write_param_card.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
__date__ = '02 Aug 2012'
__author__ = 'olivier.mattelaer@uclouvain.be'
 
from function_library import *
 
 
class ParamCardWriter(object):
 
    header = \
        """######################################################################\n""" \
        + """## PARAM_CARD AUTOMATICALY GENERATED BY THE UFO  #####################\n""" \
        + """######################################################################\n"""
 
    def __init__(
        self,
        filename,
        list_of_parameters=None,
        generic=False,
        ):
        """write a valid param_card.dat"""
 
        if not list_of_parameters:
            from parameters import all_parameters
            list_of_parameters = [param for param in all_parameters
                                  if param.nature == 'external']
 
        self.generic_output = generic
        if generic:
            self.define_not_dep_param(list_of_parameters)
 
        self.fsock = open(filename, 'w')
        self.fsock.write(self.header)
 
        self.write_card(list_of_parameters)
        self.fsock.close()
 
    def define_not_dep_param(self, list_of_parameters):
        """define self.dep_mass and self.dep_width in case that they are 
        requested in the param_card.dat"""
 
        from particles import all_particles
 
        self.dep_mass = [(part, part.mass) for part in all_particles
                         if part.pdg_code > 0 and part.mass
                         not in list_of_parameters]
        self.dep_width = [(part, part.width) for part in all_particles
                          if part.pdg_code > 0 and part.width
                          not in list_of_parameters]
 
    @staticmethod
    def order_param(obj1, obj2):
        """ order parameter of a given block """
 
        maxlen = min([len(obj1.lhacode), len(obj2.lhacode)])
 
        for i in range(maxlen):
            if obj1.lhacode[i] < obj2.lhacode[i]:
                return -1
            elif obj1.lhacode[i] == obj2.lhacode[i]:
                return 0
            else:
                return 1
        # identical up to the first finish
        if len(obj1.lhacode) > len(obj2.lhacode):
            return 1
        elif len(obj1.lhacode) == len(obj2.lhacode):
            return 0
        else:
            return -1
 
    def write_card(self, all_ext_param):
        """ """
 
        # list all lhablock
        all_lhablock = set([param.lhablock for param in all_ext_param])
 
        # ordonate lhablock alphabeticaly
        all_lhablock = list(all_lhablock)
        all_lhablock.sort()
        # put at the beginning SMINPUT + MASS + DECAY
        for name in ['DECAY', 'MASS', 'SMINPUTS']:
            if name in all_lhablock:
                all_lhablock.remove(name)
                all_lhablock.insert(0, name)
 
        for lhablock in all_lhablock:
            self.write_block(lhablock)
            need_writing = [param for param in all_ext_param if param.lhablock
                            == lhablock]
            need_writing.sort(self.order_param)
            [self.write_param(param, lhablock) for param in need_writing]
 
            if self.generic_output:
                if lhablock in ['MASS', 'DECAY']:
                    self.write_dep_param_block(lhablock)
 
        if self.generic_output:
            self.write_qnumber()
 
    def write_block(self, name):
        """ write a comment for a block"""
 
        self.fsock.writelines("""\n###################################"""
                              + """\n## INFORMATION FOR %s""" % name.upper()
                              + """
###################################
""")
        if name != 'DECAY':
            self.fsock.write("""Block %s \n""" % name)
 
    def write_param(self, param, lhablock):
 
        lhacode = """ """.join(['%3s' % key for key in param.lhacode])
        if lhablock != 'DECAY':
            text = """  %s %e # %s \n""" % (lhacode,
                    complex(param.value).real, param.name)
        else:
            text = '''DECAY %s %e \n''' % (lhacode, complex(param.value).real)
        self.fsock.write(text)
 
    def write_dep_param_block(self, lhablock):
        import cmath
        from parameters import all_parameters
        from particles import all_particles
        for parameter in all_parameters:
            exec '%s = %s' % (parameter.name, parameter.value)
        text = '##  Not dependent paramater.\n'
        text += '## Those values should be edited following analytical the \n'
        text += \
            '## analytical expression. Some generator could simply ignore \n'
        text += '## those values and use the analytical expression\n'
 
        if lhablock == 'MASS':
            data = self.dep_mass
            prefix = """ """
        else:
            data = self.dep_width
            prefix = 'DECAY '
 
        for (part, param) in data:
            if isinstance(param.value, str):
                value = complex(eval(param.value)).real
            else:
                value = param.value
 
            text += """%s %s %f # %s : %s \n""" % (prefix, part.pdg_code,
                    value, part.name, param.value)
        # If more than a particles has the same mass/width we need to write it here
        # as well
        if lhablock == 'MASS':
            arg = 'mass'
            done = [part for (part, param) in self.dep_mass]
        else:
            arg = 'width'
            done = [part for (part, param) in self.dep_width]
        for particle in all_particles:
            if particle.pdg_code < 0:
                continue
            is_define = True
            if particle not in done:
                if getattr(particle, arg).lhacode[0] != particle.pdg_code:
                    is_define = False
            if not is_define:
                value = float(particle.get(arg).value)
                name = particle.get(arg).name
                text += """%s %s %f # %s : %s \n""" % (prefix,
                        particle.pdg_code, value, particle.name, name)
 
        self.fsock.write(text)
 
    sm_pdg = [
        1,
        2,
        3,
        4,
        5,
        6,
        11,
        12,
        13,
        13,
        14,
        15,
        16,
        21,
        22,
        23,
        24,
        25,
        ]
    data = \
        """Block QNUMBERS %(pdg)d  # %(name)s 
        1 %(charge)d  # 3 times electric charge
        2 %(spin)d  # number of spin states (2S+1)
        3 %(color)d  # colour rep (1: singlet, 3: triplet, 8: octet)
        4 %(antipart)d  # Particle/Antiparticle distinction (0=own anti)
"""
 
    def write_qnumber(self):
        """ write qnumber """
 
        from particles import all_particles
        import particles
        print particles.__file__
        text = \
            """#===========================================================\n"""
        text += """# QUANTUM NUMBERS OF NEW STATE(S) (NON SM PDG CODE)\n"""
        text += \
            """#===========================================================
 
"""
 
        for part in all_particles:
            if part.pdg_code in self.sm_pdg or part.pdg_code < 0:
                continue
            text += self.data % {
                'pdg': part.pdg_code,
                'name': part.name,
                'charge': 3 * part.charge,
                'spin': part.spin,
                'color': part.color,
                'antipart': part.name != part.antiname and 1 or 0,
                }
 
        self.fsock.write(text)
 
 
if '__main__' == __name__:
    ParamCardWriter('./param_card.dat', generic=True)
    print 'write ./param_card.dat'