一个简单的整形验证函数

int_to_python.py

def is_empty(value):
    """Check whether the given value should be considered "empty"."""
    return value is None or value == '' or (
        isinstance(value, (list, tuple, dict)) and not value)

def int_to_python(value,min=None,max=None,empty=False,default=0,error=None):
    """
    :param value: 待验证的值
    :param min:  值的最小取值范围
    :param max:  最大取值范围
    :param empty: 是否可以为空
    :param default: 默认值
    :param error: 如果出错的话,可以指定的返回错误语句
    :return: 返回(value,error) 元组
    """
    error = error if error else "非法的整数值"
    if value and isinstance(value,basestring):
        value = value.strip()
    if is_empty(value):
        return default,None if empty else  None,error
    try:
        value = int(value)
        if min is not None and value < min:
            return None,error
        if max is not None and value > max:
            return None,error
        return value,None
    except (ValueError,TypeError):
        return None,error