## 의존성으로서의 클래스 { #classes-as-dependencies_1 }

파이썬 클래스의 인스턴스를 만들 때도 같은 문법을 사용한다는 것을 알 수 있을 겁니다.

예를 들어:

```Python
class Cat:
    def __init__(self, name: str):
        self.name = name


fluffy = Cat(name="Mr Fluffy")
```

이 경우 `fluffy`는 클래스 `Cat`의 인스턴스입니다.

그리고 `fluffy`를 만들기 위해 `Cat`을 "호출"하고 있습니다.

따라서 파이썬 클래스도 **호출 가능(callable)**합니다.

그러면 **FastAPI**에서는 파이썬 클래스를 의존성으로 사용할 수 있습니다.

    /**
     * Whether to exclude strings that consist only of whitespace from the operation.
     */
    protected boolean excludesWhitespace = false;

    /**
     * The prefix.
     */
    protected String prefix;

    /**
     * Delimiter for JavaBeans.
     */
    protected char beanDelimiter = '$';

    /**
     * Delimiter for Map.
     */
    protected char mapDelimiter = '.';

    /**

  }

  /**
   * Generates test cases for the given combination of scenario and timeouts. For methods that take
   * an explicit timeout value, all of the given timeoutsToUse result in individual test cases. For
   * methods that do not take an explicit timeout value, a single test case is generated only if the
   * implicit timeout of that method matches the given timeoutsToUse. For example, enter() is

    int minLen = Math.min(nodeLabelLen, labelLen);
    for (int i = 0; i < minLen; i++) {
      char c1 = label.charAt(i);
      char c2 = stringPool.charAt(offset + 1 + i);
      if (c1 != c2) {
        return c1 - c2;
      }
    }
    return labelLen - nodeLabelLen;
  }

  /**
   * A CharSequence that is composed of multiple chunks. This is used to work around the 64k size
   * limit for string literals in Java.

                @Override
                public String toString() {
                    return name;
                }

                @Override
                public char charAt(final int index) {
                    return name.charAt(index);
                }

                @Override
                public int length() {
                    return name.length();

        break;
      }
    }
  }

  /**
   * Exactly like signalNextWaiter, but caller guarantees that guardToSkip need not be considered,
   * because caller has previously checked that guardToSkip.isSatisfied() returned false. An
   * optimization for the case that guardToSkip.isSatisfied() may be expensive.
   *

		return true
	default:
		return false
	}
}

// bgContext returns a context that can be used for async operations.
// Cancellation/timeouts are removed, so parent cancellations/timeout will
// not propagate from parent.
// Context values are preserved.
// This can be used for goroutines that live beyond the parent context.
func bgContext(parent context.Context) context.Context {

            writer: DerWriter,
            value: String,
          ) = writer.writeUtf8(value)
        },
    )

  /**
   * Based on International Alphabet No. 5. Note that there are bytes that IA5 and US-ASCII
   * disagree on interpretation.
   *
   * TODO(jwilson): constrain to IA5 characters.
   */
  val IA5_STRING =
    BasicDerAdapter(
      name = "IA5 STRING",

		// so we leave it out. It should be covered via
		// the ReadSlice test since ReadLine simply calls
		// ReadSlice, and it's that function that handles
		// the last byte.
	}

	// Try all readers with UnreadByte.
	for rno, read := range readers {
		// Some input data that is longer than the minimum reader buffer size.
		const n = 10
		var buf bytes.Buffer
		for i := 0; i < n; i++ {

        return new String(factory.getSinkContents(), UTF_8);
      }

      @Override
      public String getExpected(String data) {
        /*
         * Get what the byte sink factory would expect for no written bytes, then append expected
         * string to that.
         */
        byte[] factoryExpectedForNothing = factory.getExpected(new byte[0]);
        return new String(factoryExpectedForNothing, UTF_8) + checkNotNull(data);