fix: Address lint issues in parser implementation

- Fix loop variable usage in detect_and_parse method
- Replace try-except-pass with proper exception handling
- Clean up docstring formatting to remove whitespace on blank lines

Co-Authored-By: João <joao@crewai.com>

src/crewai/agents/parser.py

@@ -5,27 +5,25 @@ different formats (ReAct, OpenAI Harmony, etc.), converting them into structured
 AgentAction or AgentFinish objects with automatic format detection.
 """
 
+import re
 from abc import ABC, abstractmethod
 from dataclasses import dataclass
-from typing import Dict, Union
-import re
-import json
 
 from json_repair import repair_json
 
 from crewai.agents.constants import (
+    ACTION_INPUT_ONLY_REGEX,
     ACTION_INPUT_REGEX,
     ACTION_REGEX,
-    ACTION_INPUT_ONLY_REGEX,
     FINAL_ANSWER_ACTION,
-    MISSING_ACTION_AFTER_THOUGHT_ERROR_MESSAGE,
-    MISSING_ACTION_INPUT_AFTER_ACTION_ERROR_MESSAGE,
-    UNABLE_TO_REPAIR_JSON_RESULTS,
-    HARMONY_START_PATTERN,
     HARMONY_ANALYSIS_CHANNEL,
     HARMONY_COMMENTARY_CHANNEL,
     HARMONY_FINAL_ANSWER_ERROR_MESSAGE,
     HARMONY_MISSING_CONTENT_ERROR_MESSAGE,
+    HARMONY_START_PATTERN,
+    MISSING_ACTION_AFTER_THOUGHT_ERROR_MESSAGE,
+    MISSING_ACTION_INPUT_AFTER_ACTION_ERROR_MESSAGE,
+    UNABLE_TO_REPAIR_JSON_RESULTS,
 )
 from crewai.utilities import I18N
 
@@ -75,27 +73,25 @@ class BaseOutputParser(ABC):
     @abstractmethod
     def can_parse(self, text: str) -> bool:
         """Check if this parser can handle the given text format."""
-        pass
 
     @abstractmethod
-    def parse_text(self, text: str) -> Union[AgentAction, AgentFinish]:
+    def parse_text(self, text: str) -> AgentAction | AgentFinish:
         """Parse the text into AgentAction or AgentFinish."""
-        pass
 
 
 class OutputFormatRegistry:
     """Registry for managing different output format parsers."""
 
     def __init__(self):
-        self._parsers: Dict[str, BaseOutputParser] = {}
+        self._parsers: dict[str, BaseOutputParser] = {}
 
     def register(self, name: str, parser: BaseOutputParser) -> None:
         """Register a parser for a specific format."""
         self._parsers[name] = parser
 
-    def detect_and_parse(self, text: str) -> Union[AgentAction, AgentFinish]:
+    def detect_and_parse(self, text: str) -> AgentAction | AgentFinish:
         """Automatically detect format and parse with appropriate parser."""
-        for name, parser in self._parsers.items():
+        for parser in self._parsers.values():
             if parser.can_parse(text):
                 return parser.parse_text(text)
 
@@ -113,7 +109,7 @@ class ReActParser(BaseOutputParser):
             ACTION_REGEX.search(text) is not None
         )
 
-    def parse_text(self, text: str) -> Union[AgentAction, AgentFinish]:
+    def parse_text(self, text: str) -> AgentAction | AgentFinish:
         """Parse ReAct format text."""
         thought = _extract_thought(text)
         includes_answer = FINAL_ANSWER_ACTION in text
@@ -127,7 +123,7 @@ class ReActParser(BaseOutputParser):
                     final_answer = final_answer[:-3].rstrip()
             return AgentFinish(thought=thought, output=final_answer, text=text)
 
-        elif action_match:
+        if action_match:
             action = action_match.group(1)
             clean_action = _clean_action(action)
 
@@ -144,11 +140,10 @@ class ReActParser(BaseOutputParser):
             raise OutputParserException(
                 f"{MISSING_ACTION_AFTER_THOUGHT_ERROR_MESSAGE}\n{_I18N.slice('final_answer_format')}",
             )
-        elif not ACTION_INPUT_ONLY_REGEX.search(text):
+        if not ACTION_INPUT_ONLY_REGEX.search(text):
             raise OutputParserException(
                 MISSING_ACTION_INPUT_AFTER_ACTION_ERROR_MESSAGE,
             )
-        else:
         err_format = _I18N.slice("format_without_tools")
         error = f"{err_format}"
         raise OutputParserException(error)
@@ -161,7 +156,7 @@ class HarmonyParser(BaseOutputParser):
         """Check if text follows OpenAI Harmony format."""
         return HARMONY_START_PATTERN.search(text) is not None
 
-    def parse_text(self, text: str) -> Union[AgentAction, AgentFinish]:
+    def parse_text(self, text: str) -> AgentAction | AgentFinish:
         """Parse OpenAI Harmony format text."""
         matches = HARMONY_START_PATTERN.findall(text)
 
@@ -178,7 +173,7 @@ class HarmonyParser(BaseOutputParser):
                 text=text
             )
 
-        elif channel == HARMONY_COMMENTARY_CHANNEL and tool_name:
+        if channel == HARMONY_COMMENTARY_CHANNEL and tool_name:
             thought_content = content
             tool_input = content
 
@@ -189,8 +184,8 @@ class HarmonyParser(BaseOutputParser):
                     thought_content = content[:json_match.start()].strip()
                     if not thought_content:
                         thought_content = f"Using tool {tool_name}"
-            except:
-                pass
+            except Exception:
+                tool_input = content
 
             safe_tool_input = _safe_repair_json(tool_input)
 
@@ -201,7 +196,6 @@ class HarmonyParser(BaseOutputParser):
                 text=text
             )
 
-        else:
         raise OutputParserException(HARMONY_FINAL_ANSWER_ERROR_MESSAGE)
 
 
@@ -261,8 +255,7 @@ def _extract_thought(text: str) -> str:
         return ""
     thought = text[:thought_index].strip()
     # Remove any triple backticks from the thought string
-    thought = thought.replace("```", "").strip()
-    return thought
+    return thought.replace("```", "").strip()
 
 
 def _clean_action(text: str) -> str: