#!/usr/bin/env python
import sys
import os
from optparse import OptionParser
sys.path.append('%s/Python/Modules' % os.path.expanduser('~'))
from eke import conversions
if __name__ == "__main__":
parser = OptionParser(usage="%prog <wavelength in nm>")
(options, args) = parser.parse_args()
if len(args) < 1:
print "Must provide an argument"
exit(1)
try:
argument = float(args[0])
except ValueError:
print "Invalid argument, can't convert to float"
exit(1)
print str(conversions.nm_to_ev(argument))+" eV"
"protein, virus, cell.")
parser.add_argument("-d", "--density", type=float,
help="If the material is an element, the density has "
"to be provided.")
args = parser.parse_args()
if not args.material:
print("Error: A material has to be specified.")
exit(1)
elif not (args.wavelength or args.energy):
print("Error: Energy or wavelength has to be specified.")
exit(1)
if args.energy:
energy = args.energy
else:
energy = conversions.nm_to_ev(args.wavelength)
if args.material in elements.ELEMENTS:
if not args.density:
print("Error: density has to be provided for this material.")
exit(1)
kwargs = {args.material: 1}
attenuation_length = elements.get_attenuation_length(
energy, elements.Material(args.density, **kwargs))
elif args.material.lower() in elements.MATERIALS.keys():
attenuation_length = elements.get_attenuation_length(
energy, elements.MATERIALS[args.material.lower()])
else:
print("Error: invalid material.")
exit(1)
#!/usr/bin/env python
import argparse
from eke import conversions
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("wavelength", type=float, help="Wavelength [nm]")
args = parser.parse_args()
print("{0} eV".format(conversions.nm_to_ev(args.wavelength)))
parser.add_option("-m", action="store", type="string", dest="material",
help="Material. Can be an element or one of water, protein, virus, cell.")
parser.add_option("-d", action="store", type="float", dest="density",
help="If the material is an element, the density has to be provided.")
(options,argv) = parser.parse_args()
if not options.material:
print "Error: A material has to be specified."
exit(1)
elif not (options.wavelength or options.energy):
print "Error: Energy or wavelength has to be specified."
exit(1)
if options.energy:
energy = options.energy
else:
energy = conversions.nm_to_ev(options.wavelength)
if options.material in elements.elements:
if not options.density:
print "Error: density has to be provided for this material."
exit(1)
kwargs = {options.material : 1}
attenuation_length = elements.get_attenuation_length(energy,elements.Material(options.density,
**kwargs))
elif options.material.lower() in elements.materials.keys():
attenuation_length = elements.get_attenuation_length(energy,elements.materials[options.material.lower()])
else:
print "Error: invalid material."
exit(1)
print "%g um" % (attenuation_length*1e6)