[Paraview] Why are multiple csv files written?

[Alex Lindsay]

I am running this simple script:

    from paraview.simple import *

    path = "/home/lindsayad/gdrive/MooseOutput/"
    file_name =
    "DCPlasma_argon_energy_variable_trans_for_compare_townsend_spline_new_form_var_iz_var_el_new_ip_trans_coeffs_small_plasma_radius_gold_out"
    inp = path + file_name + ".e"
    out = path + file_name + ".csv"

    reader = ExodusIIReader(FileName=inp)
    tsteps = reader.TimestepValues
    writer = CreateWriter(out, reader)
    writer.UpdatePipeline(time=tsteps[len(tsteps)-1])

When I run the script, 5 csv files are written, with suffix *0.csv, 
*1.csv, ..., *4.csv. The *0.csv file contains the data I want; however, 
the other 4 files are empty. Why are these 4 empty files written, and 
how can I prevent it from happening?

Alex
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