////

### ✍ 🇨🇻 {🐍

👆 💪 ✍ 🌐 🔢 🏞 🐍, 📶 (⚖️ ⏮️ 🙆 🎏 👩‍🔬), & ⤴️ ✍ 👫 🐍.

🖼 👆 💪 ✔️ 📁 `main.py` ⏮️:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip

🥈 ❌ <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> 🔢 💲 📨.

   *               h -> ../a
   *               i/
   *                  j/
   *                     k
   *                     l/
   *            c
   *            d -> b/i
   *            e/
   *            f -> /dontdelete
   *      dontdelete/
   *         a
   *         b/
   *         c
   *      symlinktodir -> work/dir
   * </pre>
   */

例えば、<a href="https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files" class="external-link" target="_blank">ファイルを読み込むには`with`を使用することができます</a>:

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

その後の`open("./somefile.txt")`は「コンテキストマネージャ」と呼ばれるオブジェクトを作成します。

`with`ブロックが終了すると、例外があったとしてもファイルを確かに閉じます。

                    "-DvalNotFound=s${foz}i",
                    "-DvalRootDirectory=${session.rootDirectory}/.mvn/foo",
                    "-DvalTopDirectory=${session.topDirectory}/pom.xml",
                    "-f",
                    "${session.rootDirectory}/my-child",
                    "prefix:3.0.0:${foo}",
                    "validate"
                },
                null);

                                + " extracted from the -f/--file command-line argument " + arg + " does not exist");
                        throw new ExitException(1);
                    }
                } else {
                    System.err.println(
                            "POM file " + arg + " specified with the -f/--file command line argument does not exist");
                    throw new ExitException(1);

 * induced by this traverser.
 *
 * <p>For example, the tree
 *
 * <pre>{@code
 *        h
 *      / | \
 *     /  e  \
 *    d       g
 *   /|\      |
 *  / | \     f
 * a  b  c
 * }</pre>
 *
 * <p>can be iterated over in preorder (hdabcegf), postorder (abcdefgh), or breadth-first order
 * (hdegabcf).
 *
 * <p>Null nodes are strictly forbidden.
 *

		t.Fatalf("Transaction should get error when using cancelled context")
	}
}

func TestTransactionWithBlock(t *testing.T) {
	assertPanic := func(f func()) {
		defer func() {
			if r := recover(); r == nil {
				t.Fatalf("The code did not panic")
			}
		}()
		f()
	}

	// rollback
	err := DB.Transaction(func(tx *gorm.DB) error {
		user := *GetUser("transaction-block", Config{})

        public String name;

        @Option(name = "-w", aliases = "--webConfigIds", metaVar = "webConfigIds", usage = "Web Config IDs")
        public String webConfigIds;

        @Option(name = "-f", aliases = "--fileConfigIds", metaVar = "fileConfigIds", usage = "File Config IDs")
        public String fileConfigIds;

  // Assign to the variable, copying to the custom device.
  std::unique_ptr<TFE_TensorHandle, decltype(&TFE_DeleteTensorHandle)> one(
      TestScalarTensorHandle(context.get(), 111.f), TFE_DeleteTensorHandle);
  op.reset(TFE_NewOp(context.get(), "AssignVariableOp", status.get()));
  TFE_OpSetAttrType(op.get(), "dtype", TF_FLOAT);
  TFE_OpAddInput(op.get(), var_handle, status.get());

    };

    public static final char[] HEX_DIGITS = { 
        '0', '1', '2', '3', '4', '5',
        '6', '7', '8', '9', 'A', 'B',
        'C', 'D', 'E', 'F'
    };

/** 
 * Generate "hexdump" output of the buffer at src like the following:
 *
 * <p><blockquote><pre>
 * 00000: 04 d2 29 00 00 01 00 00 00 00 00 01 20 45 47 46  |..)......... EGF|