[Python] Improved code snippet for error_sampler (#11314)

---------

Co-authored-by: vivianyentran <[email protected]>

docs/platforms/python/configuration/sampling.mdx

@@ -14,17 +14,13 @@ To send a representative sample of your errors to Sentry, set the <PlatformIdent
 
 The error sample rate defaults to `1.0`, meaning all errors are sent to Sentry.
 
-<Note>
-
-Changing the error sample rate requires re-deployment. In addition, setting an SDK sample rate limits visibility into the source of events. Setting a rate limit for your project (which only drops events when volume is high) may better suit your needs.
-
-</Note>
+Changing the error sample rate requires re-deployment. In addition, setting an SDK sample rate limits visibility into the source of events. Setting a [rate limit](/pricing/quotas/manage-event-stream-guide/#rate-limiting) for your project (which only drops events when volume is high) may better suit your needs.
 
 ### Dynamically Sampling Error Events
 
-To sample error events dynamically, set the <PlatformIdentifier name="error-sampler" /> to a function that returns the desired sample rate for the event. The <PlatformIdentifier name="error-sampler" /> takes two arguments, <PlatformIdentifier name="event" /> and <PlatformIdentifier name="hint" />, which it uses to inform the sampling decision.
+To sample error events dynamically, set the <PlatformIdentifier name="error-sampler" /> to a function that returns the desired sample rate for the event. The <PlatformIdentifier name="error-sampler" /> takes two arguments, <PlatformIdentifier name="event" /> and <PlatformIdentifier name="hint" />. `event` is the [Event](https://github.com/getsentry/sentry-python/blob/master/sentry_sdk/_types.py) that will be sent to Sentry, `hint` includes Python's [sys.exc_info()](https://docs.python.org/3/library/sys.html#sys.exc_info) information in `hint["exc_info"]`.
 
-<Alert level="warning">
+<Alert>
 
 Your <PlatformIdentifier name="error-sampler" /> function **must return a valid value**. A valid value is either:
 

platform-includes/configuration/error-sampler/python.mdx

@@ -1,20 +1,23 @@
 ```python
 import sentry_sdk
+from sentry_sdk.types import Event, Hint
 
-def my_sampler(_, hint):
-    exception_sampler_values = {
-        MyException: 0.5,
-        MyIgnoredException: 0.0,  # or equivalently, False
-    }
 
-    try:
-        return exception_sampler_values[hint["exc_info"][0]]
-    except (IndexError, KeyError, TypeError):
-        return 1.0  # or equivalently, True
+def my_error_sampler(event: Event, hint: Hint) -> float:
+    error_class = hint["exc_info"][0]
+
+    if error_class == MyException:
+        return 0.5
+    elif error_class == MyIgnoredException:
+        return 0
+
+    # All the other errors
+    return 1.0
+
 
 sentry_sdk.init(
     # ...
 
-    error_sampler=my_sampler,
+    error_sampler=my_error_sampler,
 )
 ```