code: def python_to_mongo(self, filterstr):
      try:
          tree = ast.parse(self._convert(filterstr), mode="eval")
      except SyntaxError as e:
          raise ValueError(
              "Invalid python comparison expression; form something like `my_col == 123`"
          ) from e
  
      multiple_filters = hasattr(tree.body, "op")
  
      if multiple_filters:
          op = self.AST_OPERATORS.get(type(tree.body.op))
          values = [self._handle_compare(v) for v in tree.body.values]
      else:
          op = "$and"
          values = [self._handle_compare(tree.body)]
      return {"$or": [{op: values}]}
  
imports: import ast
  import json
  import sys
  import urllib
  from wandb_gql import gql
  import wandb
  from wandb.apis import public
  from wandb.apis.attrs import Attrs
  from wandb.apis.paginator import Paginator
  from wandb.sdk.lib import ipython
label_desc: Use image node_id 8 for calling the PythonMongoishQueryGenerator obj's underlying member method code with example usage: obj.python_to_mongo(filterstr) and returns: dict