# Classes as Dependencies { #classes-as-dependencies }

Before diving deeper into the **Dependency Injection** system, let's upgrade the previous example.

## A `dict` from the previous example { #a-dict-from-the-previous-example }

In the previous example, we were returning a `dict` from our dependency ("dependable"):

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[9] *}

## Pydantic `Settings` { #pydantic-settings }

Fortunately, Pydantic provides a great utility to handle these settings coming from environment variables with <a href="https://docs.pydantic.dev/latest/concepts/pydantic_settings/" class="external-link" target="_blank">Pydantic: Settings management</a>.

		}

		for key := range constraints {
			if len(key) != 63 {
				t.Errorf("failed to find unique constraint, got %v", constraints)
			}
		}
	})

	t.Run("naming strategy", func(t *testing.T) {
		db, _ := gorm.Open(postgres.Open(postgresDSN), &gorm.Config{
			NamingStrategy: schema.NamingStrategy{},
		})

{{- end -}}

{{/*
Create a default fully qualified app name.
We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
If release name contains chart name it will be used as a full name.
*/}}
{{- define "minio.fullname" -}}
  {{- if .Values.fullnameOverride -}}
    {{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}

  Either the well was very deep, or she fell very slowly, for she
had plenty of time as she went down to look about her and to
wonder what was going to happen next.  First, she tried to look
down and make out what she was coming to, but it was too dark to
see anything; then she looked at the sides of the well, and
noticed that they were filled with cupboards and book-shelves;
here and there she saw maps and pictures hung upon pegs.  She

   *     the {@link ExecutionException} thrown by {@code input.get()} or, if {@code get()} throws a
   *     different kind of exception, that exception itself. To avoid hiding bugs and other
   *     unrecoverable errors, callers should prefer more specific types, avoiding {@code
   *     Throwable.class} in particular.

1. Read existing code first (use symbol overview tools)
2. Follow existing patterns
3. Add tests
4. Handle resources properly (try-with-resources)
5. Consider thread safety
6. Update JavaDoc

### When Fixing Bugs

1. Write failing test first
2. Understand root cause
3. Minimal changes
4. Verify no regressions

### When Refactoring

1. Preserve behavior
2. Keep tests green

        ensurePositive(xSumOfSquaresOfDeltas * ySumOfSquaresOfDeltas);
    return ensureInUnitRange(sumOfProductsOfDeltas / Math.sqrt(productOfSumsOfSquaresOfDeltas));
  }

  /**
   * Returns a linear transformation giving the best fit to the data according to <a
   * href="http://mathworld.wolfram.com/LeastSquaresFitting.html">Ordinary Least Squares linear

   -webkit-transform: perspective(400px) rotate3d(1, 0, 0, 90deg);\n    transform: perspective(400px) rotate3d(1, 0, 0, 90deg);\n    transition-timing-function: ease-in;\n    opacity: 0;\n  }\n  40% {\n    -webkit-transform: perspective(400px) rotate3d(1, 0, 0, -20deg);\n    transform: perspective(400px) rotate3d(1, 0, 0, -20deg);\n    transition-timing-function: ease-in;\n  }\n  60% {\n    -webkit-transform: perspective(400px) rotate3d(1, 0, 0, 10deg);\n    transform: perspective(400px) rotate3d(1,...

* network/cni: Bring up the `lo` interface for rkt ([#29310](https://github.com/kubernetes/kubernetes/pull/29310), [@euank](https://github.com/euank))
* Fixing kube-up for CVM masters. ([#29140](https://github.com/kubernetes/kubernetes/pull/29140), [@maisem](https://github.com/maisem))



# v1.3.4