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# coding: utf-8
from __future__ import print_function
# partially from package six by Benjamin Peterson
import sys
import os
import types
if False: # MYPY
from typing import Any, Dict, Optional, List, Union, BinaryIO, IO, Text, Tuple # NOQA
try:
from ruamel.ordereddict import ordereddict
except:
try:
from collections import OrderedDict
except ImportError:
from ordereddict import OrderedDict # type: ignore
# to get the right name import ... as ordereddict doesn't do that
class ordereddict(OrderedDict): # type: ignore
if not hasattr(OrderedDict, 'insert'):
def insert(self, pos, key, value):
# type: (int, Any, Any) -> None
if pos >= len(self):
self[key] = value
return
od = ordereddict()
od.update(self)
for k in od:
del self[k]
for index, old_key in enumerate(od):
if pos == index:
self[key] = value
self[old_key] = od[old_key]
PY2 = sys.version_info[0] == 2
PY3 = sys.version_info[0] == 3
if PY3:
def utf8(s):
# type: (str) -> str
return s
def to_str(s):
# type: (str) -> str
return s
def to_unicode(s):
# type: (str) -> str
return s
else:
def utf8(s):
# type: (unicode) -> str
return s.encode('utf-8')
def to_str(s):
# type: (str) -> str
return str(s)
def to_unicode(s):
# type: (str) -> unicode
return unicode(s)
if PY3:
string_types = str
integer_types = int
class_types = type
text_type = str
binary_type = bytes
MAXSIZE = sys.maxsize
unichr = chr
import io
StringIO = io.StringIO
BytesIO = io.BytesIO
else:
string_types = basestring
integer_types = (int, long)
class_types = (type, types.ClassType)
text_type = unicode
binary_type = str
# to allow importing
unichr = unichr # type: ignore
from StringIO import StringIO as _StringIO
StringIO = _StringIO
import cStringIO
BytesIO = cStringIO.StringIO
if False: # MYPY
# StreamType = Union[BinaryIO, IO[str], IO[unicode], StringIO]
StreamType = Union[BinaryIO, IO[str], StringIO]
StreamTextType = Union[Text, StreamType]
VersionType = Union[List[int], str, Tuple[int, int]]
if PY3:
builtins_module = 'builtins'
else:
builtins_module = '__builtin__'
def with_metaclass(meta, *bases):
# type: (Any, Any) -> Any
"""Create a base class with a metaclass."""
return meta("NewBase", bases, {})
DBG_TOKEN = 1
DBG_EVENT = 2
DBG_NODE = 4
_debug = None # type: Union[None, int]
if bool(_debug):
class ObjectCounter(object):
def __init__(self):
# type: () -> None
self.map = {} # type: Dict[Any, Any]
def __call__(self, k):
# type: (Any) -> None
self.map[k] = self.map.get(k, 0) + 1
def dump(self):
# type: () -> None
for k in sorted(self.map):
print(k, '->', self.map[k])
object_counter = ObjectCounter()
# used from yaml util when testing
def dbg(val=None):
# type: (Any) -> Any
global _debug
if _debug is None:
# set to true or false
_debugx = os.environ.get('YAMLDEBUG')
if _debugx is None:
_debug = 0
else:
_debug = int(_debugx)
if val is None:
return _debug
return _debug & val
def nprint(*args, **kw):
# type: (Any, Any) -> None
if bool(dbg):
print(*args, **kw)
# char checkers following production rules
def check_namespace_char(ch):
# type: (Any) -> bool
if u'\x21' <= ch <= u'\x7E': # ! to ~
return True
if u'\xA0' <= ch <= u'\xD7FF':
return True
if (u'\xE000' <= ch <= u'\xFFFD') and ch != u'\xFEFF': # excl. byte order mark
return True
if u'\x10000' <= ch <= u'\x10FFFF':
return True
return False
def check_anchorname_char(ch):
# type: (Any) -> bool
if ch in u',[]{}':
return False
return check_namespace_char(ch)
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