code: def pre_run_cell(self, cellno, code):
          
          #First, we look for loops and list/dict comprehensions in the code. Find
          #the id of the latest cell that was executed.
          self.cellid = cellno
          
          #If there is a loop somewhere in the code, it could generate millions of
          #database entries and make the notebook unusable.
          import ast
          if findloop(ast.parse(code)):
              #Disable the acorn logging systems so that we don't pollute the
              #database.
              from acorn.logging.decoration import set_streamlining
              set_streamlining(True)
  
              #Create the pre-execute entry for the database.
              from time import time
              self.pre = {
                  "m": "loop",
                  "a": None,
                  "s": time(),
                  "r": None,
                  "c": code,
              }
docs: Executes before the user-entered code in `ipython` is run. This
          intercepts loops and other problematic code that would produce lots of
          database entries and streamlines it to produce only a single entry.
  
          Args:
              cellno (int): the cell number that is about to be executed.
              code (str): python source code that is about to be executed.