"{username[0]}***{username[-1]}"
    else:
        obfuscated_username = username+"***"
    last_dot_index = domain.rfind(".")
    second_last_dot_index = domain[:last_dot_index].rfind(".") if last_dot_index != -1 else -1
    if second_last_dot_index != -1:
        obfuscated_domain = f"**{domain[second_last_dot_index + 1:]}"
    else:
        obfuscated_domain = f"**{domain}"
    return f"{obfuscated_username}@{obfuscated_domain}"
test_emails = [
    "user.name@university.ac.edu",
    "john.doe+test@example.com",
    "invalid.email@.com",
    "another_user@sub.domain.org",
    "private@gmail.com"
]
for item in test_emails:
    cnt=0
    print("测试邮箱：",item)
    if validate_email(item):
        print("验证结果：有效")
    else:
        print("验证结果：无效")
        print("---------------------------------")
        continue
    print("分类结果：",classify_email(item))
    print("提取信息：",end="")
    for i,v in extract_email_parts(item).items():
        cnt+=1
        if cnt==3:
            print(i,"=",v)
        else:
            print(i,"=",v,end="，")
    print("脱敏处理：",obfuscate_email(item))
    print("---------------------------------")