python pands实现execl转csv 并修改csv指定列

# -*- coding: utf-8 -*-
import os 
import pandas as pd
import numpy as np
#from os import sys

def appendStr(strs):
    return "BOQ" + strs

def addBOQ(dirs, csv_file):
    data = pd.read_csv(os.path.join(dirs, csv_file), encoding="gbk")
    data = data[data[u"BOQ条码"] != 'None']
    data[u"BOQ条码"] = data[u"BOQ条码"].astype(np.str)
    data[u"BOQ条码"] = data[u"BOQ条码"].apply(appendStr, 1)
    data.to_csv(os.path.join(dirs, csv_file), index=False, encoding="gbk")

def execl2csvbypandas(dirs, excel_file, addStr):
    newdir = os.path.join(dirs, "csvdir")
    if not os.path.isdir(newdir):
        os.makedirs(newdir)
    filename = os.path.splitext(excel_file)
    data_xls = pd.read_excel(os.path.join(dirs, excel_file), 'Sheet1', index_col=0)
    csvname = os.path.join(newdir, filename[0].join(['sheet1', '.csv']))
    data_xls.to_csv(csvname, encoding='gbk')
    if True == addStr:
        addBOQ(newdir, csvname)

def procExeclFiles(arg, dirs, files):
    print  arg
    for f in files:
        file_path = os.path.join(dirs, f)
        if os.path.isfile(file_path):
            print f
            execl2csvbypandas(dirs, f, arg)
    print "end...."

  
if __name__ == "__main__":
    #遍历目录，并把改目录下的execl转为csv,然后存入该目录下csvdir目录下,传参数True时，是给csv中BOQ条码列添加BOQ字符串，一般为False
    os.path.walk(r"C:\Users\Desktop\test", procExeclFiles, (True))