DAMASK_EICMD/python/damask/util.py

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Python
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import sys
import datetime
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import os
import subprocess
import shlex
import fractions
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from functools import reduce
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from optparse import Option
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import numpy as np
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# limit visibility
__all__=[
'srepr',
'croak',
'report',
'emph','deemph','delete','strikeout',
'execute',
'show_progress',
'scale_to_coprime',
'return_message',
'extendableOption',
]
####################################################################################################
# Functions
####################################################################################################
def srepr(arg,glue = '\n'):
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r"""
Join arguments with glue string.
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 what is not None:
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.
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DEPRECATED
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"""
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
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def execute(cmd,
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stream_in = None,
wd = './',
env = None):
"""
Execute command.
Parameters
----------
cmd : str
Command to be executed.
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stream_in : file object, optional
Input (via pipe) for executed process.
wd : str, optional
Working directory of process. Defaults to ./ .
env : dict, optional
Environment for execution.
"""
initialPath = os.getcwd()
myEnv = os.environ if env is None else env
os.chdir(wd)
process = subprocess.Popen(shlex.split(cmd),
stdout = subprocess.PIPE,
stderr = subprocess.PIPE,
stdin = subprocess.PIPE,
env = myEnv)
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stdout, stderr = [i for i in (process.communicate() if stream_in is None
else process.communicate(stream_in.read().encode('utf-8')))]
os.chdir(initialPath)
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stdout = stdout.decode('utf-8').replace('\x08','')
stderr = stderr.decode('utf-8').replace('\x08','')
if process.returncode != 0:
raise RuntimeError('{} failed with returncode {}'.format(cmd,process.returncode))
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return stdout, stderr
def show_progress(iterable,N_iter=None,prefix='',bar_length=50):
"""
Decorate a loop with a status bar.
Use similar like enumerate.
Parameters
----------
iterable : iterable/function with yield statement
Iterable (or function with yield statement) to be decorated.
N_iter : int
Total # of iterations. Needed if number of iterations can not be obtained as len(iterable).
prefix : str, optional.
Prefix string.
bar_length : int, optional
Character length of bar. Defaults to 50.
"""
status = _ProgressBar(N_iter if N_iter else len(iterable),prefix,bar_length)
for i,item in enumerate(iterable):
yield item
status.update(i)
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 fractions.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)
####################################################################################################
# Classes
####################################################################################################
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
"""
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ACTIONS = Option.ACTIONS + ("extend",)
STORE_ACTIONS = Option.STORE_ACTIONS + ("extend",)
TYPED_ACTIONS = Option.TYPED_ACTIONS + ("extend",)
ALWAYS_TYPED_ACTIONS = Option.ALWAYS_TYPED_ACTIONS + ("extend",)
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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)
class _ProgressBar:
"""
Report progress of an interation as a status bar.
Works for 0-based loops, ETA is estimated by linear extrapolation.
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"""
def __init__(self,total,prefix,bar_length):
"""
Inititalize a progress bar to current time as basis for ETA estimation.
Parameters
----------
total : int
Total # of iterations.
prefix : str
Prefix string.
bar_length : int
Character length of bar.
"""
self.total = total
self.prefix = prefix
self.bar_length = bar_length
self.start_time = datetime.datetime.now()
self.last_fraction = 0.0
sys.stderr.write('{} {} 0% ETA n/a'.format(self.prefix, ''*self.bar_length))
sys.stderr.flush()
def update(self,iteration):
fraction = (iteration+1) / self.total
if int(self.bar_length * fraction) > int(self.bar_length * self.last_fraction):
delta_time = datetime.datetime.now() - self.start_time
remaining_time = (self.total - (iteration+1)) * delta_time / (iteration+1)
remaining_time -= datetime.timedelta(microseconds=remaining_time.microseconds) # remove μs
filled_length = int(self.bar_length * fraction)
bar = '' * filled_length + '' * (self.bar_length - filled_length)
sys.stderr.write('\r{} {} {:>4.0%} ETA {}'.format(self.prefix, bar, fraction, remaining_time))
sys.stderr.flush()
self.last_fraction = fraction
if iteration == self.total - 1:
sys.stderr.write('\n')
sys.stderr.flush()
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class bcolors:
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"""
ASCII Colors.
https://svn.blender.org/svnroot/bf-blender/trunk/blender/build_files/scons/tools/bcolors.py
https://stackoverflow.com/questions/287871
"""
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 = ''
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)