& 🚥 👥 🤙:

```Python
print(user_dict)
```

👥 🔜 🤚 🐍 `dict` ⏮️:

```Python
{
    'username': 'john',
    'password': 'secret',
    'email': '******@****.***',
    'full_name': None,
}
```

#### 🎁 `dict`

🚥 👥 ✊ `dict` 💖 `user_dict` & 🚶‍♀️ ⚫️ 🔢 (⚖️ 🎓) ⏮️ `**user_dict`, 🐍 🔜 "🎁" ⚫️. ⚫️ 🔜 🚶‍♀️ 🔑 & 💲 `user_dict` 🔗 🔑-💲 ❌.

, ▶️ ⏮️ `user_dict` ⚪️➡️ 🔛, ✍:

```Python

   * [WindowCounter] generally carries the client view of total and acked bytes.
   */
  fun receivingConnectionWindowChanged(windowCounter: WindowCounter)

  /** Noop implementation */
  object None : FlowControlListener {
    override fun receivingStreamWindowChanged(
      streamId: Int,
      windowCounter: WindowCounter,
      bufferSize: Long,
    ) {
    }

                return MinimalSet.of(elements);
              }
            })
        .named("MinimalSet")
        .withFeatures(
            CollectionFeature.ALLOWS_NULL_VALUES, CollectionFeature.NONE, CollectionSize.ANY)
        .createTestSuite();
  }

    public PagerCreator(final NamingConvention namingConvention) {
        super(namingConvention);
        setNameSuffix(SUFFIX);
        setInstanceDef(InstanceDefFactory.SESSION);
        setAutoBindingDef(AutoBindingDefFactory.NONE);
    }

    public ComponentCustomizer getPagerCustomizer() {
        return getCustomizer();
    }

    public void setPagerCustomizer(final ComponentCustomizer customizer) {
        setCustomizer(customizer);

            DcerpcHandle handle = mock(DcerpcHandle.class);
            LsaPolicyHandle policy = mock(LsaPolicyHandle.class);
            jcifs.SID[] none = new jcifs.SID[0];

            cache.resolveSids(handle, policy, none);
            verify(handle, times(1)).sendrecv(any(jcifs.dcerpc.msrpc.MsrpcLookupSids.class));
        }
    }

   * `route` is the resolved route for a connection.
   */
  internal fun isEligible(
    address: Address,
    routes: List<Route>?,
  ): Boolean {
    assertLockHeld()

    // If this connection is not accepting new exchanges, we're done.
    if (calls.size >= allocationLimit || noNewExchanges) return false

```

`Optional[str]` ব্যবহার করা মানে হল শুধু `str` নয়, এটি হতে পারে `None`-ও, যা আপনার এডিটরকে সেই ত্রুটিগুলি শনাক্ত করতে সাহায্য করবে যেখানে আপনি ধরে নিচ্ছেন যে একটি মান সবসময় `str` হবে, অথচ এটি `None`-ও হতে পারেও।

`Optional[Something]` মূলত `Union[Something, None]`-এর একটি শর্টকাট, এবং তারা সমতুল্য।

এর মানে হল, Python 3.10-এ, আপনি টাইপগুলির ইউনিয়ন ঘোষণা করতে `Something | None` ব্যবহার করতে পারেন:

//// tab | Python 3.10+

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * The {@code Immutable} annotation indicates that the object is immutable, i.e.
 * none of its field can be changed.  This also ensures that the type is
 * {@link ThreadSafe}.
 *
 * @see ThreadSafe
 * @since 4.0.0
 */
@Experimental
@Documented
@Retention(RetentionPolicy.CLASS)
@ThreadSafe

        String result = crawlJob.execute();

        assertNotNull(result);
        assertTrue(result.contains("Web  Config Id: web1"));
        assertTrue(result.contains("File Config Id: NONE"));
        assertTrue(result.contains("Data Config Id: data1"));
    }

    // Test getRunningJobCount method
    public void test_getRunningJobCount() {
        // Skip this test - requires complex DB setup

        super(msg);
        this.rootCause = rootCause;
    }

    /**
     * Returns the root cause of this exception.
     *
     * @return the root cause or null if none was set
     */
    public Throwable getRootCause() {
        return rootCause;
    }

    @Override
    public String toString() {
        if (rootCause != null) {