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Added tons of doc

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Guilhem Lavaux 2014-12-07 21:50:12 +01:00
parent e5fbc1d62e
commit e6068c0aa0
3 changed files with 263 additions and 102 deletions
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36
doc/source/pythonmodule.rst
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@ -1,6 +1,38 @@
The CosmoToolbox python module
==============================
.. automodule:: cosmotool
:members: loadRamses, loadRamsesAll
.. module:: cosmotool
Simulation handling
^^^^^^^^^^^^^^^^^^^
The simulation data
-------------------
.. autoclass:: PySimulationBase
:members:
.. autoclass:: SimulationBare
:members:
.. autoclass:: Simulation
:members:
.. autoclass:: PySimulationAdaptor
:members:
The simulation loaders
----------------------
.. autofunction:: loadRamses
.. autofunction:: loadRamsesAll
.. autofunction:: loadGadget
.. autofunction:: loadParallelGadget
Timing
------
.. autofunction:: time_block
.. autofunction:: timeit
.. autofunction:: timeit_quiet

166
python/_cosmotool.pyx
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@ -49,37 +49,120 @@ cdef extern from "loadRamses.hpp" namespace "CosmoTool":
class PySimulationBase(object):
"""
This is the base class to representation Simulation in CosmoTool/python.
"""
def getPositions(self):
"""
getPositions(self)
Returns:
A list of three arrays holding the positions of the particles.
The i-th element is the i-th coordinate of each particle.
It may be None if the positions were not requested.
"""
raise NotImplementedError("getPositions is not implemented")
def getVelocities(self):
"""
getVelocities(self)
Returns:
A list of three arrays holding the velocities of the particles.
The i-th element is the i-th coordinate of each particle.
It may be None if the velocities were not requested.
"""
raise NotImplementedError("getVelocities is not implemented")
def getIdentifiers(self):
"""
getIdentifiers(self)
Returns:
Returns an integer array that hold the unique identifiers of
each particle.
It may be None if the identifiers were not requested.
"""
raise NotImplementedError("getIdentifiers is not implemented")
def getTypes(self):
"""
getTypes(self)
Returns:
Returns an integer array that hold the type of
each particle.
It may be None if the types were not requested.
"""
raise NotImplementedError("getTypes is not implemented")
def getOmega_M(self):
"""
getOmega_M(self)
Returns:
the mean matter density in the simulation, with respect
to the critical density.
"""
raise NotImplementedError("getOmega_M is not implemented")
def getOmega_Lambda(self):
"""
getOmega_Lambda(self)
Returns:
the mean dark energy density in the simulation, with respect
to the critical density.
"""
raise NotImplementedError("getOmega_Lambda is not implemented")
def getTime(self):
"""
getTime(self)
Returns:
the time the snapshot was taken in the simulation. It can
have various units depending on the file format.
"""
raise NotImplementedError("getTime is not implemented")
def getHubble(self):
"""
getHubble(self)
Returns:
the hubble constant in unit of 100 km/s/Mpc
"""
raise NotImplementedError("getHubble is not implemented")
def getBoxsize(self):
"""
getBoxsize(self)
Returns:
the size of the simulation box. The length unit is not fixed,
though it is customary to have it in Mpc/h if the loader has
access to the unit normalization.
"""
raise NotImplementedError("getBoxsize is not implemented")
def getMasses(self):
"""
getMasses(self)
Returns:
an array with the masses of each particles, in unspecified unit that
depend on the loader.
"""
raise NotImplementedError("getMasses is not implemented")
cdef class Simulation:
"""
Simulation()
Class that directly manages internal loaded data obtained from a loader
"""
cdef list positions
cdef list velocities
@ -147,8 +230,16 @@ cdef class Simulation:
del self.data
class _PySimulationAdaptor(PySimulationBase):
class PySimulationAdaptor(PySimulationBase):
"""
PySimulationAdaptor(PySimulationBase_)
This class is an adaptor for an internal type to the loader. It defines
all the methods of PySimulationBase.
Attributes:
simu: a Simulation_ object
"""
def __init__(self,sim):
self.simu = sim
@ -189,17 +280,12 @@ cdef class ArrayWrapper:
cdef set_data(self, np.uint64_t size, int type_array, void* data_ptr):
""" Set the data of the array
This cannot be done in the constructor as it must recieve C-level
arguments.
This cannot be done in the constructor as it must recieve C-level
arguments.
Parameters:
-----------
size: int
Length of the array.
data_ptr: void*
Pointer to the data
Args:
size (int): Length of the array.
data_ptr (void*): Pointer to the data
"""
self.data_ptr = data_ptr
self.size = size
@ -275,8 +361,27 @@ cdef object wrap_simudata(SimuData *data, int flags):
return simu
def loadGadget(str filename, int snapshot_id, bool loadPosition = True, bool loadVelocity = False, bool loadId = False, bool loadType = False, bool loadMass=False):
"""loadGadget(filename, cpu_id, loadPosition=True, loadVelocity=False, loadId=False, loadType=False)
It loads a gadget-1 snapshot and return a PySimulationBase object. If cpu_id is negative then the snapshot is considered not to be part of a set of snapshots written by different cpu. Otherwise the filename is modified to reflectt this cpu_id.
"""loadGadget(filename, snapshot_id, loadPosition=True, loadVelocity=False, loadId=False, loadType=False)
This function loads Gadget-1 snapshot format.
If snapshot_id is negative then the snapshot is considered not to be part of
a set of snapshots written by different cpu. Otherwise the filename is modified
to reflect the indicated snapshot_id.
Arguments:
filename (str): input filename
snapshot_id (int): identifier of the gadget file if it is a multi-file snapshot
Keyword arguments:
loadPosition (bool): whether to load positions
loadVelocity (bool): whether to load velocities
loadId (bool): whether to load unique identifiers
loadType (bool): whether to set types to particles
loadMass (bool): whether to set the mass of particles
Returns:
an PySimulationAdaptor instance.
"""
cdef int flags
@ -299,22 +404,23 @@ It loads a gadget-1 snapshot and return a PySimulationBase object. If cpu_id is
if data == <SimuData*>0:
return None
return _PySimulationAdaptor(wrap_simudata(data, flags))
return PySimulationAdaptor(wrap_simudata(data, flags))
def loadParallelGadget(object filename_list, bool loadPosition = True, bool loadVelocity = False, bool loadId = False, bool loadType = False, bool loadMass=False):
"""loadGadget(filename list, loadPosition=True, loadVelocity=False, loadId=False, loadType=False)
"""loadParallelGadget(filename list, loadPosition=True, loadVelocity=False, loadId=False, loadType=False)
Arguments:
- filename list: a list or tuple of filenames to load in parallel
filename (list): a list or tuple of filenames to load in parallel
Keywords:
- loadPosition: indicate to load positions
- loadVelocity: indicate to load velocities
- loadId: indicate to load id
- loadType: indicate to load particle types
Keyword arguments:
loadPosition (bool): indicate to load positions
loadVelocity (bool): indicate to load velocities
loadId (bool): indicate to load id
loadType (bool): indicate to load particle types
It loads a gadget-1 snapshot and return a PySimulationBase object.
"""
Returns:
It loads a gadget-1 snapshot and return a cosmotool.PySimulationBase_ object.
"""
cdef int flags, i, num_files
cdef list out_arrays
cdef SimuData ** data
@ -351,14 +457,22 @@ It loads a gadget-1 snapshot and return a PySimulationBase object.
if data[i] == <SimuData*>0:
out_arrays.append(None)
else:
out_arrays.append(_PySimulationAdaptor(wrap_simudata(data[i], flags)))
out_arrays.append(PySimulationAdaptor(wrap_simudata(data[i], flags)))
del_simudata(data)
return out_arrays
def writeGadget(str filename, object simulation):
"""writeGadget(filename, simulation)
This function attempts to write the content of the simulation object into
a file named `filename` using a Gadget-1 file format.
Arguments:
filename (str): output filename
simulation (PySimulationBase): a simulation object
"""
cdef SimuData simdata
cdef np.ndarray[np.float32_t, ndim=1] pos, vel
cdef np.ndarray[np.int64_t, ndim=1] ids
@ -408,7 +522,7 @@ def loadRamses(str basepath, int snapshot_id, int cpu_id, bool doublePrecision =
loadVelocity (bool): Whether to load velocities
Returns:
An object derived from PySimulationBase.
An object derived from PySimulationBase_.
"""
cdef int flags
cdef SimuData *data
@ -424,5 +538,5 @@ def loadRamses(str basepath, int snapshot_id, int cpu_id, bool doublePrecision =
if data == <SimuData*>0:
return None
return _PySimulationAdaptor(wrap_simudata(data, flags))
return PySimulationAdaptor(wrap_simudata(data, flags))

