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51
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aaronmk
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#!/usr/bin/env python
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# Inner-joins two map spreadsheets A->B and B->C to A->C
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import csv
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import sys
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def main():
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prog_name = sys.argv[0]
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try: prog_name, map_1_path = sys.argv
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except ValueError:
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raise Exception('Usage: '+prog_name+' map_1 <map_0 >joined_map')
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# Get map 1
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map_1 = {}
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stream = open(map_1_path, 'rb')
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59
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aaronmk
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reader = csv.reader(stream)
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51
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aaronmk
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map_1_in, map_1_out = reader.next()[:2]
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for row in reader:
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if row[1] != '': map_1[row[0]] = row[1]
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stream.close()
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# Join map 1 to map 0
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59
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aaronmk
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reader = csv.reader(sys.stdin)
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51
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aaronmk
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map_0_in, map_0_out = reader.next()[:2]
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assert map_0_out == map_1_in
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59
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aaronmk
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writer = csv.writer(sys.stdout)
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51
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aaronmk
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writer.writerow([map_0_in, map_1_out])
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for row in reader:
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if row[1] in map_1: writer.writerow([row[0], map_1[row[1]]])
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main()
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