To use `EmailStr`, first install <a href="https://github.com/JoshData/python-email-validator" class="external-link" target="_blank">`email-validator`</a>.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install it, for example:

```console
$ pip install email-validator
```

or with:

```console
$ pip install "pydantic[email]"
```

///

# Участие в разработке фреймворка

Возможно, для начала Вам стоит ознакомиться с основными способами [помочь FastAPI или получить помощь](help-fastapi.md){.internal-link target=_blank}.

## Разработка

Если Вы уже склонировали репозиторий и знаете, что Вам нужно более глубокое погружение в код фреймворка, то здесь представлены некоторые инструкции по настройке виртуального окружения.

### Виртуальное окружение с помощью `venv`

    private static final int CHUNK_SIZE = 8;

    // The number of compression rounds.
    private final int c;
    // The number of finalization rounds.
    private final int d;

    // Four 64-bit words of internal state.
    // The initial state corresponds to the ASCII string "somepseudorandomlygeneratedbytes",
    // big-endian encoded. There is nothing special about this value; the only requirement

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package event

import (
	"context"
	"crypto/rand"
	"errors"
	"reflect"
	"testing"
	"time"

	"github.com/minio/minio/internal/store"
)

type ExampleTarget struct {
	id       TargetID
	sendErr  bool
	closeErr bool
}

func (target ExampleTarget) ID() TargetID {
	return target.id
}

            <template>writer-stax.vm</template>
          </templates>
          <params>
            <param>packageModelV4=org.apache.maven.api.cli.extensions</param>
            <param>packageToolV4=org.apache.maven.cli.internal.extension.io</param>
          </params>
          <velocityBasedir>${project.basedir}/../../src/mdo</velocityBasedir>
        </configuration>
        <executions>
          <execution>

但本节以 `PATCH` 为例的原因是，该操作就是为了这种用例创建的。

///

/// note | "笔记"

注意，输入模型仍需验证。

因此，如果希望接收的部分更新数据可以省略其他所有属性，则要把模型中所有的属性标记为可选（使用默认值或 `None`）。

为了区分用于**更新**所有可选值的模型与用于**创建**包含必选值的模型，请参照[更多模型](extra-models.md){.internal-link target=_blank} 一节中的思路。

of them that contain failures into one file. The TensorFlow DevInfra team
uses this to generate a simple overview of an entire pip and nonpip test
invocation, since the normal logs that Bazel creates are too large for the
internal invocation viewer.
"""
import collections
import os
import re
import subprocess
import sys
from junitparser import JUnitXml

result = JUnitXml()
try:
  files = subprocess.check_output(

import org.apache.maven.api.model.PluginExecution;
import org.apache.maven.api.services.LifecycleRegistry;
import org.apache.maven.api.services.PackagingRegistry;
import org.apache.maven.internal.impl.model.DefaultLifecycleBindingsInjector;

import static org.apache.maven.api.Lifecycle.DEFAULT;

@Singleton
@Named
@Priority(5)
@Deprecated

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.repository.internal;

import java.io.File;
import java.nio.file.Path;
import java.util.Map;
import java.util.Objects;

import org.eclipse.aether.artifact.AbstractArtifact;
import org.eclipse.aether.artifact.Artifact;

/**

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.repository.internal.util;

import java.io.PrintStream;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.Locale;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;