duplicated securities in accounts not being handled as expected

[sandsmichael]

Hello, great work on the project I like the idea.

assertion fails with duplicated securities in index:
assert(np.round(port.final_allocation.sum(),4)==1.0)
I am intentionally including a duplicated ticker across multiple portfolios but don't seem to be getting desired behaviour with "Correcting distribution for single-security accounts edge case" I see we use
acctsdf = port.groupby(['accountid','accounttype']).new_value_chg_n.sum()
to determine total value allocated to an individual security but I am unsure if there is more effective way?

       port.loc[index,'new_shares_n'] = port.new_shares_n - port.final_shares_chg_n
       port.loc[index,'new_value_n'] = port.new_value_n - port.new_value_chg_n
       port.loc[index,'final_shares_chg_n'] = 0
       port.loc[index,'new_value_chg_n'] = 0

       #remove from denominator
       port.loc[port.ticker == t,'value'] = port.loc[port.ticker == t,'value'] - port[index].value_orig.sum()

Thanks