filename = input("入力ファイルを指定してください: ")
fi = open(filename, mode='r')   
fo = []
n = int(input("1ファイルをあたりの列数を指定してください: "))
 
filedata = fi.readlines()
for line in filedata:
    lst = line.strip("\n").split(",")
    header = lst.pop(0)
    i = 0
    while(i*n < len(lst)):
        if(i >= len(fo)):
            fo.append(open("out%d_"%(i) + filename, mode="w"))
            print("out%d_"%(i) + filename + "を作成しました。")
        fo[i].write(header + "," + ",".join(lst[i*n:i*n+n]) + "\n")
        i += 1
 
fi.close()
for o in fo:
    o.close()
 
print("正常に終了しました")

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