### Cài đặt Python và cập nhật biến môi trường `PATH`

Khi bạn cài đặt Python, bạn có thể được hỏi nếu bạn muốn cập nhật biến môi trường `PATH`.

//// tab | Linux, macOS

Giả sử bạn cài đặt Python vào thư mục `/opt/custompython/bin`.

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

  /**
   * Returns a list of delegate futures that correspond to the futures received in the order that
   * they complete. Delegate futures return the same value or throw the same exception as the
   * corresponding input future returns/throws.
   *
   * <p>"In the order that they complete" means, for practical purposes, about what you would
   * expect, but there are some subtleties. First, we do guarantee that, if the output future at

        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);

          .that(ex.getMessage().contains(String.valueOf(value)))
          .isTrue();
    }
  }

  // We need to test that our method behaves like the JDK method.
  @SuppressWarnings("InlineMeInliner")
  public void testCompare() {
    for (char x : VALUES) {
      for (char y : VALUES) {
        assertWithMessage(x + ", " + y)
            .that(Math.signum(Chars.compare(x, y)))

# Những bước đầu tiên

Tệp tin FastAPI đơn giản nhất có thể trông như này:

{* ../../docs_src/first_steps/tutorial001.py *}

Sao chép sang một tệp tin `main.py`.

Chạy live server:

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
<span style="color: green;">INFO</span>:     Started reloader process [28720]

   *
   * <p><b>Note:</b> Despite what the method name suggests, if {@code elements} is an {@code
   * ImmutableSortedSet}, it may be returned instead of a copy.
   *
   * <p>This method is not type-safe, as it may be called on elements that are not mutually
   * comparable.
   *
   * <p>This method is safe to use even when {@code elements} is a synchronized or concurrent
   * collection that is currently being modified by another thread.

        return true;
      }
      if (object instanceof LongArrayAsList) {
        LongArrayAsList that = (LongArrayAsList) object;
        int size = size();
        if (that.size() != size) {
          return false;
        }
        for (int i = 0; i < size; i++) {
          if (array[start + i] != that.array[that.start + i]) {
            return false;
          }
        }
        return true;
      }

    try {
      Hashing.hmacMd5(badKey);
      fail();
    } catch (IllegalArgumentException expected) {
    } catch (NullPointerException toleratedOnAndroid) {
      // TODO(cpovirk): In an ideal world, we'd check here that we're running on Android.
    }
  }

  public void testEmptyInputs() throws Exception {
    String knownOutput = "8cbf764cbe2e4623d99a41354adfd390";

    Mac mac = Mac.getInstance("HmacMD5");

   * characters). That is consistent with {@link InetAddress}, but not with various RFCs. If you
   * want to accept ASCII digits only, you can use something like {@code
   * CharMatcher.ascii().matchesAllOf(ipString)}.
   *
   * <p>Note that if this method returns {@code true}, a call to {@link #forString(String)} can
   * still throw if the address has a scope ID that fails validation against the interfaces on the

	if cannotHeal && quorumETag != "" {
		// This is an object that is supposed to be removed by the dangling code
		// but we noticed that ETag is the same for all objects, let's give it a shot
		cannotHeal = false
	}

	if !latestMeta.Deleted && !latestMeta.IsRemote() {
		// check if there is a part that lost its quorum
		for _, partErrs := range dataErrsByPart {