Coverage for /usr/lib/python3/dist-packages/numpy/compat/py3k.py : 43%

""" 

Python 3 compatibility tools. 

""" 

from __future__ import division, absolute_import, print_function 

__all__ = ['bytes', 'asbytes', 'isfileobj', 'getexception', 'strchar', 

'unicode', 'asunicode', 'asbytes_nested', 'asunicode_nested', 

'asstr', 'open_latin1', 'long', 'basestring', 'sixu', 

'integer_types', 'is_pathlib_path', 'npy_load_module', 'Path', 

'contextlib_nullcontext', 'os_fspath', 'os_PathLike'] 

import sys 

try: 

from pathlib import Path, PurePath 

except ImportError: 

Path = PurePath = None 

if sys.version_info[0] >= 3: 

import io 

long = int 

integer_types = (int,) 

basestring = str 

unicode = str 

bytes = bytes 

def asunicode(s): 

if isinstance(s, bytes): 

return s.decode('latin1') 

return str(s) 

def asbytes(s): 

if isinstance(s, bytes): 

return s 

return str(s).encode('latin1') 

def asstr(s): 

if isinstance(s, bytes): 

return s.decode('latin1') 

return str(s) 

def isfileobj(f): 

return isinstance(f, (io.FileIO, io.BufferedReader, io.BufferedWriter)) 

def open_latin1(filename, mode='r'): 

return open(filename, mode=mode, encoding='iso-8859-1') 

def sixu(s): 

return s 

strchar = 'U' 

else: 

bytes = str 

long = long 

basestring = basestring 

unicode = unicode 

integer_types = (int, long) 

asbytes = str 

asstr = str 

strchar = 'S' 

def isfileobj(f): 

return isinstance(f, file) 

def asunicode(s): 

if isinstance(s, unicode): 

return s 

return str(s).decode('ascii') 

def open_latin1(filename, mode='r'): 

return open(filename, mode=mode) 

def sixu(s): 

return unicode(s, 'unicode_escape') 

def getexception(): 

return sys.exc_info()[1] 

def asbytes_nested(x): 

if hasattr(x, '__iter__') and not isinstance(x, (bytes, unicode)): 

return [asbytes_nested(y) for y in x] 

else: 

return asbytes(x) 

def asunicode_nested(x): 

if hasattr(x, '__iter__') and not isinstance(x, (bytes, unicode)): 

return [asunicode_nested(y) for y in x] 

else: 

return asunicode(x) 

def is_pathlib_path(obj): 

""" 

Check whether obj is a pathlib.Path object. 

Prefer using `isinstance(obj, os_PathLike)` instead of this function. 

""" 

return Path is not None and isinstance(obj, Path) 

# from Python 3.7 

class contextlib_nullcontext(object): 

"""Context manager that does no additional processing. 

Used as a stand-in for a normal context manager, when a particular 

block of code is only sometimes used with a normal context manager: 

cm = optional_cm if condition else nullcontext() 

with cm: 

# Perform operation, using optional_cm if condition is True 

""" 

def __init__(self, enter_result=None): 

self.enter_result = enter_result 

def __enter__(self): 

return self.enter_result 

def __exit__(self, *excinfo): 

pass 

if sys.version_info[0] >= 3 and sys.version_info[1] >= 4: 

def npy_load_module(name, fn, info=None): 

""" 

Load a module. 

.. versionadded:: 1.11.2 

Parameters 

---------- 

name : str 

Full module name. 

fn : str 

Path to module file. 

info : tuple, optional 

Only here for backward compatibility with Python 2.*. 

Returns 

------- 

mod : module 

""" 

import importlib.machinery 

return importlib.machinery.SourceFileLoader(name, fn).load_module() 

else: 

def npy_load_module(name, fn, info=None): 

""" 

Load a module. 

.. versionadded:: 1.11.2 

Parameters 

---------- 

name : str 

Full module name. 

fn : str 

Path to module file. 

info : tuple, optional 

Information as returned by `imp.find_module` 

(suffix, mode, type). 

Returns 

------- 

mod : module 

""" 

import imp 

import os 

if info is None: 

path = os.path.dirname(fn) 

fo, fn, info = imp.find_module(name, [path]) 

else: 

fo = open(fn, info[1]) 

try: 

mod = imp.load_module(name, fo, fn, info) 

finally: 

fo.close() 

return mod 

# backport abc.ABC 

import abc 

if sys.version_info[:2] >= (3, 4): 

abc_ABC = abc.ABC 

else: 

abc_ABC = abc.ABCMeta('ABC', (object,), {'__slots__': ()}) 

# Backport os.fs_path, os.PathLike, and PurePath.__fspath__ 

if sys.version_info[:2] >= (3, 6): 

import os 

os_fspath = os.fspath 

os_PathLike = os.PathLike 

else: 

def _PurePath__fspath__(self): 

return str(self) 

class os_PathLike(abc_ABC): 

"""Abstract base class for implementing the file system path protocol.""" 

@abc.abstractmethod 

def __fspath__(self): 

"""Return the file system path representation of the object.""" 

raise NotImplementedError 

@classmethod 

def __subclasshook__(cls, subclass): 

if PurePath is not None and issubclass(subclass, PurePath): 

return True 

return hasattr(subclass, '__fspath__') 

def os_fspath(path): 

"""Return the path representation of a path-like object. 

If str or bytes is passed in, it is returned unchanged. Otherwise the 

os.PathLike interface is used to get the path representation. If the 

path representation is not str or bytes, TypeError is raised. If the 

provided path is not str, bytes, or os.PathLike, TypeError is raised. 

""" 

if isinstance(path, (unicode, bytes)): 

return path 

# Work from the object's type to match method resolution of other magic 

# methods. 

path_type = type(path) 

try: 

path_repr = path_type.__fspath__(path) 

except AttributeError: 

if hasattr(path_type, '__fspath__'): 

raise 

elif PurePath is not None and issubclass(path_type, PurePath): 

return _PurePath__fspath__(path) 

else: 

raise TypeError("expected str, bytes or os.PathLike object, " 

"not " + path_type.__name__) 

if isinstance(path_repr, (unicode, bytes)): 

return path_repr 

else: 

raise TypeError("expected {}.__fspath__() to return str or bytes, " 

"not {}".format(path_type.__name__, 

type(path_repr).__name__))