test_python.py
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#! /usr/bin/env python
from gammalib import *
from math import *
import os
#================#
# Test FITS file #
#================#
def test_fits():
"""
Test GFits interface.
"""
# Remove test files
try:
os.remove("test_python.fits")
os.remove("test_python_2.fits")
except:
pass
# Create FITS file
fits = GFits("test_python.fits")
# Print number of HDUs
print "Number of HDUs ..: " + str(fits.num_hdus())
# Allocate HDU "Testing"
hdu = GFitsHDU()
hdu.extname("Testing")
print "HDU name ........: " + hdu.extname()
print "HDU number ......: " + str(hdu.extno())
print "HDU type ........: " + str(hdu.exttype())
# Set header keywords
hdr = hdu.header()
hdr.update(GFitsHeaderCard("test", "test-value", "this is for testing"))
hdr.update(GFitsHeaderCard("real", 3.1415, "a real value"))
hdr.update(GFitsHeaderCard("int", 41, "an integer value"))
# Append HDU to FITS file
fits.append_hdu(hdu)
# Set double image
img1 = GFitsDblImage(100)
img2 = GFitsDblImage(10, 20)
img3 = GFitsDblImage(10, 10, 10)
img4 = GFitsDblImage(5, 9, 20, 20)
print img1
print img2
print img3
print img4
print img1.bitpix()
print img3.naxis()
print img2.naxes(0), img2.naxes(1)
print img4.num_pixels()
fits.append_hdu(GFitsHDU(img1))
fits.append_hdu(GFitsHDU(img2))
fits.append_hdu(GFitsHDU(img3))
fits.append_hdu(GFitsHDU(img4))
# Set ASCII table
tbl1 = GFitsAsciiTable(10)
col1 = GFitsTableDblCol("DOUBLE", 10)
col2 = GFitsTableFltCol("FLOAT", 10)
col3 = GFitsTableLngCol("LONG", 10)
col4 = GFitsTableShtCol("SHORT", 10)
col5 = GFitsTableStrCol("STRING", 10, 20)
col6 = GFitsTableLogCol("LOGICAL", 10)
for i in range(10):
col1.set(i, i*0.01)
col2.set(i, i*0.01)
col3.set(i, i*100)
col4.set(i, i*100)
col5.set(i, str(i*100))
col6.set(i, i % 2)
tbl1.append_column(col1)
#tbl1.append_column(col2) # FLOAT: datatype conversion overflow (status=412)
#tbl1.append_column(col3) # LONG: unknown TFORM datatype code (status=262)
#tbl1.append_column(col4) # SHORT: datatype conversion overflow (status=412)
tbl1.append_column(col5)
#tbl1.append_column(col6) # LOGICAL: unknown TFORM datatype code (status=262)
fits.append_hdu(GFitsHDU(tbl1))
# Set binary table
tbl2 = GFitsBinTable(10)
col1 = GFitsTableDblCol("DOUBLE", 10)
col2 = GFitsTableFltCol("FLOAT", 10)
col3 = GFitsTableLngCol("LONG", 10)
col4 = GFitsTableShtCol("SHORT", 10)
col5 = GFitsTableStrCol("STRING", 10, 20)
col6 = GFitsTableLogCol("LOGICAL", 10)
for i in range(10):
col1.set(i, i*0.01)
col2.set(i, i*0.01)
col3.set(i, i*100)
col4.set(i, i*100)
col5.set(i, str(i*100))
col6.set(i, i % 2)
tbl2.append_column(col1)
tbl2.append_column(col2)
tbl2.append_column(col3)
tbl2.append_column(col4)
tbl2.append_column(col5)
tbl2.append_column(col6)
fits.append_hdu(GFitsHDU(tbl2))
#print fits
# Save FITS file
fits.save()
# Save into another FITS file
fits.saveto("test_python_2.fits")
#=================#
# Test Node array #
#=================#
def test_node_array():
"""
Test GNodeArray interface.
"""
# Set-up vector and data array
vector = GVector(20)
data = GVector(20)
for i in range(20):
vector[i] = 10.0 + i*5.0
data[i] = sin(0.15*(vector[i]-10.0))
# Set-up node array
array = GNodeArray()
array.nodes(vector)
# Get values
x_val = []
y_val = []
for i in range(100):
x = i-10
array.set_value(x)
inx_left = array.inx_left()
inx_right = array.inx_right()
wgt_left = array.wgt_left()
wgt_right = array.wgt_right()
y = wgt_left*data[inx_left] + wgt_right*data[inx_right]
x_val.append(x)
y_val.append(y)
#===================#
# Test LAT response #
#===================#
def test_lat_response():
"""
Test GLATResponse interface.
"""
# Remove test file
try:
os.remove("test_rsp.fits")
except:
pass
# Allocate LAT response
rsp = GLATResponse()
# Set calibration database
rsp.set_caldb("irf/lat")
# Load response
rsp.load("Pass5_v0", "front")
# Save response
rsp.save("test_rsp.fits")
#======================#
# Test LAT observation #
#======================#
def test_lat_observation():
"""
Test GLATObservation interface.
"""
# Allocate LAT Observation
obs = GLATObservation("data/FT1_253582800.fits.gz", "data/FT2_253582800.fits.gz")
#
#print obs.ft1()
#print obs.ft2()
#==============#
# Test Healpix #
#==============#
def test_healpix():
"""
Test GHealpix interface.
"""
# Open exposure cube
fits = GFits("data/expCube_253582800.fits.gz")
# Lood Healpix table
pixels = GHealpix(fits.hdu("EXPOSURE"))
# Dump information
print pixels
# Control pix2ang / ang2pix
for i in range(pixels.npix()):
dir = pixels.pix2ang(i)
ipix = pixels.ang2pix(dir)
if (i != ipix):
print "GHealpix Trouble with pixel "+str(i)+" ("+str(ipix)+ \
"), RA="+str(dir.ra()*180/pi)+", Dec="+str(dir.dec()*180/pi)
# Control SkyDir coordinate transformation for all pixels
for i in range(pixels.npix()):
dir = pixels.pix2ang(i)
dir_new = GSkyDir()
dir_new.lb(dir.l(),dir.b())
dra = abs(dir.ra() - dir_new.ra())
if (dra >= 5.0):
dra -= 2.0*pi
ddec = abs(dir.dec() - dir_new.dec())
if (dra > 1.0e-9 or ddec > 1.0e-9):
print "GSkyDir Trouble with pixel "+str(i)+" ("+str(dra)+ \
","+str(ddec)+")"
#==========================#
# Main routine entry point #
#==========================#
if __name__ == '__main__':
"""
Perform testing.
"""
test_fits()
test_node_array()
test_lat_response()
test_lat_observation()
test_healpix()