///

////

Esse comando cria um novo ambiente virtual em um diretório chamado `.venv`.

/// details | `.venv` ou outro nome

Você pode criar o ambiente virtual em um diretório diferente, mas há uma convenção para chamá-lo de `.venv`.

///

## Ative o ambiente virtual

Ative o novo ambiente virtual para que qualquer comando Python que você executar ou pacote que você instalar o utilize.

# Virtual Environments

When you work in Python projects you probably should use a **virtual environment** (or a similar mechanism) to isolate the packages you install for each project.

/// info

If you already know about virtual environments, how to create them and use them, you might want to skip this section. 🤓

///

/// tip

A **virtual environment** is different than an **environment variable**.

  // Optimized scalar creation functions
  virtual AbstractTensorInterface* CreateInt64Scalar(int64_t value) = 0;
  virtual AbstractTensorInterface* CreateUint64Scalar(uint64 value) = 0;
  virtual AbstractTensorInterface* CreateInt32Scalar(int32_t value) = 0;
  virtual AbstractTensorInterface* CreateFloatScalar(float value) = 0;
  virtual AbstractTensorInterface* CreateDoubleScalar(double value) = 0;

                    },
                    "metadata": {
                      "filter_metadata": {
                        "istio": {
                          "config": "/apis/networking.istio.io/v1alpha3/namespaces/default/virtual-service/bookinfo"
                        }
                      }
                    },
                    "decorator": {
                      "operation": "productpage.default.svc.cluster.local:9080/productpage"

kind: VirtualService
metadata:
  name: valid-virtual-service2
spec:
  exportTo:
  - '.'
  hosts:
  - d
  http:
  - route:
    - destination:
        host: c
        subset: v1`
	validVirtualService2JSON = `{
"apiVersion": "networking.istio.io/v1alpha3",
"kind": "VirtualService",
"metadata": {
	"name": "valid-virtual-service2"
},
"spec": {
	"exportTo": [
	"."
	],

## Install `PyJWT`

We need to install `PyJWT` to generate and verify the JWT tokens in Python.

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

<div class="termy">

```console
$ pip install pyjwt

---> 100%
```

</div>

/// info

<div class="termy">

```console
$ C:\opt\custompython\bin\python
```

</div>

////

Эта информация будет полезна при изучении [Виртуальных окружений](virtual-environments.md){.internal-link target=_blank}.

## Вывод

Благодаря этому вы должны иметь базовое представление о том, что такое **переменные окружения** и как использовать их в Python.

/// info

To receive uploaded files, first install <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</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 python-multipart
```

This is because uploaded files are sent as "form data".

In the end, the ultimate objective is to be able to **serve your API clients** in a way that is **secure**, to **avoid disruptions**, and to use the **compute resources** (for example remote servers/virtual machines) as efficiently as possible. 🚀

### Virtual environment

Follow the instructions to create and activate a [virtual environment](virtual-environments.md){.internal-link target=_blank} for the internal code of `fastapi`.

### Install requirements using pip