inshu chauhan wrote: > 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 ???
next() raises StopIteration when there is nothing else to return. py> it = iter([1, 2, 3]) py> it.next() 1 py> it.next() 2 py> it.next() 3 py> it.next() Traceback (most recent call last): File "<stdin>", line 1, in <module> StopIteration You have reached the end of the file and there is nothing else for the CSV reader to return, so it raises StopIteration. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
