Hơn nữa, tuỳ vào hệ điều hành của bạn (vd Linux, Windows, macOS), có thể đã có Python được cài đặt sẵn. Trong trường hợp ấy, một vài gói nhiều khả năng đã được cài đặt trước với các phiên bản **cần thiết cho hệ thống của bạn**. Nếu bạn cài đặt các gói trong môi trường Python toàn cục, bạn có thể sẽ **phá vỡ** một số chương trình đã được cài đặt sẵn cùng hệ thống.

     * this is no worse than what FutureTask does in that situation. Additionally, because the
     * Future was cancelled, its listeners have been run, so its consumers will not hang.
     *
     * Contrast this to the situation we have if setResult() throws, a situation described below.
     */
    I sourceResult;
    try {
      sourceResult = getDone(localInputFuture);

       * Luckily, we don't care about analyzing tests at all. We'd skip them all if we could do so
       * trivially, but it's enough to skip these ones.
       */
      ) {
        continue;
      }
      Class<?> clazz = info.load();
      try {
        Method unused = clazz.getDeclaredMethod("writeReplace");
        continue; // It overrides writeReplace, so it's safe.
      } catch (NoSuchMethodException e) {

 * Iterator#remove} operations. This utility takes the brute-force approach of trying <i>all</i>
 * possible sequences of these operations, up to a given number of steps. So, if the caller
 * specifies to use <i>n</i> steps, a total of <i>3^n</i> tests are actually performed.
 *
 * <p>For instance, if <i>steps</i> is 5, one example sequence that will be tested is:
 *
 * <ol>
 *   <li>remove();

So let's focus on the main cases, where it could crash entirely in some particular cases **in the future**, and it still makes sense to restart it.

///

    this.delegate = delegate;
    this.validator = validator;
    this.errorMessage = errorMessage;
  }

  // Override hashCode() to access delegate directly (so that it doesn't trigger the validate() call
  // via delegate()); it seems inappropriate to throw ISE on this method.
  @Override
  public int hashCode() {
    return delegate.hashCode();
  }

      // Should be impossible, but we want to return *something* so that class init succeeds.
      return new ThrowingCreator();
    } catch (IllegalAccessException e) {
      // ditto
      return new ThrowingCreator();
    }

    // Android isolates apps' temporary directories since Jelly Bean:
    // https://github.com/google/guava/issues/4011#issuecomment-770020802

./mvnw clean install --projects '!guava-testlib,!guava-tests,!guava-bom' -Dmaven.test.skip=true -Dmaven.javadoc.skip=true -f android

# We run this separately so that its change to the default toolchain doesn't affect anything else.
# (And we run it after the main build so that that build has already downloaded Java 11 if necessary.)
./mvnw --projects '!guava-testlib,!guava-tests,!guava-bom,!guava-gwt' initialize -P print-java-11-home

Tôi sẽ chỉ ra một số khái niệm chính cần thiết khi triển khai một ứng dụng **FastAPI** (mặc dù hầu hết nó áp dụng cho bất kỳ loại ứng dụng web nào).

      // requested by the user. Do not allow edits so we do not go over that limit any further. If
      // the journal rebuild failed, the journal writer will not be active, meaning we will not be
      // able to record the edit, causing file leaks. In both cases, we want to retry the clean up
      // so we can get out of this state!
      cleanupQueue.schedule(cleanupTask)
      return null
    }