dictionary.tables是什么意思
时间: 2023-08-26 16:10:30 浏览: 55
`dictionary.tables` 是 SAS 中的一个元数据视图,它提供了关于数据库中表格的元数据信息。元数据是描述数据的数据,可以包含有关表格、列、索引、约束等的信息。
`dictionary.tables` 视图中的每一行代表一个表格,并包含了关于该表格的各种属性信息,如表格名称、所属库名、数据类型、创建日期等。通过查询 `dictionary.tables` 视图,可以获取有关表格的详细信息,用于数据管理和分析。
在你提供的代码中,通过查询 `dictionary.tables` 视图,使用了条件 `libname="WORK"`,获取了库名为 "WORK" 的所有表格的信息。这样可以得到该库中所有表格的名称,以及符合条件的表格数量等信息。
相关问题
FAILED test_api.py::TestApi::test_get_token - TypeError: unhashable type: 'dict'
This error occurs because you are attempting to use a dictionary as a key in a hash table, which is not possible because dictionaries are mutable and their values can change. Hash tables require keys to be immutable so that they can be hashed and looked up quickly.
To fix this error, you should convert the dictionary to an immutable data type such as a tuple, frozenset, or named tuple before using it as a key in a hash table. Alternatively, you could use a different data structure that does not require hashable keys, such as a list or a queue.
Here is an example of how you could convert a dictionary to a tuple:
```
my_dict = {'key1': 'value1', 'key2': 'value2'}
my_tuple = tuple(sorted(my_dict.items()))
```
This converts the dictionary to a tuple of its (key, value) pairs, sorted by key, which can be used as a hashable key in a hash table.
Alternatively, you could use a frozenset:
```
my_dict = {'key1': 'value1', 'key2': 'value2'}
my_frozenset = frozenset(my_dict.items())
```
This creates a frozenset of the (key, value) pairs, which is also immutable and can be used as a key in a hash table.
给我一个 C# Npoi 2.5.6版本 根据书签模板导出word的帮助类
以下是一个基于 NPOI 2.5.6 版本,根据书签模板导出 Word 的 C# 帮助类:
```csharp
using System.Collections.Generic;
using System.IO;
using NPOI.OpenXmlFormats.Wordprocessing;
using NPOI.XWPF.UserModel;
namespace WordExportDemo
{
public class WordExportHelper
{
public static void ExportWord(string templatePath, string outputPath, Dictionary<string, string> bookmarkValues)
{
using (FileStream fs = new FileStream(templatePath, FileMode.Open, FileAccess.Read))
{
XWPFDocument doc = new XWPFDocument(fs);
foreach (XWPFParagraph p in doc.Paragraphs)
{
ReplaceBookmarkValues(p, bookmarkValues);
}
foreach (XWPFTable t in doc.Tables)
{
foreach (XWPFTableRow r in t.Rows)
{
foreach (XWPFTableCell c in r.GetTableCells())
{
foreach (XWPFParagraph p in c.Paragraphs)
{
ReplaceBookmarkValues(p, bookmarkValues);
}
}
}
}
using (FileStream output = new FileStream(outputPath, FileMode.Create, FileAccess.Write))
{
doc.Write(output);
}
}
}
private static void ReplaceBookmarkValues(XWPFParagraph p, Dictionary<string, string> bookmarkValues)
{
List<CTBookmark> bookmarks = p.GetCTP().GetBookmarkStartList();
foreach (CTBookmark bookmark in bookmarks)
{
if (bookmarkValues.ContainsKey(bookmark.name))
{
XWPFRun run = new XWPFRun(p.GetCTP().AddNewR(), p);
run.SetText(bookmarkValues[bookmark.name]);
p.GetCTP().GetBookmarkEndList().Add(bookmark);
}
}
}
}
}
```
使用方法:
```csharp
Dictionary<string, string> bookmarkValues = new Dictionary<string, string>();
bookmarkValues.Add("Name", "John Doe");
bookmarkValues.Add("Age", "25");
bookmarkValues.Add("Gender", "Male");
WordExportHelper.ExportWord("Template.docx", "Output.docx", bookmarkValues);
```
其中,`Template.docx` 是包含书签的 Word 模板文件,`Output.docx` 是生成的 Word 文件,`bookmarkValues` 是一个包含书签名称和对应值的字典。
相关推荐
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![doc](https://img-home.csdnimg.cn/images/20210720083327.png)
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)