132 lines
6.0 KiB
Python
Executable File
132 lines
6.0 KiB
Python
Executable File
#!/usr/bin/env python
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# -*- coding: UTF-8 no BOM -*-
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import os,re,sys,fnmatch,math,string,damask
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from optparse import OptionParser, Option
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scriptID = '$Id$'
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scriptName = scriptID.split()[1]
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# -----------------------------
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class extendableOption(Option):
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# -----------------------------
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# used for definition of new option parser action 'extend', which enables to take multiple option arguments
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# taken from online tutorial http://docs.python.org/library/optparse.html
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ACTIONS = Option.ACTIONS + ("extend",)
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STORE_ACTIONS = Option.STORE_ACTIONS + ("extend",)
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TYPED_ACTIONS = Option.TYPED_ACTIONS + ("extend",)
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ALWAYS_TYPED_ACTIONS = Option.ALWAYS_TYPED_ACTIONS + ("extend",)
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def take_action(self, action, dest, opt, value, values, parser):
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if action == "extend":
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lvalue = value.split(",")
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values.ensure_value(dest, []).extend(lvalue)
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else:
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Option.take_action(self, action, dest, opt, value, values, parser)
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# --------------------------------------------------------------------
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# MAIN
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# --------------------------------------------------------------------
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parser = OptionParser(option_class=extendableOption, usage='%prog options [file[s]]', description = """
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Filter rows according to condition and columns by either white or black listing.
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Examples:
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Every odd row if x coordinate is positive -- " #ip.x# >= 0.0 and #_row_#%2 == 1 ).
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All rows where label 'foo' equals 'bar' -- " #foo# == \"bar\" "
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""" + string.replace(scriptID,'\n','\\n')
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)
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parser.add_option('-w','--white', dest='whitelist', action='extend', type='string', \
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help='white list of column labels (a,b,c,...)', metavar='<LIST>')
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parser.add_option('-b','--black', dest='blacklist', action='extend', type='string', \
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help='black list of column labels (a,b,c,...)', metavar='<LIST>')
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parser.add_option('-c','--condition', dest='condition', type='string', \
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help='condition to filter rows', metavar='<EXPR>')
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parser.set_defaults(whitelist = [])
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parser.set_defaults(blacklist = [])
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parser.set_defaults(condition = '')
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(options,filenames) = parser.parse_args()
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# ------------------------------------------ setup file handles ---------------------------------------
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files = []
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if filenames == []:
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files.append({'name':'STDIN', 'input':sys.stdin, 'output':sys.stdout, 'croak':sys.stderr})
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else:
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for name in filenames:
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if os.path.exists(name):
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files.append({'name':name, 'input':open(name), 'output':open(name+'_tmp','w'), 'croak':sys.stderr})
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# ------------------------------------------ loop over input files ---------------------------------------
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for file in files:
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if file['name'] != 'STDIN': file['croak'].write('\033[1m'+scriptName+'\033[0m: '+file['name']+'\n')
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else: file['croak'].write('\033[1m'+scriptName+'\033[0m\n')
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specials = { \
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'_row_': 0,
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}
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table = damask.ASCIItable(file['input'],file['output'],buffered = False) # make unbuffered ASCII_table
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table.head_read() # read ASCII header info
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table.info_append(string.replace(scriptID,'\n','\\n') + \
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'\t' + ' '.join(sys.argv[1:]))
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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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if (options.whitelist == [] or any([fnmatch.fnmatch(label,needle) for needle in options.whitelist])) \
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and (options.blacklist == [] or not any([fnmatch.fnmatch(label,needle) for needle in options.blacklist])): # a label to keep?
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labels.append(label) # remember name...
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positions.append(position) # ...and position
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interpolator = []
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for position,operand in enumerate(set(re.findall(r'#(([s]#)?(.+?))#',options.condition))): # find three groups
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options.condition = options.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 = "'" + options.condition + "'.format(" + ','.join(interpolator) + ")"
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# ------------------------------------------ assemble header ---------------------------------------
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table.labels = labels # update with new 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 # count row
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if options.condition == '' or eval(eval(evaluator)): # valid row ?
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table.data = [table.data[position] for position in positions] # retain filtered columns
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outputAlive = table.data_write() # output processed line
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# ------------------------------------------ output result ---------------------------------------
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outputAlive and table.output_flush() # just in case of buffered ASCII table
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file['input'].close() # close input ASCII table
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if file['name'] != 'STDIN':
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file['output'].close() # close output ASCII table
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os.rename(file['name']+'_tmp',file['name']) # overwrite old one with tmp new
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