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- with open(filename1) as f1, open9filename2) as f2:
- data_1 = list(csv.reader(f1))
- data_2 = list(csv.reader(f2))
- d = {}
- for row in data1:
- d[row[0]] = row
- for row in data2:
- if row[0] in d:
- f1_row = d[row[0]]
- merge_somehow(row, f1_row)
- else:
- row[whatever] = "N/A"
- write_data_back_to_file_somehow(data2)
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