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<div class="moz-cite-prefix">On 11-06-15 19:22, Anna Petráová
wrote:<br>
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cite="mid:CAE0EDEqEZxaJh9rzUnrwukePho1EDXsNg0dkzxvD4HcPfiCu=A@mail.gmail.com"
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<div class="gmail_quote">On Thu, Jun 11, 2015 at 12:37 PM,
Moritz Lennert <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:mlennert@club.worldonline.be"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:mlennert@club.worldonline.be">mlennert@club.worldonline.be</a></a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
In a python script I have the following call:<br>
<br>
grass.run_command('r.series',<br>
input = rate_maps,<br>
output = sum_rates,<br>
method = 'sum',<br>
overwrite = True,<br>
quiet=True)<br>
<br>
rate_maps is a list which in one instance contains 8559
map names, leading to an "OSError: [Errno 7] Argument list
too long".<br>
<br>
I know that in the shell I could use xargs to work around
such a problem. But how to do this in python ?<br>
<br>
I could obviously loop through all maps and thus sum them
individually, but this just seems horribly inefficient.<br>
<br>
Does anyone have a better solution ?<br>
<br>
Moritz<br>
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<div>It seems we are hitting these issues quite often, we
should consider add input file as an option like many
temporal modules already have. But splitting as Nikos
suggests has the advantage that you can parallelize the
computation.</div>
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+1 add input file as an option<br>
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<div>Anna</div>
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