DAMASK_EICMD/processing/post/addCalculation.py

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#!/usr/bin/env python
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import os,re,sys,math,string,damask
from optparse import OptionParser, Option
# -----------------------------
class extendableOption(Option):
# -----------------------------
# used for definition of new option parser action 'extend', which enables to take multiple option arguments
# taken from online tutorial http://docs.python.org/library/optparse.html
ACTIONS = Option.ACTIONS + ("extend",)
STORE_ACTIONS = Option.STORE_ACTIONS + ("extend",)
TYPED_ACTIONS = Option.TYPED_ACTIONS + ("extend",)
ALWAYS_TYPED_ACTIONS = Option.ALWAYS_TYPED_ACTIONS + ("extend",)
def take_action(self, action, dest, opt, value, values, parser):
if action == "extend":
lvalue = value.split(",")
values.ensure_value(dest, []).extend(lvalue)
else:
Option.take_action(self, action, dest, opt, value, values, parser)
# --------------------------------------------------------------------
# MAIN
# --------------------------------------------------------------------
parser = OptionParser(option_class=extendableOption, usage='%prog options [file[s]]', description = """
Add column(s) with derived values according to user defined arithmetic operation between column(s).
Example: distance to IP coordinates -- "math.sqrt( #ip.x#**2 + #ip.y#**2 + #ip.z#**2 )"
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""" + string.replace('$Id$','\n','\\n')
)
parser.add_option('-l','--label', dest='labels', action='extend', type='string', \
help='(list of) new column labels')
parser.add_option('-f','--formula', dest='formulas', action='extend', type='string', \
help='(list of) formulas corresponding to labels')
parser.set_defaults(labels= [])
parser.set_defaults(formulas= [])
(options,filenames) = parser.parse_args()
if len(options.labels) != len(options.formulas):
parser.error('number of labels (%i) and formulas (%i) do not match'%(len(options.labels),len(options.formulas)))
# ------------------------------------------ setup file handles ---------------------------------------
files = []
if filenames == []:
files.append({'name':'STDIN', 'input':sys.stdin, 'output':sys.stdout})
else:
for name in filenames:
if os.path.exists(name):
files.append({'name':name, 'input':open(name), 'output':open(name+'_tmp','w')})
# ------------------------------------------ loop over input files ---------------------------------------
for file in files:
if file['name'] != 'STDIN': print file['name']
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table = damask.ASCIItable(file['input'],file['output'],False) # make unbuffered ASCII_table
table.head_read() # read ASCII header info
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table.info_append(string.replace('$Id$','\n','\\n') + \
'\t' + ' '.join(sys.argv[1:]))
column = {}
evaluator = {}
for label,formula in zip(options.labels,options.formulas):
table.labels_append(label)
interpolator = []
operands = re.findall(r'#(.+?)#',formula)
for operand in operands:
if not operand in column:
try:
column[operand] = table.labels.index(operand)
except:
parser.error('column %s not found...\n'%operand)
interpolator += ['float(table.data[%i])'%column[operand]]
for operand in operands:
formula = formula.replace('#'+operand+'#','%e')
evaluator[label] = "'" + formula + "'%(" + ','.join(interpolator) + ")"
# ------------------------------------------ assemble header ---------------------------------------
table.head_write()
# ------------------------------------------ process data ---------------------------------------
while table.data_read(): # read next data line of ASCII table
for label in options.labels:
table.data_append(eval(eval(evaluator[label])))
table.data_write() # output processed line
# ------------------------------------------ output result ---------------------------------------
table.output_flush() # just in case of buffered ASCII table
file['input'].close() # close input ASCII table
if file['name'] != 'STDIN':
file['output'].close # close output ASCII table
os.rename(file['name']+'_tmp',file['name']) # overwrite old one with tmp new