Допустим, вы устанавливаете Python, и он оказывается в каталоге `/opt/custompython/bin`.

Если вы скажете «да», чтобы обновить переменную окружения `PATH`, то программа установки добавит `/opt/custompython/bin` в переменную окружения `PATH`.

Это может выглядеть следующим образом:

```plaintext
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/custompython/bin
```

فرض کن پایتون رو نصب کردی و توی یه پوشه `/opt/custompython/bin` قرار گرفته.

اگه بگی بله برای به‌روزرسانی متغیر محیطی `PATH`، نصاب `/opt/custompython/bin` رو به متغیر محیطی `PATH` اضافه می‌کنه.

ممکنه اینجوری بشه:

```plaintext
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/custompython/bin
```

//// tab | লিনাক্স, ম্যাকওএস

ধরা যাক আপনি পাইথন ইনস্টল করলেন এবং এটি `/opt/custompython/bin` ডিরেক্টরিতে ইনস্টল হচ্ছে।

যদি আপনি "Yes" সিলেক্ট করে `PATH` এনভায়রনমেন্ট ভেরিয়েবল আপডেট করতে চান, তাহলে ইনস্টলার `/opt/custompython/bin` কে `PATH` এনভায়রনমেন্ট ভেরিয়েবল এ এড করে দিবে।

এটা দেখতে এমনটা হতে পারেঃ

```plaintext
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/custompython/bin
```

////

//// tab | Windows

Giả sử bạn cài đặt Python vào thư mục `C:\opt\custompython\bin`.

Nếu bạn chọn cập nhật biến môi trường `PATH`, thì cài đặt sẽ thêm `C:\opt\custompython\bin` vào biến môi trường `PATH`.

Nó có thể có dạng như sau:

```plaintext
C:\Program Files\Python312\Scripts;C:\Program Files\Python312;C:\Windows\System32;C:\opt\custompython\bin

            OptionalEntity<Integer> opt = OptionalUtil.ofNullable(i);
            assertTrue(opt.isPresent());
            assertEquals(Integer.valueOf(i), opt.get());
        }

        // Test creating many empty OptionalEntity instances
        for (int i = 0; i < 1000; i++) {
            OptionalEntity<Integer> opt = OptionalUtil.ofNullable((Integer) null);
            assertFalse(opt.isPresent());
        }
    }

    Note over dep: Ejecutar código hasta yield
    opt raise Exception
        dep -->> handler: Lanzar Exception
        handler -->> client: Response HTTP de error
    end
    dep ->> operation: Ejecutar dependencia, por ejemplo, sesión de BD
    opt raise
        operation -->> dep: Lanzar Exception (por ejemplo, HTTPException)
        opt handle

	for _, opt := range opts {
		str := stmt.Quote(opt.DBName)
		if opt.Expression != "" {
			str = opt.Expression
		} else if opt.Length > 0 {
			str += fmt.Sprintf("(%d)", opt.Length)
		}

		if opt.Collate != "" {
			str += " COLLATE " + opt.Collate
		}

		if opt.Sort != "" {
			str += " " + opt.Sort
		}
		results = append(results, clause.Expr{SQL: str})

		}
	}

	var skipAfterInitialize bool
	for _, opt := range opts {
		if opt != nil {
			if applyErr := opt.Apply(config); applyErr != nil {
				return nil, applyErr
			}
			defer func(opt Option) {
				if skipAfterInitialize {
					return
				}
				if errr := opt.AfterInitialize(db); errr != nil {
					err = errr
				}
			}(opt)
		}
	}

    Note over client,operation: Response is already sent, can't change it anymore
    opt Tasks
        operation -->> tasks: Send background tasks
    end
    opt Raise other exception
        tasks -->> dep: Raise other exception
    end
    Note over dep: After yield
    opt Handle other exception
        dep -->> dep: Handle exception, can't change response. E.g. close DB session.
    end
```

    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise Exception
        dep -->> handler: Raise Exception
        handler -->> client: HTTP error response
    end
    dep ->> operation: Run dependency, e.g. DB session
    opt raise
        operation -->> dep: Raise Exception (e.g. HTTPException)
        opt handle