import sys import time import os import subprocess import shlex from fractions import Fraction from functools import reduce from optparse import Option import numpy as np class bcolors: """ ASCII Colors (Blender code). https://svn.blender.org/svnroot/bf-blender/trunk/blender/build_files/scons/tools/bcolors.py http://stackoverflow.com/questions/287871/print-in-terminal-with-colors-using-python """ HEADER = '\033[95m' OKBLUE = '\033[94m' OKGREEN = '\033[92m' WARNING = '\033[93m' FAIL = '\033[91m' ENDC = '\033[0m' BOLD = '\033[1m' DIM = '\033[2m' UNDERLINE = '\033[4m' CROSSOUT = '\033[9m' def disable(self): self.HEADER = '' self.OKBLUE = '' self.OKGREEN = '' self.WARNING = '' self.FAIL = '' self.ENDC = '' self.BOLD = '' self.UNDERLINE = '' self.CROSSOUT = '' def srepr(arg,glue = '\n'): r""" Join arguments as individual lines. Parameters ---------- arg : iterable Items to join. glue : str, optional Defaults to \n. """ if (not hasattr(arg, "strip") and (hasattr(arg, "__getitem__") or hasattr(arg, "__iter__"))): return glue.join(str(x) for x in arg) return arg if isinstance(arg,str) else repr(arg) def croak(what, newline = True): """ Write formated to stderr. Parameters ---------- what : str or iterable Content to be displayed newline : bool, optional Separate items of what by newline. Defaults to True. """ if not what: sys.stderr.write(srepr(what,glue = '\n') + ('\n' if newline else '')) sys.stderr.flush() def report(who = None, what = None): """ Reports script and file name. DEPRECATED """ croak( (emph(who)+': ' if who is not None else '') + (what if what is not None else '') + '\n' ) def emph(what): """Formats string with emphasis.""" return bcolors.BOLD+srepr(what)+bcolors.ENDC def deemph(what): """Formats string with deemphasis.""" return bcolors.DIM+srepr(what)+bcolors.ENDC def delete(what): """Formats string as deleted.""" return bcolors.DIM+srepr(what)+bcolors.ENDC def strikeout(what): """Formats string as strikeout.""" return bcolors.CROSSOUT+srepr(what)+bcolors.ENDC def execute(cmd, streamIn = None, wd = './', env = None): """ Execute command. Parameters ---------- cmd : str Command to be executed. streanIn :, optional Input (via pipe) for executed process. wd : str, optional Working directory of process. Defaults to ./ . env : Environment """ initialPath = os.getcwd() os.chdir(wd) myEnv = os.environ if env is None else env process = subprocess.Popen(shlex.split(cmd), stdout = subprocess.PIPE, stderr = subprocess.PIPE, stdin = subprocess.PIPE, env = myEnv) out,error = [i for i in (process.communicate() if streamIn is None else process.communicate(streamIn.read().encode('utf-8')))] out = out.decode('utf-8').replace('\x08','') error = error.decode('utf-8').replace('\x08','') os.chdir(initialPath) if process.returncode != 0: raise RuntimeError('{} failed with returncode {}'.format(cmd,process.returncode)) return out,error class extendableOption(Option): """ Used for definition of new option parser action 'extend', which enables to take multiple option arguments. Adopted from online tutorial http://docs.python.org/library/optparse.html DEPRECATED """ 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) def progressBar(iteration, total, prefix='', bar_length=50): """ Call in a loop to create terminal progress bar. From https://gist.github.com/aubricus/f91fb55dc6ba5557fbab06119420dd6a Parameters ---------- iteration : int Current iteration. total : int Total iterations. prefix : str, optional Prefix string. bar_length : int, optional Character length of bar. Defaults to 50. """ fraction = iteration / float(total) if not hasattr(progressBar, "last_fraction"): # first call to function progressBar.start_time = time.time() progressBar.last_fraction = -1.0 remaining_time = ' n/a' else: if fraction <= progressBar.last_fraction or iteration == 0: # reset: called within a new loop progressBar.start_time = time.time() progressBar.last_fraction = -1.0 remaining_time = ' n/a' else: progressBar.last_fraction = fraction remainder = (total - iteration) * (time.time()-progressBar.start_time)/iteration remaining_time = '{: 3d}:'.format(int( remainder//3600)) + \ '{:02d}:'.format(int((remainder//60)%60)) + \ '{:02d}' .format(int( remainder %60)) filled_length = int(round(bar_length * fraction)) bar = '█' * filled_length + '░' * (bar_length - filled_length) sys.stderr.write('\r{} {} {}'.format(prefix, bar, remaining_time)), if iteration == total: sys.stderr.write('\n') sys.stderr.flush() def scale_to_coprime(v): """Scale vector to co-prime (relatively prime) integers.""" MAX_DENOMINATOR = 1000 def get_square_denominator(x): """Denominator of the square of a number.""" return Fraction(x ** 2).limit_denominator(MAX_DENOMINATOR).denominator def lcm(a, b): """Least common multiple.""" return a * b // np.gcd(a, b) denominators = [int(get_square_denominator(i)) for i in v] s = reduce(lcm, denominators) ** 0.5 m = (np.array(v)*s).astype(np.int) return m//reduce(np.gcd,m) class return_message(): """Object with formatted return message.""" def __init__(self,message): """ Sets return message. Parameters ---------- message : str or list of str message for output to screen """ self.message = message def __repr__(self): """Return message suitable for interactive shells.""" return srepr(self.message)