forked from s444420/AL-2020
68 lines
2.2 KiB
Python
68 lines
2.2 KiB
Python
|
"""
|
||
|
|
pkgdata is a simple, extensible way for a package to acquire data file
|
||
|
|
resources.
|
||
|
|
|
||
|
|
The getResource function is equivalent to the standard idioms, such as
|
||
|
|
the following minimal implementation:
|
||
|
|
|
||
|
|
import sys, os
|
||
|
|
|
||
|
|
def getResource(identifier, pkgname=__name__):
|
||
|
|
pkgpath = os.path.dirname(sys.modules[pkgname].__file__)
|
||
|
|
path = os.path.join(pkgpath, identifier)
|
||
|
|
return file(os.path.normpath(path), mode='rb')
|
||
|
|
|
||
|
|
When a __loader__ is present on the module given by __name__, it will defer
|
||
|
|
getResource to its get_data implementation and return it as a file-like
|
||
|
|
object (such as StringIO).
|
||
|
|
"""
|
||
|
|
|
||
|
|
__all__ = ['getResource']
|
||
|
|
import sys
|
||
|
|
import os
|
||
|
|
from pygame.compat import get_BytesIO
|
||
|
|
BytesIO = get_BytesIO()
|
||
|
|
|
||
|
|
try:
|
||
|
|
from pkg_resources import resource_stream, resource_exists
|
||
|
|
except ImportError:
|
||
|
|
def resource_exists(package_or_requirement, resource_name):
|
||
|
|
return False
|
||
|
|
def resource_stream(package_of_requirement, resource_name):
|
||
|
|
raise NotImplementedError
|
||
|
|
|
||
|
|
def getResource(identifier, pkgname=__name__):
|
||
|
|
"""
|
||
|
|
Acquire a readable object for a given package name and identifier.
|
||
|
|
An IOError will be raised if the resource can not be found.
|
||
|
|
|
||
|
|
For example:
|
||
|
|
mydata = getResource('mypkgdata.jpg').read()
|
||
|
|
|
||
|
|
Note that the package name must be fully qualified, if given, such
|
||
|
|
that it would be found in sys.modules.
|
||
|
|
|
||
|
|
In some cases, getResource will return a real file object. In that
|
||
|
|
case, it may be useful to use its name attribute to get the path
|
||
|
|
rather than use it as a file-like object. For example, you may
|
||
|
|
be handing data off to a C API.
|
||
|
|
"""
|
||
|
|
if resource_exists(pkgname, identifier):
|
||
|
|
return resource_stream(pkgname, identifier)
|
||
|
|
|
||
|
|
mod = sys.modules[pkgname]
|
||
|
|
fn = getattr(mod, '__file__', None)
|
||
|
|
if fn is None:
|
||
|
|
raise IOError("%s has no __file__!" % repr(mod))
|
||
|
|
path = os.path.join(os.path.dirname(fn), identifier)
|
||
|
|
if sys.version_info < (3, 3):
|
||
|
|
loader = getattr(mod, '__loader__', None)
|
||
|
|
if loader is not None:
|
||
|
|
try:
|
||
|
|
data = loader.get_data(path)
|
||
|
|
except IOError:
|
||
|
|
pass
|
||
|
|
else:
|
||
|
|
return BytesIO(data)
|
||
|
|
return open(os.path.normpath(path), 'rb')
|