Pandas Get a List Of All Data Frames loaded into memory

Question

I am using pandas to read several csv files into memory for processing and at some point would like to list all the data frames I have loaded into memory. Is there a simple

Answer 1

building on previous answers ... this returns a list

import pandas as pd 
%who_ls DataFrame 

however, if you try to run a script it doesn't work

thus

import pandas as pd
sheets=[]    
for var in dir():
    if isinstance(locals()[var], pd.core.frame.DataFrame)  and var[0]!='_':
        sheets.append(var)

since some DataFrames will have a copy for internal use only and those start with '_'