Fix ruff errors (#8936)

* Fix ruff errors

Renamed neural_network/input_data.py to neural_network/input_data.py_tf
because it should be left out of the directory for the following
reasons:

1. Its sole purpose is to be used by neural_network/gan.py_tf, which is
   itself left out of the directory because of issues with TensorFlow.

2. It was taken directly from TensorFlow's codebase and is actually
   already deprecated. If/when neural_network/gan.py_tf is eventually
   re-added back to the directory, its implementation should be changed
   to not use neural_network/input_data.py anyway.

* updating DIRECTORY.md

* Change input_data.py_tf file extension

Change input_data.py_tf file extension because algorithms-keeper bot is being picky about it

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Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

web_programming/covid_stats_via_xpath.py

@@ -4,17 +4,21 @@ This is to show simple COVID19 info fetching from worldometers site using lxml
 more convenient to use in Python web projects (e.g. Django or Flask-based)
 """
 
-from collections import namedtuple
+from typing import NamedTuple
 
 import requests
 from lxml import html  # type: ignore
 
-covid_data = namedtuple("covid_data", "cases deaths recovered")
+
+class CovidData(NamedTuple):
+    cases: int
+    deaths: int
+    recovered: int
 
 
-def covid_stats(url: str = "https://www.worldometers.info/coronavirus/") -> covid_data:
+def covid_stats(url: str = "https://www.worldometers.info/coronavirus/") -> CovidData:
     xpath_str = '//div[@class = "maincounter-number"]/span/text()'
-    return covid_data(*html.fromstring(requests.get(url).content).xpath(xpath_str))
+    return CovidData(*html.fromstring(requests.get(url).content).xpath(xpath_str))
 
 
 fmt = """Total COVID-19 cases in the world: {}