printing values for x,y,and z in columns, python

import xlrd
import os

path = 'data'

with open('', 'w') as f:
    column_values=['', '', '']

    for filename in os.listdir(path):
        fullname = os.path.join(path, filename)
        if fullname.endswith('.xls'):
            wb = xlrd.open_workbook(fullname)
            sh = wb.sheet_by_name(u'')

            for j in range(0,sh.nrows):
                for ind in range(3):
                    column_values[ind] += ((', ' if column_values[ind] else '') +
                                           str(sh.cell(j,ind).value))


    # more reasonable format put lists one per row, x, y and z
    f.write('\n'.join(column_values)+'\n')

this script prints the values in the x values in th开发者_如何学编程e first row, y values in the second row, and the z values in the 3rd row. so how do i make it print he values in the first three columns?

Well, that's very, very basic programming. I would rewrite the script like this:

import xlrd
import os

path = 'E:\\IMRT_C\\Preanalysis\\'

with open('E:\\IMRT_C\\Working_files\\Trying_excel.csv', 'w') as f:
    column_values=[[], [], []]

    for filename in os.listdir(path):
        fullname = os.path.join(path, filename)
        if fullname.endswith('.xls'):
            print('Handling %r' % filename)
            wb = xlrd.open_workbook(fullname)
            sh = wb.sheet_by_name(u'RawTrackingData')

            for j in range(21,sh.nrows):
                for i in range(3):
                    column_values[i] += [str(sh.cell(j, i).value))]

    # more reasonable format put lists one per row, x, y and z
    for i in range(len(column_values[0])):
        for j in range(3):
             f.write(column_values[j][i] + (", " if j < 2 else "\n"))

I haven't tested this, but I hope it works.