# Dependencies - `Depends()` and `Security()`

## `Depends()`

Dependencies are handled mainly with the special function `Depends()` that takes a callable.

Here is the reference for it and its parameters.

You can import it directly from `fastapi`:

```python
from fastapi import Depends
```

::: fastapi.Depends

## `Security()`

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

**Additional context**

client = TestClient(app)


def test_path_operation():
    response = client.get("/items/foo")
    assert response.status_code == 200, response.text
    assert response.json() == {"id": "foo", "value": "there goes my hero"}


def test_path_operation_not_found():
    response = client.get("/items/bar")
    assert response.status_code == 404, response.text
    assert response.json() == {"message": "Item not found"}

        the<JavaPluginExtension>().toolchain {
            // if you change this java version please also consider changing .idea/misc.xml#project/component(@project-jdk-name}
            // Also, there are a lot of other places this should be changed.
            languageVersion = JavaLanguageVersion.of(17)
            vendor = JvmVendorSpec.ADOPTIUM
        }
    }

  }

  @Test
  fun encodeMultiplePairs() {
    val body =
      FormBody.Builder()
        .add("sim", "ple")
        .add("hey", "there")
        .add("help", "me")
        .build()
    val expected = "sim=ple&hey=there&help=me"
    assertThat(body.contentLength()).isEqualTo(expected.length.toLong())
    val buffer = Buffer()
    body.writeTo(buffer)

# Define this here and not in the main mkdocs.yml file because that one is auto
# updated and written, and the script would remove the env var
INHERIT: !ENV [INSIDERS_FILE, '../en/mkdocs.no-insiders.yml']
markdown_extensions:
  pymdownx.highlight:

#
# The original version of this file is located in the https://github.com/istio/common-files repo.
# If you're looking at this file in a different repo and want to make a change, please go to the
# common-files repo, make the change there and check it in. Then come back to this repo and run
# "make update-common".

# Copyright Istio Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");

  // which overrides ImmutableSet & which ImmutableSortedSet extends.
  // It is necessary here because otherwise the builder() method
  // would be inherited from the emulated ImmutableSet.
  // TODO(cpovirk): should we be including other methods from the shim here and
  // in ImmutableSortedMap?
  @Deprecated
  public static <E> ImmutableSortedSet.Builder<E> builder() {

This directory is intended to contain Redisson [1] JARs for Maven Resolver Named Locks using Redisson.

See here [2] on how to add necessary JARs.

[1] https://github.com/redisson/redisson

 * Google patches: various bugfixes, lastAccess support, retrying requests
 * A proper test suite
 * Various fixes

## Others

### This jcifs or jcifs-ng

jcifs-ng will be a proper choice for many users. 
There are a lot of SMB devices in the world.
Some of them only work with the old jcifs library.
If you want to support many SMB devices, CodeLibs jcifs library will be helpful.