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このページの2つのバージョン間の差分を表示します。

--- python:emmett [2024/06/22 13:08] – [プロジェクトの作成] ともやん
+++ python:emmett [2024/06/24 08:03] (現在) – [参考文献] ともやん
@@ 行 1: / 行 1: @@
 ====== Emmett - 非同期 Web アプリケーション フレームワーク ======
+<WRAP zoomimg w400 x1_3 minfont_10>
+{{ :python:dr._emmett_brown_doc.webp |Dr. Emmett Brown}}\\
+[[https://greatcharacters.miraheze.org/wiki/Dr._Emmett_Brown|Dr. Emmett Brown - Incredible Characters Wiki]]\\
+[[https://greatcharacters.miraheze.org/wiki/File:Doc_-_BackTTFuture_067Pyxurz.jpg|File:Doc - BackTTFuture 067Pyxurz.jpg - Incredible Characters Wiki]] より\\
+</WRAP>
 本家: [[https://emmett.sh|Emmett - the web framework for inventors]]\\
 ソースコード: [[git>emmett-framework/emmett|emmett-framework/emmett: The web framework for inventors]]\\
 ===== Emmett チュートリアル =====
+公式: [[https://emmett.sh/docs/2.5.x/tutorial|Tutorial | Emmett framework]]\\
 <WRAP color_term>
 <WRAP color_command><html><pre>
@@ 行 163: / 行 170: @@
 (.venv) <font color="#0087FF"><b>$</b></font> <font color="#26A269">pip</font> install emmett
 </pre></html></WRAP>
-<WRAP color_result_long><html><pre>
+<WRAP color_result_hlong><html><pre>
 Collecting emmett
   Downloading emmett-2.5.11-py3-none-any.whl.metadata (4.8 kB)
@@ 行 224: / 行 231: @@
 </pre></html></WRAP>
 </WRAP>
+===== 技術情報 =====
+==== Emmett は ASGI ではなく RSGI で動作する...🤔 ====
+Granian HTTPサーバーはASGI 代替プロトコルRSGI(Rust Server Gateway Interface)を実装してて、Emmett 2.5 で使用されるデフォルトのプロトコル、uvicorn への依存は削除されてる🤔\\
+コードを変更することなく、Webアプリケーションのパフォーマンスが約 50%  向上してる😍\\
+[[https://emmett.sh/docs/2.5.x/upgrading|Upgrading to newer releases | Emmett framework]]\\
+[[https://github.com/emmett-framework/granian/blob/master/docs/spec/RSGI.md|RSGI Specification - granian/docs/spec/RSGI.md at master · emmett-framework/granian]]\\
+==== データベース URL に指定可能な文字列の例...🤔 ====
+公式: [[https://pydal.readthedocs.io/en/latest/|Welcome to pyDAL’s API documentation! — pyDAL 17.11 documentation]]\\
+Emmett は内部で [[http://www.web2py.com/|web2py]] Web フレームワーク 由来の pyDAL を利用するので、そのドキュメントに記載がある😉\\
+<WRAP color_term>
+<WRAP color_mincode><code python>
+'sqlite://test.db'
+'spatialite://test.db'
+'sqlite:memory'
+'spatialite:memory'
+'jdbc:sqlite://test.db'
+'mysql://root:none@localhost/test'
+'postgres://mdipierro:password@localhost/test'
+'postgres:psycopg2://mdipierro:password@localhost/test'
+'postgres:pg8000://mdipierro:password@localhost/test'
+'jdbc:postgres://mdipierro:none@localhost/test'
+'mssql://web2py:none@A64X2/web2py_test'
+'mssql2://web2py:none@A64X2/web2py_test' # alternate mappings
+'mssql3://web2py:none@A64X2/web2py_test' # better pagination (requires >= 2005)
+'mssql4://web2py:none@A64X2/web2py_test' # best pagination (requires >= 2012)
+'oracle://username:password@database'
+'firebird://user:password@server:3050/database'
+'db2:ibm_db_dbi://DSN=dsn;UID=user;PWD=pass'
+'db2:pyodbc://driver=DB2;hostname=host;database=database;uid=user;pwd=password;port=port'
+'firebird://username:password@hostname/database'
+'firebird_embedded://username:password@c://path'
+'informix://user:password@server:3050/database'
+'informixu://user:password@server:3050/database' # unicode informix
+'ingres://database'  # or use an ODBC connection string, e.g. 'ingres://dsn=dsn_name'
