How to use 'merge multiple csv files into one python' in Python

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11def merge(columns, files):
12 #first read all csv files to an 3-dim array raw-csv[file][line][column]
13 raw_csv = []
14 for f in files:
15 csv_arr=[]
16 for line in file(f).readlines():
17 csv_arr.append([elem.strip() for elem in line.split(",")])
18 raw_csv.append(csv_arr)
19
20 #now create new file
21 result = []
22 for bench_index in xrange(len(raw_csv[0])):
23 for f in xrange(len(files)):
24 result.append(", ".join(raw_csv[f][bench_index]))
25 result.extend(["",""])
26
27 return "\n".join(result)
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