Type declarations come in two forms: alias declarations and type definitions.
</p>

<pre class="ebnf">
TypeDecl = "type" ( TypeSpec | "(" { TypeSpec ";" } ")" ) .
TypeSpec = AliasDecl | TypeDef .
</pre>

<h4 id="Alias_declarations">Alias declarations</h4>

<p>
An alias declaration binds an identifier to the given type
[<a href="#Go_1.9">Go 1.9</a>].
</p>

if we can't read the keys. ACCESS=$(cat /config/rootUser) ; SECRET=$(cat /config/rootPassword) ; set +e ; # The connections to minio are allowed to fail. echo "Connecting to MinIO server: $SCHEME://$MINIO_ENDPOINT:$MINIO_PORT" ; MC_COMMAND="${MC} alias set myminio $SCHEME://$MINIO_ENDPOINT:$MINIO_PORT $ACCESS $SECRET" ; $MC_COMMAND ; STATUS=$? ; until [ $STATUS = 0 ] do ATTEMPTS=`expr $ATTEMPTS + 1` ; echo \"Failed attempts: $ATTEMPTS\" ; if [ $ATTEMPTS -gt $LIMIT ]; then exit 1 ; fi ; sleep 2 ;...

if we can't read the keys. ACCESS=$(cat /config/rootUser) ; SECRET=$(cat /config/rootPassword) ; set +e ; # The connections to minio are allowed to fail. echo "Connecting to MinIO server: $SCHEME://$MINIO_ENDPOINT:$MINIO_PORT" ; MC_COMMAND="${MC} alias set myminio $SCHEME://$MINIO_ENDPOINT:$MINIO_PORT $ACCESS $SECRET" ; $MC_COMMAND ; STATUS=$? ; until [ $STATUS = 0 ] do ATTEMPTS=`expr $ATTEMPTS + 1` ; echo \"Failed attempts: $ATTEMPTS\" ; if [ $ATTEMPTS -gt $LIMIT ]; then exit 1 ; fi ; sleep 2 ;...

if we can't read the keys. ACCESS=$(cat /config/rootUser) ; SECRET=$(cat /config/rootPassword) ; set +e ; # The connections to minio are allowed to fail. echo "Connecting to MinIO server: $SCHEME://$MINIO_ENDPOINT:$MINIO_PORT" ; MC_COMMAND="${MC} alias set myminio $SCHEME://$MINIO_ENDPOINT:$MINIO_PORT $ACCESS $SECRET" ; $MC_COMMAND ; STATUS=$? ; until [ $STATUS = 0 ] do ATTEMPTS=`expr $ATTEMPTS + 1` ; echo \"Failed attempts: $ATTEMPTS\" ; if [ $ATTEMPTS -gt $LIMIT ]; then exit 1 ; fi ; sleep 2 ;...

```

しかし、`Annotated` を使用しているので、その `Annotated` 値を変数に格納して複数箇所で使えます:

{* ../../docs_src/dependencies/tutorial001_02_an_py310.py hl[12,16,21] *}

/// tip | 豆知識

これはただの標準 Python で、「type alias」と呼ばれ、**FastAPI** 固有のものではありません。

しかし **FastAPI** は `Annotated` を含む Python 標準に基づいているため、このテクニックをコードで使えます。 😎

///

TF_CAPI_EXPORT extern TFE_TensorHandle* TFE_TensorHandleCopySharingTensor(
    TFE_TensorHandle* h, TF_Status* status);

// This function will block till the operation that produces `h` has
// completed. The memory returned might alias the internal memory used by
// TensorFlow. Hence, callers should not mutate this memory (for example by
// modifying the memory region pointed to by TF_TensorData() on the returned
// TF_Tensor).

if we can't read the keys. ACCESS=$(cat /config/rootUser) ; SECRET=$(cat /config/rootPassword) ; set +e ; # The connections to minio are allowed to fail. echo "Connecting to MinIO server: $SCHEME://$MINIO_ENDPOINT:$MINIO_PORT" ; MC_COMMAND="${MC} alias set myminio $SCHEME://$MINIO_ENDPOINT:$MINIO_PORT $ACCESS $SECRET" ; $MC_COMMAND ; STATUS=$? ; until [ $STATUS = 0 ] do ATTEMPTS=`expr $ATTEMPTS + 1` ; echo \"Failed attempts: $ATTEMPTS\" ; if [ $ATTEMPTS -gt $LIMIT ]; then exit 1 ; fi ; sleep 2 ;...

ACCESS_KEY=$(kubectl get secret {{ template "minio.secretName" . }} -o jsonpath="{.data.rootUser}" | base64 --decode) 3. export SECRET_KEY=$(kubectl get secret {{ template "minio.secretName" . }} -o jsonpath="{.data.rootPassword}" | base64 --decode) 4. mc alias set {{ template "minio.fullname" . }}-local http://localhost:{{ .Values.service.port }} "$ACCESS_KEY" "$SECRET_KEY" --api s3v4 5. mc ls {{ template "minio.fullname" . }}-local Alternately, you can use your browser or the Minio SDK to access the server...

ACCESS_KEY=$(kubectl get secret {{ template "minio.secretName" . }} -o jsonpath="{.data.rootUser}" | base64 --decode) 3. export SECRET_KEY=$(kubectl get secret {{ template "minio.secretName" . }} -o jsonpath="{.data.rootPassword}" | base64 --decode) 4. mc alias set {{ template "minio.fullname" . }}-local http://localhost:{{ .Values.service.port }} "$ACCESS_KEY" "$SECRET_KEY" --api s3v4 5. mc ls {{ template "minio.fullname" . }}-local Alternately, you can use your browser or the Minio SDK to access the server...

ACCESS_KEY=$(kubectl get secret {{ template "minio.secretName" . }} -o jsonpath="{.data.rootUser}" | base64 --decode) 3. export SECRET_KEY=$(kubectl get secret {{ template "minio.secretName" . }} -o jsonpath="{.data.rootPassword}" | base64 --decode) 4. mc alias set {{ template "minio.fullname" . }}-local http://localhost:{{ .Values.service.port }} "$ACCESS_KEY" "$SECRET_KEY" --api s3v4 5. mc ls {{ template "minio.fullname" . }}-local Alternately, you can use your browser or the Minio SDK to access the server...