Python imp.NullImporter方法代碼示例

# 需要導入模塊: import imp [as 別名]
# 或者: from imp import NullImporter [as 別名]
def test_pythontypes(self):
        # check all types defined in Python/
        size = test.test_support.calcobjsize
        vsize = test.test_support.calcvobjsize
        check = self.check_sizeof
        # _ast.AST
        import _ast
        check(_ast.AST(), size(''))
        # imp.NullImporter
        import imp
        check(imp.NullImporter(self.file.name), size(''))
        try:
            raise TypeError
        except TypeError:
            tb = sys.exc_info()[2]
            # traceback
            if tb != None:
                check(tb, size('2P2i'))
        # symtable entry
        # XXX
        # sys.flags
        check(sys.flags, vsize('') + self.P * len(sys.flags)) 

# 需要導入模塊: import imp [as 別名]
# 或者: from imp import NullImporter [as 別名]
def _get_importer(path_name):
    """Python version of PyImport_GetImporter C API function"""
    cache = sys.path_importer_cache
    try:
        importer = cache[path_name]
    except KeyError:
        # Not yet cached. Flag as using the
        # standard machinery until we finish
        # checking the hooks
        cache[path_name] = None
        for hook in sys.path_hooks:
            try:
                importer = hook(path_name)
                break
            except ImportError:
                pass
        else:
            # The following check looks a bit odd. The trick is that
            # NullImporter throws ImportError if the supplied path is a
            # *valid* directory entry (and hence able to be handled
            # by the standard import machinery)
            try:
                importer = imp.NullImporter(path_name)
            except ImportError:
                return None
        cache[path_name] = importer
    return importer 

# 需要導入模塊: import imp [as 別名]
# 或者: from imp import NullImporter [as 別名]
def _get_importer(path_name):
    """Python version of PyImport_GetImporter C API function"""
    cache = sys.path_importer_cache
    try:
        importer = cache[path_name]
    except KeyError:
        # Not yet cached. Flag as using the
        # standard machinery until we finish
        # checking the hooks
        cache[path_name] = None
        for hook in sys.path_hooks:
            try:
                importer = hook(path_name)
                break
            except ImportError:
                pass
        else:
            # The following check looks a bit odd. The trick is that
            # NullImporter raises ImportError if the supplied path is a
            # *valid* directory entry (and hence able to be handled
            # by the standard import machinery)
            try:
                importer = imp.NullImporter(path_name)
            except ImportError:
                return None
        cache[path_name] = importer
    return importer 

# 需要導入模塊: import imp [as 別名]
# 或者: from imp import NullImporter [as 別名]
def test_pythontypes(self):
        # check all types defined in Python/
        size = test.test_support.calcobjsize
        vsize = test.test_support.calcvobjsize
        check = self.check_sizeof
        # _ast.AST
        import _ast
        check(_ast.AST(), size(''))
        # imp.NullImporter
        import imp
        f = open(test.test_support.TESTFN, 'wb')
        try:
            check(imp.NullImporter(f.name), size(''))
        finally:
            f.close()
            test.test_support.unlink(test.test_support.TESTFN)
        try:
            raise TypeError
        except TypeError:
            tb = sys.exc_info()[2]
            # traceback
            if tb != None:
                check(tb, size('2P2i'))
        # symtable entry
        # XXX
        # sys.flags
        check(sys.flags, vsize('') + self.P * len(sys.flags)) 

# 需要導入模塊: import imp [as 別名]
# 或者: from imp import NullImporter [as 別名]
def test_NullImporter(self):
        def f():
            class x(imp.NullImporter): pass
            
        self.assertRaises(TypeError, f)
        
        self.assertEqual(imp.NullImporter.__module__, 'imp')
        
        sys.path.append('directory_that_does_not_exist')
        try:
            import SomeFileThatDoesNotExist
        except ImportError:
            pass
            
        self.assertTrue(isinstance(sys.path_importer_cache['directory_that_does_not_exist'], imp.NullImporter)) 

# 需要導入模塊: import imp [as 別名]
# 或者: from imp import NullImporter [as 別名]
def test_unencodeable(self):
        name = support.TESTFN_UNENCODABLE
        os.mkdir(name)
        try:
            self.assertRaises(ImportError, imp.NullImporter, name)
        finally:
            os.rmdir(name) 

