def load_grammar(self, *args):
"Load a grammar from a pickle file"
filename = askopenfilename(filetypes=self.GRAMMAR_FILE_TYPES,
defaultextension='.cfg')
if not filename: return
try:
if filename.endswith('.pickle'):
with open(filename, 'rb') as infile:
grammar = pickle.load(infile)
else:
with open(filename, 'r') as infile:
grammar = CFG.fromstring(infile.read())
self.set_grammar(grammar)
except Exception as e:
tkinter.messagebox.showerror('Error Loading Grammar',
'Unable to open file: %r' % filename)
chartparser_app.py 文件源码
python
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