cat employee.txt:   

    100 Jason Smith   

    200 John Doe   

    300 Sanjay Gupta   

    400 Ashok Sharma

    cat bonus.txt:   

    100 $5,000   

    200 $500   

    300 $3,000   

    400 $1,250

    400 ashok sharma $1,250   

    100 jason smith  $5,000   

    200 john doe  $500   

    300 sanjay gupta  $3,000

#! /usr/bin/env python
#coding=utf-8
fp01 = open("bonus.txt", "r")
a = []
for line01 in fp01:
    a.append(line01)

fp02 = open("employee.txt", "r")

fc02 = sorted(fp02, key = lambda x:x.split()[1])

for line02 in fc02:
    i = 0
    while line02.split()[0]!=a[i].split()[0]:
        i += 1
    print "%s %s %s %s" % (line02.split()[0], line02.split()[1], line02.split()[2], a[i].split()[1])

fp01.close()
fp02.close()