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import re
file_a = open('a.txt')
pattern = re.compile('a=(\d+),(\w+)')
dict_1 = {}
for line in file_a:
s = pattern.match(line).group(1)
dict_1[int(s)] = line
list_1 = dict_1.keys()
list_1.sort()
for i in list_1:
print dict_1[i]