/// tip | Tipp

Tun Sie dies **jedes Mal**, wenn Sie eine **neue Terminalsitzung** starten, um an dem Projekt zu arbeiten.

///

//// tab | Linux, macOS

<div class="termy">

```console
$ source .venv/bin/activate
```

</div>

////

    return (dotIndex == -1) ? fileName : fileName.substring(0, dotIndex);
  }

  /**
   * Returns a {@link Traverser} instance for the file and directory tree. The returned traverser
   * starts from a {@link File} and will return all files and directories it encounters.
   *
   * <p><b>Warning:</b> {@code File} provides no support for symbolic links, and as such there is no

	entry.Error = opts.Error
	entry.API.Name = opts.APIName
	entry.API.Bucket = opts.Bucket
	entry.API.Objects = []xaudit.ObjectVersion{{ObjectName: opts.Object, VersionID: opts.VersionID}}
	entry.API.Status = opts.Status
	entry.Tags = make(map[string]any, len(opts.Tags))
	for k, v := range opts.Tags {
		entry.Tags[k] = v
	}

	// Merge tag information if found - this is currently needed for tags

- Kubeadm: waiting for etcd learner member to be started before promoting during 'kubeadm join' ([#136364](https://github.com/kubernetes/kubernetes/pull/136364), [@d...

$ python main.py

I solemnly swear 🐺
```

</div>

## Alternatives { #alternatives }

This is a simple guide to get you started and teach you how everything works **underneath**.

There are many **alternatives** to managing virtual environments, package dependencies (requirements), projects.

 *   <li>{@code stringConverter().reverse().convert(1.0)} returns the string {@code "1.0"} --
 *       <i>not</i> the same string ({@code "1.00"}) we started with
 * </ol>
 *
 * <p>Note that it should still be the case that the round-tripped and original objects are
 * <i>similar</i>.
 *
 * <h3>Nullability</h3>
 *

        ChannelStatistics stats = channelStats.computeIfAbsent(channelId, 
            k -> new ChannelStatistics());
            
        stats.operations.incrementAndGet();
        stats.latencyTotal.addAndGet(latency);
        
        if (success) {
            stats.bytesReceived.addAndGet(bytes);
        } else {
            stats.errors.incrementAndGet();
        }
    }
    

 *   <li>{@code stringConverter().reverse().convert(1.0)} returns the string {@code "1.0"} --
 *       <i>not</i> the same string ({@code "1.00"}) we started with
 * </ol>
 *
 * <p>Note that it should still be the case that the round-tripped and original objects are
 * <i>similar</i>.
 *
 * <h3>Nullability</h3>
 *

  }

  /**
   * Encodes the long as a string with given radix, then uses {@link Longs#tryParse(String, int)} to
   * parse the result. Asserts the result is the same as what we started with.
   */
  private static void radixEncodeParseAndAssertEquals(Long value, int radix) {
    assertWithMessage("Radix: %s", radix)
        .that(Longs.tryParse(Long.toString(value, radix), radix))

然后我们创建一个 `Annotated` 的依赖项 `SessionDep` 来简化其他也会用到此依赖的代码。

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[25:30]  hl[25:27,30] *}

### 在启动时创建数据库表 { #create-database-tables-on-startup }

我们会在应用程序启动时创建数据库表。

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[32:37] hl[35:37] *}

此处，在应用程序启动事件中，我们创建了表。

在生产环境中，你可能会使用一个在启动应用程序之前运行的迁移脚本。🤓

/// tip | 提示