python で csv を読む

標準関数で読むとき

#! /usr/bin/env python
# -*- coding:utf-8 -*-

import csv
import sys

def main():

    fields = ["No","time","clock","imem_addr","asm","dmem_addr","data"]
    data = csv.DictReader(open(sys.argv[1],"r"),skipinitialspace=True,
                          fieldnames=fields)

    for row in data:
        for key in fields:
            print key,":",row[key]

if __name__ == "__main__":
    main()

pandas で読むとき

先頭の無効データを読み飛ばすときは、skiprows を使う

import pandas as pd

def main():

    pdd = pd.read_csv(sys.argv[1],names=fields,skiprows=5)
    print pdd