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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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67
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aaronmk
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try: _prog_name, map_1_path = sys.argv
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51
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aaronmk
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except ValueError:
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180
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aaronmk
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raise SystemExit('Usage: '+sys.argv[0]+' <map_0 map_1 [| '+sys.argv[0]
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+' map_2]... >joined_map')
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51
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aaronmk
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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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730
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aaronmk
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if row[0] != '': map_1[row[0]] = row[1]
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51
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aaronmk
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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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120
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aaronmk
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writer = csv.writer(sys.stdout)
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cols = reader.next()
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aaronmk
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if not cols[1] == map_1_in: raise SystemExit('Map error: '
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aaronmk
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'Map 0 output column name doesn\'t match map 1 input column name')
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120
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aaronmk
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cols[1] = map_1_out
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writer.writerow(cols)
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51
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aaronmk
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for row in reader:
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730
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aaronmk
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if row[1] != '':
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try: row[1] = map_1[row[1]]
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except KeyError:
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row[2] = '** No join mapping for '+row[1]+' ** '+row[2]
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row[1] = ''
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120
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aaronmk
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writer.writerow(row)
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51
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aaronmk
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main()
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