Move PythonRepl -> langchain.utilities (#2917)

langchain/python.py

@@ -1,26 +1,4 @@
-"""Mock Python REPL."""
-import sys
-from io import StringIO
-from typing import Dict, Optional
+"""For backwards compatibility."""
+from langchain.utilities.python import PythonREPL
 
-from pydantic import BaseModel, Field
-
-
-class PythonREPL(BaseModel):
-    """Simulates a standalone Python REPL."""
-
-    globals: Optional[Dict] = Field(default_factory=dict, alias="_globals")
-    locals: Optional[Dict] = Field(default_factory=dict, alias="_locals")
-
-    def run(self, command: str) -> str:
-        """Run command with own globals/locals and returns anything printed."""
-        old_stdout = sys.stdout
-        sys.stdout = mystdout = StringIO()
-        try:
-            exec(command, self.globals, self.locals)
-            sys.stdout = old_stdout
-            output = mystdout.getvalue()
-        except Exception as e:
-            sys.stdout = old_stdout
-            output = str(e)
-        return output
+__all__ = ["PythonREPL"]