Small improvements to traces_sampler configuration. (#13470)

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## DESCRIBE YOUR PR
A small change to make the documentation for `traces_sampler` a bit
better.

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---------

Co-authored-by: Shannon Anahata <[email protected]>

Author: antonpirker

docs/platforms/python/configuration/options.mdx

@@ -246,6 +246,8 @@ The callback typically gets a second argument (called a "hint") which contains t
 
 </SdkOption>
 
+<PlatformContent includePath="/performance/traces-sampler-config-option" />
+
 ## Transport Options
 
 Transports are used to send events to Sentry. Transports can be customized to some degree to better support highly specific deployments.
@@ -331,11 +333,7 @@ If you want to disable all tracing you need to set `traces_sample_rate=None`. In
 
 </SdkOption>
 
-<SdkOption name="traces_sampler" type='function' defaultValue='None'>
-
-A function responsible for determining the percentage chance a given transaction will be sent to Sentry. It will automatically be passed information about the transaction and the context in which it's being created, and must return a number between `0` (0% chance of being sent) and `1` (100% chance of being sent). Can also be used for filtering transactions, by returning `0` for those that are unwanted. Either this or `traces_sample_rate` must be defined to enable tracing.
-
-</SdkOption>
+<PlatformContent includePath="/performance/traces-sampler-config-option" />
 
 <SdkOption name="trace_propagation_targets" type='list' defaultValue="['.*']">
 

platform-includes/performance/sampling-function-intro/python.mdx

@@ -1,4 +1,4 @@
-To use the sampling function, set the <PlatformIdentifier name="traces-sampler" /> option in your `sentry-sdk.init()` to a function that will accept a <PlatformIdentifier name="sampling-context" /> dictionary and return a sample rate between 0 and 1. For example:
+To use the sampling function, set the <PlatformIdentifier name="traces-sampler" /> option in your `sentry-sdk.init()` to a function that will accept a <PlatformIdentifier name="sampling-context" /> dictionary and return a sample rate between `0` and `1`. For example:
 
 <PlatformContent includePath="performance/traces-sampler-as-sampler" />
 

platform-includes/performance/traces-sampler-as-filter/python.mdx

@@ -3,12 +3,14 @@ import sentry_sdk
 from sentry_sdk.types import SamplingContext
 
 def traces_sampler(sampling_context: SamplingContext) -> float:
+    # Examine provided sampling context along with anything in the
+    # global namespace to compute the sample rate for this transaction
     if "...":
         # Drop this transaction, by setting its sample rate to 0%
         return 0
-    else:
-        # Default sample rate for all others (replaces traces_sample_rate)
-        return 0.1
+
+    # Default sample rate for all others (replaces traces_sample_rate)
+    return 0.1
 
 sentry_sdk.init(
     # ...

platform-includes/performance/traces-sampler-as-sampler/python.mdx

@@ -3,29 +3,27 @@ import sentry_sdk
 from sentry_sdk.types import SamplingContext
 
 def traces_sampler(sampling_context: SamplingContext) -> float:
-    # Examine provided context data (including parent decision, if any)
-    # along with anything in the global namespace to compute the sample rate
-    # or sampling decision for this transaction
-
     # Use the parent sampling decision if we have an incoming trace.
     # Note: we strongly recommend respecting the parent sampling decision,
     # as this ensures your traces will be complete!
     parent_sampling_decision = sampling_context.get("parent_sampled")
     if parent_sampling_decision is not None:
         return float(parent_sampling_decision)
 
+    # Examine provided sampling context along with anything in the
+    # global namespace to compute the sample rate for this transaction
     if "...":
         # These are important - take a big sample
         return 0.5
     elif "...":
-        # These are less important or happen much more frequently - only take 1%
+        # These are less important - only take 1%
         return 0.01
     elif "...":
-        # These aren't something worth tracking - drop all transactions like this
+        # These aren't worth tracking - drop these transactions
         return 0
-    else:
-        # Default sample rate
-        return 0.1
+
+    # Default sample rate
+    return 0.1
 
 sentry_sdk.init(
     # ...

platform-includes/performance/traces-sampler-config-option/python.mdx

@@ -0,0 +1,5 @@
+<SdkOption name="traces_sampler" type='function' defaultValue='None'>
+
+A function responsible for determining the percentage chance a given transaction will be sent to Sentry. It will automatically be passed information about the transaction and the context in which it's being created, and must return a number between `0` (0% chance of being sent) and `1` (100% chance of being sent). Can also be used for filtering transactions, by returning `0` for those that are unwanted. Either this or `traces_sample_rate` must be defined to enable tracing.
+
+</SdkOption>