explain Python black magic

minestarks · minestarks · commit 0eb53b4a39b8 · 2026-01-16T13:29:00.000-08:00
diff --git a/source/pip/qsharp/telemetry.py b/source/pip/qsharp/telemetry.py
@@ -49,6 +49,9 @@
     (os.environ.get("QDK_PYTHON_TELEMETRY") or "").lower(),
 }
 
+# `&` here is set intersection: it yields the common values between sets.
+# `not _env_values & _disable_values` is True iff no disable value is present.
+# `bool(_env_values & _enable_values)` is True iff any enable value is present.
 TELEMETRY_ENABLED = not _env_values & _disable_values and (
     bool(_env_values & _enable_values) or "dev" not in QSHARP_VERSION
 )

Original file line number	Diff line number	Diff line change
`@@ -49,6 +49,9 @@`
`49`	`49`	`(os.environ.get("QDK_PYTHON_TELEMETRY") or "").lower(),`
`50`	`50`	`}`
`51`	`51`
	`52`	+# `&` here is set intersection: it yields the common values between sets.
	`53`	+# `not _env_values & _disable_values` is True iff no disable value is present.
	`54`	+# `bool(_env_values & _enable_values)` is True iff any enable value is present.
`52`	`55`	`TELEMETRY_ENABLED = not _env_values & _disable_values and (`
`53`	`56`	`bool(_env_values & _enable_values) or "dev" not in QSHARP_VERSION`
`54`	`57`	`)`