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A python wrapper to unsio

Project description

ABOUT

UNSIO (Universal Nbody Snapshot Input Output) is an API which perform input/output operations in a generic way, and on different kind of nbody files format (nemo, Gadget binaries 1 and 2, Gadget hdf5, Ramses). By using this API, a user could write only one analysis program which will work on all known files format supported by UNSIO. It's not necessary anymore to know how is implemented a file format, UNSIO will do transparently and automatically all the hard work for you ! With UNSIO, you will spend less time to develop your analysis program. UNSIO comes with an integrated sqlite3 database which can be used to retrieve automatically all your data among terabytes of hard disks.

Features

UNSIO can be used from different languages (C,C++,Fortran and Python)

Supported files format :

Installing python wrapper

pip install python-unsio -U

to get some docstring help

pydoc(unsio.input)
pydoc(unsio.output)

Usage

  • In the example below, we load a RAMSES simulation and we save it in GADGET3 file format
import unsio.input as uns_in  # unsio reading module

myfile="/home/jcl/output_00004" # input RAMSES simulation
# we instantiate a CUNS_IN object
my_in=uns_in.CUNS_IN(myfile,"gas,stars") # We select components GAS and STARS
#
# Reading
#
if my_in.nextFrame(): # load snapshot
  # read stars positions
  status,poss=my_in.getData("stars","pos")
  # read gas positions
  status,posg=my_in.getData("gas","pos")
  # read gas densities
  status,rho=my_in.getData("gas","rho")
  # read time simulation
  status,timex=my_in.getData("time")
#
# Writing
#
import unsio.output as uns_out # unsio writing module

myoutfile="snapshot.g3" # output file name
# we instantiate a CUNS_OUT object
my_out=uns_out.CUNS_OUT(myoutfile,"gadget3") # select gadget3 output format

# prepare data to be saved
# set time
status=my_out.setData(timex,"time")
# set stars positions
status=my_out.setData(poss,"stars","pos")
# set gas positions
status=my_out.setData(posg,"gas","pos")
# set gas densities
status=my_out.setData(rho,"gas","rho")

# write on file system
my_out.save()
# close
my_out.close()

License

UNSIO is open source and released under the terms of the CeCILL2 Licence

Webpage

PLease visit :

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