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Date: Mon, 11 Feb 2013 12:00:12 +0100
Subject: Error in reading and writing CSV format file in python
From: inshu chauhan <insideshoes@gmail.com>
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In the programme below I am trying to read two csv format files and process
them and write a new file with some of theirs data.

import csv
f1_reader = csv.reader(open(r"Z:\Weka
work\Feature_Vectors_Fullset_00.arff"))
f2_reader = csv.reader(open(r"Z:\Weka
work\Feature_Vectors_Fullset_00_noxy+class.arff"))
nf = open(r"Z:\Weka work\classified_image00_withoutxy.arff", "w")

while True:
    l1 = f1_reader.next()
    while len(l1) != 12:
        l1 = f1_reader.next()
    l2 = f2_reader.next()
    while len(l2) != 11:
        l2 = f2_reader.next()

    ix = l1[0].strip()
    iy = l1[1].strip()
    classification = l2[8].strip()

    print >> nf, ix, iy, classification

nf.close()

This programme is giving me this error now :

Traceback (most recent call last):
  File "Z:\Weka work\final_image_classificationwithoutxy.py", line 16, in
<module>
    l2 = f2_reader.next()
StopIteration


what could be a possible reason to StopIteration ???


I checked the syntax and usage of this module looks alright to me , but
then why this error ?


Thankyou in Advance

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<div dir=3D"ltr"><div><div><div><div>In the programme below I am trying to =
read two csv format files and process them and write a new file with some o=
f theirs data.<br><br>import csv<br>f1_reader =3D csv.reader(open(r&quot;Z:=
\Weka work\Feature_Vectors_Fullset_00.arff&quot;))<br>
f2_reader =3D csv.reader(open(r&quot;Z:\Weka work\Feature_Vectors_Fullset_0=
0_noxy+class.arff&quot;))<br>nf =3D open(r&quot;Z:\Weka work\classified_ima=
ge00_withoutxy.arff&quot;, &quot;w&quot;)<br><br>while True:<br>=A0=A0=A0 l=
1 =3D f1_reader.next()<br>
=A0=A0=A0 while len(l1) !=3D 12:<br>=A0=A0=A0=A0=A0=A0=A0 l1 =3D f1_reader.=
next()<br>=A0=A0=A0 l2 =3D f2_reader.next()<br>=A0=A0=A0 while len(l2) !=3D=
 11:<br>=A0=A0=A0=A0=A0=A0=A0 l2 =3D f2_reader.next()<br><br>=A0=A0=A0 ix =
=3D l1[0].strip()<br>=A0=A0=A0 iy =3D l1[1].strip()<br>=A0=A0=A0 classifica=
tion =3D l2[8].strip()<br>
<br>=A0=A0=A0 print &gt;&gt; nf, ix, iy, classification<br><br>nf.close()<b=
r><br></div>This programme is giving me this error now : <br><br>Traceback =
(most recent call last):<br>=A0 File &quot;Z:\Weka work\final_image_classif=
icationwithoutxy.py&quot;, line 16, in &lt;module&gt;<br>
=A0=A0=A0 l2 =3D f2_reader.next()<br>StopIteration<br><br><br></div>what co=
uld be a possible reason to StopIteration ??? <br><br><br></div>I checked t=
he syntax and usage of this module looks alright to me , but then why this =
error ?<br>
<br><br></div>Thankyou in Advance <br></div>

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