renumbering chapters >= 19

21-async/domains/README.rst

@@ -0,0 +1,28 @@
+domainlib demonstration
+=======================
+
+Run Python's async console (requires Python ≥ 3.8)::
+
+    $ python3 -m asyncio
+
+I'll see ``asyncio`` imported automatically::
+
+    >>> import asyncio
+
+Now you can experiment with ``domainlib``.
+
+At the `>>>` prompt, type these commands::
+
+    >>> from domainlib import *
+    >>> await probe('python.org')
+
+Note the result.
+
+Next::
+
+    >>> names = 'python.org rust-lang.org golang.org n05uch1an9.org'.split()
+    >>> async for result in multi_probe(names):
+    ...     print(*result, sep='\t')
+
+Note that if you run the last two lines again,
+the results are likely to appear in a different order.