Get a running total from a list

Question

I\'m reading in items:

for line in sys.stdin:
    line = line.strip()
    data = line.split(\"-\")

If I print data as it is read,

Answer 1

Pandas does a very good job in handling this kind of situations

import pandas as pd
df_data=pd.read_csv(filepath_or_buffer=path,sep='_',names =['Name','value'])
df=df_data.groupby(['Name'])['value'].sum()

print df

output

'Adam'     13
'Lucy'      2
'Peter'    11

Input file

Adam_5
Peter_7
Adam_8
Lucy_2
Peter_4