def test_load_module_API(self):
# If fullname is not specified that assume self.name is desired.
class TesterMixin(importlib.abc.Loader):
def load_module(self, fullname): return fullname
def module_repr(self, module): return '<module>'
class Tester(importlib.abc.FileLoader, TesterMixin):
def get_code(self, _): pass
def get_source(self, _): pass
def is_package(self, _): pass
name = 'mod_name'
loader = Tester(name, 'some_path')
self.assertEqual(name, loader.load_module())
self.assertEqual(name, loader.load_module(None))
self.assertEqual(name, loader.load_module(name))
with self.assertRaises(ImportError):
loader.load_module(loader.name + 'XXX')
python类abc()的实例源码
def test_get_filename_API(self):
# If fullname is not set then assume self.path is desired.
class Tester(importlib.abc.FileLoader):
def get_code(self, _): pass
def get_source(self, _): pass
def is_package(self, _): pass
def module_repr(self, _): pass
path = 'some_path'
name = 'some_name'
loader = Tester(name, path)
self.assertEqual(path, loader.get_filename(name))
self.assertEqual(path, loader.get_filename())
self.assertEqual(path, loader.get_filename(None))
with self.assertRaises(ImportError):
loader.get_filename(name + 'XXX')
# [basic]
def open_module(self, event=None):
# XXX Shouldn't this be in IOBinding?
try:
name = self.text.get("sel.first", "sel.last")
except TclError:
name = ""
else:
name = name.strip()
name = tkSimpleDialog.askstring("Module",
"Enter the name of a Python module\n"
"to search on sys.path and open:",
parent=self.text, initialvalue=name)
if name:
name = name.strip()
if not name:
return
# XXX Ought to insert current file's directory in front of path
try:
spec = importlib.util.find_spec(name)
except (ValueError, ImportError) as msg:
tkMessageBox.showerror("Import error", str(msg), parent=self.text)
return
if spec is None:
tkMessageBox.showerror("Import error", "module not found",
parent=self.text)
return
if not isinstance(spec.loader, importlib.abc.SourceLoader):
tkMessageBox.showerror("Import error", "not a source-based module",
parent=self.text)
return
try:
file_path = spec.loader.get_filename(name)
except AttributeError:
tkMessageBox.showerror("Import error",
"loader does not support get_filename",
parent=self.text)
return
if self.flist:
self.flist.open(file_path)
else:
self.io.loadfile(file_path)
def open_module(self, event=None):
# XXX Shouldn't this be in IOBinding?
try:
name = self.text.get("sel.first", "sel.last")
except TclError:
name = ""
else:
name = name.strip()
name = tkSimpleDialog.askstring("Module",
"Enter the name of a Python module\n"
"to search on sys.path and open:",
parent=self.text, initialvalue=name)
if name:
name = name.strip()
if not name:
return
# XXX Ought to insert current file's directory in front of path
try:
spec = importlib.util.find_spec(name)
except (ValueError, ImportError) as msg:
tkMessageBox.showerror("Import error", str(msg), parent=self.text)
return
if spec is None:
tkMessageBox.showerror("Import error", "module not found",
parent=self.text)
return
if not isinstance(spec.loader, importlib.abc.SourceLoader):
tkMessageBox.showerror("Import error", "not a source-based module",
parent=self.text)
return
try:
file_path = spec.loader.get_filename(name)
except AttributeError:
tkMessageBox.showerror("Import error",
"loader does not support get_filename",
parent=self.text)
return
if self.flist:
self.flist.open(file_path)
else:
self.io.loadfile(file_path)
return file_path
