dstandish opened a new pull request, #28182:
URL: https://github.com/apache/airflow/pull/28182
Old error was a bit silly, printing out the repr of the set.
```
Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/airflow/stats.py", line 232,
in wrapper
stat = handler_stat_name_func(stat)
File "/usr/local/lib/python3.9/site-packages/airflow/stats.py", line 201,
in stat_name_default_handler
raise InvalidStatsNameException(
airflow.exceptions.InvalidStatsNameException: The stat name
(dag_processing.last_duration.intldldat-k1wm-full-dev-k1-local-tables-wfoptimizedlayer
- Copy) has to be composed with characters in
{'j', 'Q', 'G', 'v', 'l', 'y', '4', 'N', 'f', 'U', 'F', 'P', 'w', 'V', '.',
'-', 't', 'T', 'p', '1', 'D', 'd', 'I', 'C', 'k', 'A', 'a', 'q', 'c', 'i', 'o',
'e', 'u', 'X', 'O', '0', 'g', '6', '5', 's', 'Y', 'n', 'E', 'H', 'Z', 'L', 'h',
'b', 'z', '3', 'x', 'B', 'K', 'S', 'W', '2', '_', 'r', 'm', 'J', '9', '7', 'R',
'8', 'M'}.
```
Using regex is more compact.
```
Traceback (most recent call last):
File
"/usr/local/opt/[email protected]/Frameworks/Python.framework/Versions/3.8/lib/python3.8/code.py",
line 90, in runcode
exec(code, self.locals)
File "<input>", line 1, in <module>
File "/Users/dstandish/code/airflow/airflow/stats.py", line 196, in
stat_name_default_handler
raise InvalidStatsNameException(f"The stat name ({stat_name}) must match
regex {pattern}.")
airflow.exceptions.InvalidStatsNameException: The stat name (abc abc) must
match regex ^[A-Za-z0-9_.-]+$.
```
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