|
|
# coding: utf-8
|
|
|
"""Compatibility tricks for Python 3. Mainly to do with unicode."""
|
|
|
import sys
|
|
|
import types
|
|
|
|
|
|
orig_open = open
|
|
|
|
|
|
def no_code(x, encoding=None):
|
|
|
return x
|
|
|
|
|
|
def decode(s, encoding=None):
|
|
|
encoding = encoding or sys.stdin.encoding or sys.getdefaultencoding()
|
|
|
return s.decode(encoding, "replace")
|
|
|
|
|
|
def encode(u, encoding=None):
|
|
|
encoding = encoding or sys.stdin.encoding or sys.getdefaultencoding()
|
|
|
return u.encode(encoding, "replace")
|
|
|
|
|
|
def cast_unicode(s, encoding=None):
|
|
|
if isinstance(s, bytes):
|
|
|
return decode(s, encoding)
|
|
|
return s
|
|
|
|
|
|
def cast_bytes(s, encoding=None):
|
|
|
if not isinstance(s, bytes):
|
|
|
return encode(s, encoding)
|
|
|
return s
|
|
|
|
|
|
if sys.version_info[0] >= 3:
|
|
|
PY3 = True
|
|
|
|
|
|
input = input
|
|
|
builtin_mod_name = "builtins"
|
|
|
|
|
|
str_to_unicode = no_code
|
|
|
unicode_to_str = no_code
|
|
|
str_to_bytes = encode
|
|
|
bytes_to_str = decode
|
|
|
cast_bytes_py2 = no_code
|
|
|
|
|
|
def isidentifier(s, dotted=False):
|
|
|
if dotted:
|
|
|
return all(isidentifier(a) for a in s.split("."))
|
|
|
return s.isidentifier()
|
|
|
|
|
|
open = orig_open
|
|
|
|
|
|
MethodType = types.MethodType
|
|
|
|
|
|
def execfile(fname, glob, loc=None):
|
|
|
loc = loc if (loc is not None) else glob
|
|
|
exec compile(open(fname).read(), fname, 'exec') in glob, loc
|
|
|
|
|
|
else:
|
|
|
PY3 = False
|
|
|
|
|
|
input = raw_input
|
|
|
builtin_mod_name = "__builtin__"
|
|
|
|
|
|
str_to_unicode = decode
|
|
|
unicode_to_str = encode
|
|
|
str_to_bytes = no_code
|
|
|
bytes_to_str = no_code
|
|
|
cast_bytes_py2 = cast_bytes
|
|
|
|
|
|
import re
|
|
|
_name_re = re.compile(r"[a-zA-Z_][a-zA-Z0-9_]*$")
|
|
|
def isidentifier(s, dotted=False):
|
|
|
if dotted:
|
|
|
return all(isidentifier(a) for a in s.split("."))
|
|
|
return bool(_name_re.match(s))
|
|
|
|
|
|
class open(object):
|
|
|
"""Wrapper providing key part of Python 3 open() interface."""
|
|
|
def __init__(self, fname, mode="r", encoding="utf-8"):
|
|
|
self.f = orig_open(fname, mode)
|
|
|
self.enc = encoding
|
|
|
|
|
|
def write(self, s):
|
|
|
return self.f.write(s.encode(self.enc))
|
|
|
|
|
|
def read(self, size=-1):
|
|
|
return self.f.read(size).decode(self.enc)
|
|
|
|
|
|
def close(self):
|
|
|
return self.f.close()
|
|
|
|
|
|
def __enter__(self):
|
|
|
return self
|
|
|
|
|
|
def __exit__(self, etype, value, traceback):
|
|
|
self.f.close()
|
|
|
|
|
|
def MethodType(func, instance):
|
|
|
return types.MethodType(func, instance, type(instance))
|
|
|
|
|
|
# don't override system execfile on 2.x:
|
|
|
execfile = execfile
|
|
|
|
|
|
|