+'google:datastore' # for google app engine datastore (uses ndb by default)
+'google:sql' # for google app engine with sql (mysql compatible)
+'teradata://DSN=dsn;UID=user;PWD=pass; DATABASE=database' # experimental
+'imap://user:password@server:port' # experimental
+'mongodb://user:password@server:port/database' # experimental
+</code></WRAP>
+</WRAP>
+===== トラブルシューティング =====
+==== RuntimeError: No driver of supported ones ('psycopg2', 'pg8000') is available ====
+PostgreSQL に接続する際に以下の内容のようなエラーが発生する...😱\\
+<WRAP color_term>
+<WRAP color_result><html><pre>
+  File &quot;/home/tomoyan/my_projects/emmett_proj/.venv/lib64/python3.12/site-packages/pydal/adapters/base.py&quot;, line 367, in __init__
+    super(SQLAdapter, self).__init__(*args, **kwargs)
+  File &quot;/home/tomoyan/my_projects/emmett_proj/.venv/lib64/python3.12/site-packages/pydal/adapters/base.py&quot;, line 49, in __init__
+    self.find_driver()
+  File &quot;/home/tomoyan/my_projects/emmett_proj/.venv/lib64/python3.12/site-packages/pydal/adapters/base.py&quot;, line 98, in find_driver
+    raise RuntimeError(
+RuntimeError: No driver of supported ones (&apos;psycopg2&apos;, &apos;pg8000&apos;) is available
+</pre></html></WRAP>
+</WRAP>
+PostgreSQL ドライバをインストールする必要がある🤔\\
+<WRAP color_term>
+<WRAP color_command><html><pre>
+(.venv) <font color="#0087FF"><b>$</b></font> <font color="#26A269">pip</font> install psycopg2
+</pre></html></WRAP>
+<WRAP color_result><html><pre>
+Collecting psycopg2
+  Downloading psycopg2-2.9.9.tar.gz (384 kB)
+     <font color="#729C1F">━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━</font> <font color="#26A269">384.9/384.9 kB</font> <font color="#C01C28">27.4 kB/s</font> eta <font color="#2AA1B3">0:00:00</font>
+  Installing build dependencies ... done
+  Getting requirements to build wheel ... done
+  Preparing metadata (pyproject.toml) ... done
+Building wheels for collected packages: psycopg2
+  Building wheel for psycopg2 (pyproject.toml) ... done
+  Created wheel for psycopg2: filename=psycopg2-2.9.9-cp312-cp312-linux_x86_64.whl size=170256 sha256=2e90e7bb4e1ff74e850d424bfbc9bf7c017ffbb1c37b42d79b550d13f29af782
+  Stored in directory: /home/tomoyan/.cache/pip/wheels/ff/ac/80/7ccec163e3d05ae2112311b895132409b9abfd7e0c1c6b5183
+Successfully built psycopg2
+Installing collected packages: psycopg2
+Successfully installed psycopg2-2.9.9
+</pre></html></WRAP>
+</WRAP>
+===== 参考文献 =====
+[[https://towardsdatascience.com/elegant-web-development-with-emmett-in-python-612ed898a71e|Elegant Web Development With Emmett In Python | by Emma Boudreau | Towards Data Science]]\\
+[[https://medium.com/@pangea.ai/the-ultimate-guide-to-python-development-frameworks-2021-d5f3daad75c6|The Ultimate Guide to Python Development Frameworks 2021 | by Pangea.ai | Medium]]\\
+[[https://medium.com/@carlosmarcano2704/seven-alternatives-to-fastapi-to-explore-and-contribute-python-47bcd394bf31|Seven Alternatives To FastAPI To Explore and Contribute To | Python | by Carlos Armando Marcano Vargas | Medium]]\\
+==== 付録 ====
+[[tw>tomoyan596sp/status/1804386410151223725|誰のホームページを作ってるんでしょうね...🤔 Dr. Emmett Brown 博士😅 ドッグが由来らしいPythonのEmmettフレームワーク🤔 真の非同期 Web アプリケーション フレームワークだから...😊 ASGIサーバーはRustで実装されてるGranian、weppyをforkしたEmmettは、Flaskに似てるがDjangoくらい高機能です😋]]\\