webhelpers 1.0 paginate bugs

Bug 1:
在使用webhelpers 1.0 的paginate时碰到了
TypeError("Sorry, your collection type is not supported by the paginate module. "
            "You can either provide a list, a tuple, an SQLAlchemy 0.4 select object or an "
            "SQLAlchemy 0.4 ORM-query object.")
通过跟踪代码，获知是paginate.py 中 get_wrapper函数所出的问题，导致每次都执行至

raise TypeError("Sorry, your collection type is not supported by the "
        "paginate module. You can provide a list, a tuple, a SQLAlchemy "
        "select object or a SQLAlchemy ORM-query object.")

将get_wrapper函数修改成如下即可

def get_wrapper(obj, sqlalchemy_session=None):
    """
    Auto-detect the kind of object and return a list/tuple
    to access items from the collection.
    """
    # If the collection is a sequence we can use it directly
    if isinstance(obj, (list, tuple)):
        return obj

    # If object is iterable we can use it directly
    if hasattr(obj, "__iter__") and hasattr(obj, "__len__"):
        return obj

    # Is SQLAlchemy 0.4 or better available? (0.3 is not supported - sorry)
    if sqlalchemy_available[:3] != '0.3':
        # Is the collection a query?
        if isinstance(obj, sqlalchemy.orm.query.Query):
            return _SQLAlchemyQuery(obj)
        # Is the collection an SQLAlchemy select object?
        if isinstance(obj, sqlalchemy.sql.expression.CompoundSelect) \
            or isinstance(obj, sqlalchemy.sql.expression.Select):
                return _SQLAlchemySelect(obj, sqlalchemy_session)

    raise TypeError("Sorry, your collection type is not supported by the "
        "paginate module. You can provide a list, a tuple, a SQLAlchemy "
        "select object or a SQLAlchemy ORM-query object.")

Bug 2:
"__getitem__ without slicing not supported"异常究其原因是__init__函数中的
self.items = list(self.collection)[self.first_item-1:self.last_item]
所导致，当调用list(self.collection)时，会循环调用self.collection的__getitem__方法，其实也就是
_SQLAlchemyQuery类的__getitem__方法，此时__getitem__的输入参数类型为int，肯定不会是slice，按照设
计就导致raise Exception, "__getitem__ without slicing not supported"，为解决这一问题，可以修改上述调用更改为：

#self.items = list(self.collection)[self.first_item-1:self.last_item]
                self.items = list(self.collection[self.first_item-1:self.last_item])