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)