python print 追加写入文件中

f=open('test.txt','a+w')
s= '123'
abc= '456'
print >> f, s,abc
f.close()

或者

f=open('output.csv','a+w')

print >>f,  tmptracid +","+ tpye +","+model+ "," + summary + "," + author 
f.close()

r 读

w 写

a 追加

上面参数可以选择