Add remaining docstrings to complete documentation coverage

Co-authored-by: varun-r-mallya <100590632+varun-r-mallya@users.noreply.github.com>

pythonbpf/helper/bpf_helper_handler.py

@@ -24,6 +24,7 @@ logger: Logger = logging.getLogger(__name__)
 
 
 class BPFHelperID(Enum):
+    """Enumeration of BPF helper function IDs."""
     BPF_MAP_LOOKUP_ELEM = 1
     BPF_MAP_UPDATE_ELEM = 2
     BPF_MAP_DELETE_ELEM = 3
@@ -260,6 +261,11 @@ def bpf_perf_event_output_handler(
     local_sym_tab=None,
     struct_sym_tab=None,
 ):
+    """
+    Emit LLVM IR for bpf_perf_event_output helper function call.
+    
+    This allows sending data to userspace via a perf event array.
+    """
     if len(call.args) != 1:
         raise ValueError(
             f"Perf event output expects exactly one argument, got {len(call.args)}"
@@ -310,6 +316,7 @@ def handle_helper_call(
 
     # Helper function to get map pointer and invoke handler
     def invoke_helper(method_name, map_ptr=None):
+        """Helper function to look up and invoke a registered handler."""
         handler = HelperHandlerRegistry.get_handler(method_name)
         if not handler:
             raise NotImplementedError(

pythonbpf/helper/helper_utils.py

@@ -26,6 +26,7 @@ class HelperHandlerRegistry:
         """Decorator to register a handler function for a helper"""
 
         def decorator(func):
+            """Decorator that registers the handler function."""
             cls._handlers[helper_name] = func
             return func