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"""
Useful functions and classes, mostly relating to the Pattern class
but used in multiple sub-packages of FoxDot.
"""
import sys
import json
from socket import timeout as socket_timeout
from urllib.request import urlopen
from urllib.error import URLError
def get_pypi_version():
""" Returns the most up-to-date version number on PyPI. Return None on error """
try:
addr = "https://pypi.org/pypi/FoxDot/json"
page = urlopen(addr, timeout=2.5)
data = json.loads(page.read().decode("utf-8"))
version = data["info"]["version"]
except (URLError, socket_timeout):
version = None
return version
def stdout(*args):
""" Forces prints to stdout and not console """
sys.__stdout__.write(" ".join([str(s) for s in args]) + "\n")
def sliceToRange(s):
start = s.start if s.start is not None else 0
stop = s.stop
step = s.step if s.step is not None else 1
try:
return list(range(start, stop, step))
except OverflowError:
raise TypeError("range() integer end argument expected, got NoneType")
def LCM(*args):
""" Lowest Common Multiple """
args = [n for n in args if n != 0]
# Base case
if len(args) == 0:
return 1
elif len(args) == 1:
return args[0]
X = list(args)
while any([X[0]!=K for K in X]):
i = X.index(min(X))
X[i] += args[i]
return X[0]
def EuclidsAlgorithm(n, k, lo=0, hi=1):
if n == 0: return [n for i in range(k)]
data = [[hi if i < n else lo] for i in range(k)]
while True:
k = k - n
if k <= 1:
break
elif k < n:
n, k = k, n
for i in range(n):
data[i] += data[-1]
del data[-1]
return [x for y in data for x in y]
def PulsesToDurations(data):
""" Returns a list of durations based on pulses (1s) and blanks (0s).
Data should be a list of [1,0] where 1 is a pulse. """
count, seq = 1, []
for item in data[1:]:
if item == 1:
seq.append(count)
count = 1
else:
count += 1
seq.append(count)
return seq
def get_first_item(array):
""" Returns first item from a possibly nested list"""
try:
return get_first_item(array[0])
except (TypeError, IndexError):
return array
def modi(array, i, debug=0):
""" Returns the modulo index i.e. modi([0,1,2],4) will return 1 """
try:
return array[i % len(array)]
except(TypeError, AttributeError, ZeroDivisionError):
return array
def get_expanded_len(data):
""" (0,(0,2)) returns 4. int returns 1 """
if type(data) is str and len(data) == 1:
return 1
l = []
try:
for item in data:
try:
l.append(get_expanded_len(item))
except(TypeError, AttributeError):
l.append(1)
return LCM(*l) * len(data)
except TypeError:
return 1
def max_length(*patterns):
""" Returns the largest length pattern """
return max([len(p) for p in patterns])
def get_inverse_op(method):
""" Returns the opposite __dunder__ method e.g.
get_inverse_op("__add__") -> "__radd__"
get_inverse_op("__ror__") -> "__or__"
"""
if method.startswith("__r"):
return method.replace("__r", "__")
elif method.startswith("__"):
return method.replace("__", "__r", 1)
return method
def isiterable(obj):
""" Returns true if an object is iterable by using `iter(obj)`"""
try:
iter(obj)
return True
except:
return False
def recursive_any(seq):
""" Like any but checks lists recursively """
for item in seq:
if isiterable(item):
if recursive_any(item):
return True
else:
if bool(item):
return True
else:
return False
# Classes
class dots:
""" Class for representing long Patterns in strings """
def __repr__(self):
return '...'
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