cur_page = 1 if request.GET.get("page"): cur_page = int(request.GET.get("page")) if cur_page: c_page = paginator.page(cur_page) else: c_page = paginator.page(1)
时间: 2024-04-27 11:25:07 浏览: 16
这是一个 Django 视图函数中的代码片段。它首先将当前页码设置为 1,然后检查是否有 GET 请求参数中传递了页码信息,如果有,则将当前页码更新为 GET 请求参数中传递的页码。接着,它使用 Django 自带的分页器(paginator)对数据进行分页,将当前页面设置为 c_page 变量。如果没有传递页码信息,则将当前页面设置为第一页。这段代码的作用是根据用户请求的页码对数据进行分页,并返回对应页码的数据。
相关问题
对下面代码每一步含义进行注释 if not root.left: right_head = convert(root.right) right_tail = right_head while right_tail.next: right_tail = right_tail.next cur_node = ListNode(root.val, None, right_head) right_head.prev = cur_node return cur_node
首先,这段代码是Python语言的代码,是一个函数,函数名未知。
第一行代码:if not root.left: 判断节点root是否存在左子树,如果不存在左子树,则执行下面的代码。
第二行代码:right_head = convert(root.right) 将右子树转换成链表,并将链表头赋值给right_head。
第三行代码:right_tail = right_head 将right_tail指向right_head。
第四行代码:while right_tail.next: 判断right_tail的下一个节点是否存在,如果存在,则执行下面的代码。
第五行代码:right_tail = right_tail.next 将right_tail指向它的下一个节点。
第六行代码:cur_node = ListNode(root.val, None, right_head) 创建一个新的节点cur_node,它的值为root的值,它的前驱节点为None,它的后继节点为right_head。
第七行代码:right_head.prev = cur_node 将right_head的前驱节点指向cur_node。
第八行代码:return cur_node 返回cur_node节点。
cur_dir = '/'.join(os.path.abspath(__file__).split('/')[:-1]) self.data_path = os.path.join(cur_dir, 'data/medical.json')
As an AI language model, I cannot accurately determine the context and purpose of this code snippet. However, I can explain what each line does:
- `cur_dir = '/'.join(os.path.abspath(__file__).split('/')[:-1])`: This line sets the variable `cur_dir` to the absolute path of the current file, obtained using `os.path.abspath(__file__)`, and then splits it into its individual directory components using `split('/')`. The `[:-1]` notation means that all components except the last one (which is the file name) are included. Finally, the components are joined back together using `'/'` as the separator to create the directory path.
- `self.data_path = os.path.join(cur_dir, 'data/medical.json')`: This line sets the instance variable `data_path` to the path of a JSON file named `medical.json` located in a subdirectory called `data` within the directory specified by `cur_dir`. This is accomplished using the `os.path.join()` function, which combines the two path components into a single path string.