92 lines
2.4 KiB
Python
92 lines
2.4 KiB
Python
import sys
|
|
import collections
|
|
import random
|
|
import string
|
|
from cStringIO import StringIO
|
|
|
|
|
|
def import_class(cls):
|
|
module = '.'.join(cls.split('.')[:-1])
|
|
cls = cls.split('.')[-1]
|
|
module = __import__(module, fromlist=[module])
|
|
return getattr(module, cls)
|
|
|
|
|
|
def random_ascii(length):
|
|
return ''.join([random.choice(string.hexdigits) for i in range(0, length)]).lower()
|
|
|
|
|
|
class OrderedSet(collections.MutableSet):
|
|
def __init__(self, iterable=None):
|
|
self.end = end = []
|
|
end += [None, end, end] # sentinel node for doubly linked list
|
|
self.map = {} # key --> [key, prev, next]
|
|
if iterable is not None:
|
|
self |= iterable
|
|
|
|
def __len__(self):
|
|
return len(self.map)
|
|
|
|
def __contains__(self, key):
|
|
return key in self.map
|
|
|
|
def add(self, key):
|
|
if key not in self.map:
|
|
end = self.end
|
|
curr = end[1]
|
|
curr[2] = end[1] = self.map[key] = [key, curr, end]
|
|
|
|
def discard(self, key):
|
|
if key in self.map:
|
|
key, prev, next = self.map.pop(key)
|
|
prev[2] = next
|
|
next[1] = prev
|
|
|
|
def __iter__(self):
|
|
end = self.end
|
|
curr = end[2]
|
|
while curr is not end:
|
|
yield curr[0]
|
|
curr = curr[2]
|
|
|
|
def __reversed__(self):
|
|
end = self.end
|
|
curr = end[1]
|
|
while curr is not end:
|
|
yield curr[0]
|
|
curr = curr[1]
|
|
|
|
def pop(self, last=True):
|
|
if not self:
|
|
raise KeyError('set is empty')
|
|
key = self.end[1][0] if last else self.end[2][0]
|
|
self.discard(key)
|
|
return key
|
|
|
|
def __repr__(self):
|
|
if not self:
|
|
return '%s()' % (self.__class__.__name__,)
|
|
return '%s(%r)' % (self.__class__.__name__, list(self))
|
|
|
|
def __eq__(self, other):
|
|
if isinstance(other, OrderedSet):
|
|
return len(self) == len(other) and list(self) == list(other)
|
|
return set(self) == set(other)
|
|
|
|
|
|
class AttrDict(dict):
|
|
def __init__(self, *args, **kwargs):
|
|
super(AttrDict, self).__init__(*args, **kwargs)
|
|
self.__dict__ = self
|
|
|
|
|
|
class CaptureStdout(list):
|
|
def __enter__(self):
|
|
self._stdout = sys.stdout
|
|
sys.stdout = self._stringio = StringIO()
|
|
return self
|
|
|
|
def __exit__(self, *args):
|
|
self.extend(self._stringio.getvalue().splitlines())
|
|
sys.stdout = self._stdout
|