[Answer]-Closing a Django FieldFile

It seems that I should not rely on the FieldFile’s implicit call to open(). The file will automatically open itself the first time, but not after you close it.

Adding explicit calls to open() makes it work.

    p2.data_file.open('rU')
    with p2.data_file:
        for line in p2.data_file:
            print '1: ' + line

    p2.data_file.open('rU')
    with p2.data_file:
        for line in p2.data_file:
            print '2: ' + line