一行代码搞定数据验证：Python数据验证神器Validators

pip install validators

import validators

# 验证邮箱地址
email_is_valid = validators.email("test@example.com")
print(f"邮箱验证结果：{email_is_valid}")  # 输出：True

# 验证URL链接
url_is_valid = validators.url("https://www.python.org")
print(f"URL验证结果：{url_is_valid}")  # 输出：True

# 验证字符串长度
length_is_valid = validators.length("hello", min_val=3, max_val=10)
print(f"长度验证结果：{length_is_valid}")  # 输出：True

# 标准邮箱验证
validators.email("user@example.com")  # True
validators.email("user+tag@example.com")  # True（符合RFC标准）
validators.email("invalid-email")  # ValidationError

# HTTPS URL验证
validators.url("https://www.python.org")  # True
# HTTP URL验证
validators.url("http://example.com/path")  # True

# IPv4地址验证
validators.ip_address.ipv4("192.168.1.1")  # True
# IPv6地址验证
validators.ip_address.ipv6("2001:0db8:85a3:0000:0000:8a2e:0370:7334")  # True

# 数值范围验证
validators.between(25, min_val=18, max_val=60)  # True（在18-60之间）

# 字符串长度验证
validators.length("username", min_val=3, max_val=20)  # True

from validators import validator

# 自定义密码强度验证
@validator
def strong_password(password):
    has_upper = any(c.isupper() for c in password)
    has_digit = any(c.isdigit() for c in password)
    has_special = any(c in '!@#$%^&*' for c in password)

    return (len(password) >= 8 and has_upper and has_digit and has_special)

# 使用自定义验证
print(strong_password("Weakpass1"))    # ValidationError（缺少特殊字符）
print(strong_password("StrongPass2!")) # True

import validators
from validators import validator
import re

# 自定义用户名验证（正则匹配）
@validator
def username_validator(username):
    pattern = r'^\w{6,20}$'  # 匹配字母、数字、下划线，长度6-20
    return re.match(pattern, username)

# 自定义邮箱域名限制
@validator
def allowed_email(email, allowed_domains):
    if not validators.email(email):
        return False
    domain = email.split('@')[-1]
    return domain in allowed_domains

# 密码强度验证
def validate_password(password):
    return (validators.length(password, min_val=8) and
            any(c.isupper() for c in password) and  # 包含大写字母
            any(c.isdigit() for c in password))     # 包含数字

# 完整验证逻辑
def validate_user_data(data):
    errors = {}

    # 验证用户名
    if not username_validator(data.get("username", "")):
        errors["username"] = "用户名必须为6-20位字母、数字或下划线"

    # 验证邮箱
    email = data.get("email", "")
    if not allowed_email(email, ["example.com", "company.org"]):
        errors["email"] = "请使用允许的域名邮箱（example.com/company.org）"

    # 验证年龄
    age = data.get("age", 0)
    if '.' in str(age) or not validators.between(age, min_val=18, max_val=60):
        errors["age"] = "年龄必须为18-60之间的整数"

    # 验证密码
    password = data.get("password", "")
    if not validate_password(password):
        errors["password"] = "密码需至少8位，包含大小写字母和数字"

    return len(errors) == 0, errors

# 测试数据
user_data = {
    "username": "user_123",
    "email": "user@example.com", 
    "age": 25,
    "password": "SecurePass123",
}

is_valid, errors = validate_user_data(user_data)
if is_valid:
    print("数据验证通过！")
else:
    print("验证失败，错误信息：", errors)