# 需要導入模塊: import imp [as 別名]
# 或者: from imp import NullImporter [as 別名]
def test_pythontypes(self):
        # check all types defined in Python/
        size = test.test_support.calcobjsize
        vsize = test.test_support.calcvobjsize
        check = self.check_sizeof
        # imp.NullImporter
        import imp
        check(imp.NullImporter(self.file.name), size('3P'))
        try:
            raise TypeError
        except TypeError:
            tb = sys.exc_info()[2]
            # traceback
            if tb != None:
                check(tb, size('2P2i')) 

# 需要導入模塊: import imp [as 別名]
# 或者: from imp import NullImporter [as 別名]
def run_path(path_name, init_globals=None, run_name=None):
    """Execute code located at the specified filesystem location

       Returns the resulting top level namespace dictionary

       The file path may refer directly to a Python script (i.e.
       one that could be directly executed with execfile) or else
       it may refer to a zipfile or directory containing a top
       level __main__.py script.
    """
    if run_name is None:
        run_name = "<run_path>"
    importer = _get_importer(path_name)
    if isinstance(importer, imp.NullImporter):
        # Not a valid sys.path entry, so run the code directly
        # execfile() doesn't help as we want to allow compiled files
        code = _get_code_from_file(path_name)
        return _run_module_code(code, init_globals, run_name, path_name)
    else:
        # Importer is defined for path, so add it to
        # the start of sys.path
        sys.path.insert(0, path_name)
        try:
            # Here's where things are a little different from the run_module
            # case. There, we only had to replace the module in sys while the
            # code was running and doing so was somewhat optional. Here, we
            # have no choice and we have to remove it even while we read the
            # code. If we don't do this, a __loader__ attribute in the
            # existing __main__ module may prevent location of the new module.
            main_name = "__main__"
            saved_main = sys.modules[main_name]
            del sys.modules[main_name]
            try:
                mod_name, loader, code, fname = _get_main_module_details()
            finally:
                sys.modules[main_name] = saved_main
            pkg_name = ""
            with _TempModule(run_name) as temp_module, \
                 _ModifiedArgv0(path_name):
                mod_globals = temp_module.module.__dict__
                return _run_code(code, mod_globals, init_globals,
                                    run_name, fname, loader, pkg_name).copy()
        finally:
            try:
                sys.path.remove(path_name)
            except ValueError:
                pass 

# 需要導入模塊: import imp [as 別名]
# 或者: from imp import NullImporter [as 別名]
def run_path(path_name, init_globals=None, run_name=None):
    """Execute code located at the specified filesystem location

       Returns the resulting top level namespace dictionary

       The file path may refer directly to a Python script (i.e.
       one that could be directly executed with execfile) or else
       it may refer to a zipfile or directory containing a top
       level __main__.py script.
    """
    if run_name is None:
        run_name = "<run_path>"
    importer = _get_importer(path_name)
    if isinstance(importer, imp.NullImporter):
        # Not a valid sys.path entry, so run the code directly
        # execfile() doesn't help as we want to allow compiled files
        code = _get_code_from_file(path_name)
        return _run_module_code(code, init_globals, run_name, path_name)
    else:
        # Importer is defined for path, so add it to
        # the start of sys.path
        sys.path.insert(0, path_name)
        try:
            # Here's where things are a little different from the run_module
            # case. There, we only had to replace the module in sys while the
            # code was running and doing so was somewhat optional. Here, we
            # have no choice and we have to remove it even while we read the
            # code. If we don't do this, a __loader__ attribute in the
            # existing __main__ module may prevent location of the new module.
            main_name = "__main__"
            saved_main = sys.modules[main_name]
            del sys.modules[main_name]
            try:
                mod_name, loader, code, fname = _get_main_module_details()
            finally:
                sys.modules[main_name] = saved_main
            pkg_name = ""
            with _ModifiedArgv0(path_name):
                with _TempModule(run_name) as temp_module:
                    mod_globals = temp_module.module.__dict__
                    return _run_code(code, mod_globals, init_globals,
                                        run_name, fname, loader, pkg_name).copy()
        finally:
            try:
                sys.path.remove(path_name)
            except ValueError:
                pass