Update existing value(s) to expression(s) respecting condition.
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Aritra Chakraborty
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#!/usr/bin/env python
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# -*- coding: UTF-8 no BOM -*-
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import os,re,sys,string,fnmatch,math,random,numpy as np
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from optparse import OptionParser
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import damask
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scriptID = string.replace('$Id: fillTable.py$','\n','\\n')
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scriptName = os.path.splitext(scriptID.split()[1])[0]
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def unravel(item):
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if hasattr(item,'__contains__'): return ' '.join(map(unravel,item))
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else: return str(item)
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# --------------------------------------------------------------------
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# MAIN
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# --------------------------------------------------------------------
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parser = OptionParser(option_class=damask.extendableOption, usage='%prog options [file[s]]', description = """
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Update existing value(s) to expression(s) respecting condition.
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Examples:
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Replace the 2nd value of column x by value "z - y" --> fillTable -l x -c "#_row_#==2" -f "#z#-#y#"
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""", version = scriptID)
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parser.add_option('-l','--label',
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dest = 'labels',
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action = 'extend', metavar = '<string LIST>',
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help = '(list) of columns to be filled with formula(e)')
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parser.add_option('-f','--formula',
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dest = 'formulae',
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action = 'extend', metavar = '<string LIST>',
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help = '(list of) formulae corresponding to labels')
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parser.add_option('-c','--condition',
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dest = 'condition', metavar='string',
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help = 'condition to filter rows')
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parser.set_defaults(condition = '',
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)
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(options,filenames) = parser.parse_args()
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if options.labels == None or options.formulae == None:
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parser.error('no formulae specified.')
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if len(options.labels) != len(options.formulae):
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parser.error('number of labels ({}) and formulae ({}) do not match.'.format(len(options.labels),len(options.formulae)))
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for i in xrange(len(options.formulae)):
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options.formulae[i] = options.formulae[i].replace(';',',')
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# --- loop over input files -------------------------------------------------------------------------
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if filenames == []: filenames = [None]
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for name in filenames:
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try:
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table = damask.ASCIItable(name = name,
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buffered = False)
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except: continue
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table.croak('\033[1m'+scriptName+'\033[0m'+(': '+name if name else ''))
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# ------------------------------------------ assemble info ---------------------------------------
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table.head_read()
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# ------------------------------------------ Evaluate condition ---------------------------------------
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specials = { \
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'_row_': 0,
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}
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labels = []
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positions = []
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for position,label in enumerate(table.labels):
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checker = [position in table.label_indexrange(needle) for needle in options.labels]
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if any(checker) == True:
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labels.append(label)
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positions.append(position)
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interpolator = []
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condition = options.condition # copy per file, might be altered
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for position,operand in enumerate(set(re.findall(r'#(([s]#)?(.+?))#',condition))): # find three groups
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condition = condition.replace('#'+operand[0]+'#',
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{ '': '{%i}'%position,
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's#':'"{%i}"'%position}[operand[1]])
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if operand[2] in specials: # special label
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interpolator += ['specials["%s"]'%operand[2]]
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else:
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try:
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interpolator += ['%s(table.data[%i])'%({ '':'float',
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's#':'str'}[operand[1]],
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table.labels.index(operand[2]))]
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except:
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parser.error('column %s not found...\n'%operand[2])
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evaluator_condition = "'" + condition + "'.format(" + ','.join(interpolator) + ")"
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#----------------------------------- Formula -------------------------------------------------------
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evaluator = {}
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brokenFormula = {}
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for label,formula in zip(options.labels,options.formulae):
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for column in re.findall(r'#(.+?)#',formula): # loop over column labels in formula
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idx = table.label_index(column)
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dim = table.label_dimension(column)
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if column in specials:
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replacement = 'specials["{}"]'.format(column)
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elif dim == 1: # scalar input
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replacement = 'float(table.data[{}])'.format(idx) # take float value of data column
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elif dim > 1: # multidimensional input (vector, tensor, etc.)
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replacement = 'np.array(table.data[{}:{}],dtype=float)'.format(idx,idx+dim) # use (flat) array representation
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else:
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table.croak('column {} not found...'.format(column))
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brokenFormula[label] = True
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break
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formula = formula.replace('#'+column+'#',replacement)
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if label not in brokenFormula:
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evaluator[label] = formula
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# ------------------------------------------ assemble header ---------------------------------------
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table.info_append(scriptID + '\t' + ' '.join(sys.argv[1:])) # read ASCII header info
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table.labels # update with label set
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table.head_write()
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# ------------------------------------------ process data ------------------------------------------
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outputAlive = True
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while outputAlive and table.data_read(): # read next data line of ASCII table
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specials['_row_'] += 1
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if condition == '' or eval(eval(evaluator_condition)): # location of change
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for label in [x for x in options.labels if x not in set(brokenFormula)]:
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for i in xrange(len(positions)):
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table.data[positions[i]] = unravel(eval(evaluator[label]))
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outputAlive = table.data_write() # output processed line
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# ------------------------------------------ output finalization -----------------------------------
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table.close() # close ASCII tables
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