python 处理arcgis gdb文

import arcpy
from arcpy import env
import os
import types
fc = 'D:/demo.gdb/test'  # file location .
fields = ["Id", "name", "descr"] # you table columuns .
print '+++++++++++++++++++++++++++++'
with arcpy.da.SearchCursor(fc, fields) as cursor:
 f = file('D:/demo.txt', 'w') # open for 'w'riting
 for row in cursor:
     str = "{0}, {1}, {2}".format(row[0], row[1], row[2])
     #print("{0}, {1}, {2}".format(row[0], row[1], row[2]))
     print 'The contents is :',str 
     f.write(str) # write text to file
     f.write('\n');
 # close the file   
 f.close() 
 
 
#print out the content of this text.
f = file('D:/demo.txt')
# if no mode is specified, 'r'ead mode is assumed by default
while True:
    line = f.readline()
    if len(line) == 0: # Zero length indicates EOF
        break
    print line,
    # Notice comma to avoid automatic newline added by Python
f.close() # close the file