renamed 22-async/

22-async/domains/curio/blogdom.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+from curio import run, TaskGroup
+from curio.socket import getaddrinfo, gaierror
+from keyword import kwlist
+
+MAX_KEYWORD_LEN = 4  # <1>
+
+
+async def probe(domain: str) -> tuple[str, bool]:  # <2>
+    try:
+        await getaddrinfo(domain, None)  # <4>
+    except gaierror:
+        return (domain, False)
+    return (domain, True)
+
+
+async def main() -> None:  # <5>
+    names = (kw for kw in kwlist if len(kw) <= MAX_KEYWORD_LEN)  # <6>
+    domains = (f'{name}.dev'.lower() for name in names)  # <7>
+    async with TaskGroup() as group:
+        for domain in domains:
+            await group.spawn(probe, domain)
+        async for task in group:  # <9>
+            domain, found = task.result  # <10>
+            mark = '+' if found else ' '
+            print(f'{mark} {domain}')
+
+
+if __name__ == '__main__':
+    run(main())  # <11>