{* ../../docs_src/python_types/tutorial009c.py hl[1,4] *}

The parameter `name` is defined as `Optional[str]`, but it is **not optional**, you cannot call the function without the parameter:

```Python
say_hi()  # Oh, no, this throws an error! 😱
```

The `name` parameter is **still required** (not *optional*) because it doesn't have a default value. Still, `name` accepts `None` as the value:

```Python

//
// The passed in handler function must be a method of `adminAPIHandlers` for the
// name displayed in logs and trace to be accurate. The name is extracted via
// reflection.
//
// When no flags are passed, gzip compression, http tracing of headers and
// checking of object layer availability are all enabled. Use flags to modify
// this behavior.
func adminMiddleware(f http.HandlerFunc, flags ...hFlag) http.HandlerFunc {

    assertThrows(IllegalArgumentException.class, () -> sub.put(Range.open(9, 12), 5));

    RangeMap<Integer, Integer> subSub = sub.subRangeMap(Range.closedOpen(5, 5));
    subSub.put(Range.closedOpen(5, 5), 6); // should be a no-op
    assertEquals(
        ImmutableMap.of(
            Range.open(3, 7),
            1,
            Range.closed(7, 9),
            4,
            Range.openClosed(9, 10),
            2,

   * first permutation will be in ascending order, and the last will be in descending order.
   *
   * <p>Elements that compare equal are considered equal and no new permutations are created by
   * swapping them.
   *
   * <p>An empty iterable has only one permutation, which is an empty list.
   *
   * @param elements the original iterable whose elements have to be permuted.

      return null;
    } else {
      K key = keys[entry];
      removeEntryValueHashKnown(entry, valueHash);
      return key;
    }
  }

  /** Removes the entry at the specified index with no additional data. */
  void removeEntry(int entry) {
    removeEntryKeyHashKnown(entry, Hashing.smearedHash(keys[entry]));
  }

  /** Removes the entry at the specified index, given the hash of its key and value. */

            if (childModel.getProjectDirectoryPath() != null) {
                if (parent.getRelativePath() == null || parent.getRelativePath().isEmpty()) {
                    buffer.append(" and 'parent.relativePath' points at no local POM");
                } else {
                    buffer.append(" and 'parent.relativePath' points at wrong local POM");
                }
            }

		b := make([]byte, 128<<10)
		return b
	},
}

// waitForHTTPStream will wait for responses where
// streamHTTPResponse has been used.
// The returned reader contains the payload and must be closed if no error is returned.
func waitForHTTPStream(respBody io.ReadCloser, w io.Writer) error {
	var tmp [1]byte
	// 8K copy buffer, reused for less allocs...
	bufp := poolBuf8k.Get().(*[]byte)
	buf := *bufp

    assertThat(cookie.matches("http://www.example.com".toHttpUrl())).isTrue()
    assertThat(cookie.matches("http://square.com".toHttpUrl())).isFalse()
  }

  /** If no domain is present, match only the origin domain.  */
  @Test fun domainMatchesNoDomain() {
    val cookie = parse(url, "a=b")
    assertThat(cookie!!.matches("http://example.com".toHttpUrl())).isTrue()

		// Get credential information from the request.
		cred, owner, s3Err = getReqAccessKeyV4(r, region, serviceS3)
		if s3Err != ErrNone {
			return cred, owner, s3Err
		}

		// we only support V4 (no presign) with auth body
		s3Err = isReqAuthenticated(ctx, r, region, serviceS3)
	}
	if s3Err != ErrNone {
		return cred, owner, s3Err
	}

	logger.GetReqInfo(ctx).Cred = cred

volume will be bound existingClaim: "" ## minio data Persistent Volume Storage Class ## If defined, storageClassName: <storageClass> ## If set to "-", storageClassName: "", which disables dynamic provisioning ## If undefined (the default) or set to null, no storageClassName spec is ## set, choosing the default provisioner. (gp2 on AWS, standard on ## GKE, AWS & OpenStack) ## ## Storage class of PV to bind. By default it looks for standard storage class. ## If the PV uses a different storage class, specify...