27
python/cosmotool/timing.py
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@ -3,35 +3,50 @@ from contextlib import contextmanager
@contextmanager
def time_block(name):
"""
This generator measure the time taken by a step, and prints the result
in second to the console.
Arguments:
name (str): prefix to print
"""
ts = time.time()
yield
te = time.time()
print '%s %2.2f sec' % \
(name, te-ts)
print ('%s %2.2f sec' % (name, te-ts))
def timeit(method):
"""This decorator add a timing request for each call to the decorated function.
Arguments:
method (function): the method to decorate
"""
def timed(*args, **kw):
ts = time.time()
result = method(*args, **kw)
te = time.time()
print '%r (%r, %r) %2.2f sec' % \
(method.__name__, args, kw, te-ts)
print ('%r (%r, %r) %2.2f sec' % (method.__name__, args, kw, te-ts))
return result
return timed
def timeit_quiet(method):
"""This decorator add a timing request for each call to the decorated function.
Same as cosmotool.timeit_ but is quieter by not printing the values of the arguments.
Arguments:
method (function): the method to decorate
"""
def timed(*args, **kw):
ts = time.time()
result = method(*args, **kw)
te = time.time()
print '%r %2.2f sec' % \
(method.__name__, te-ts)
print ('%r %2.2f sec' % (method.__name__, te-ts))
return result
return timed