Python 简介(9)

for symbol in symbols] def generate(symbols='S'):  """Replace symbol(s) in the space-delimited input string by a random entry  in grammar (recursively until terminals); join back into a string.""" 

return ' '.join(rewrite(symbols.split())) def generate_tree(symbols='S'):  "Replace symbol(s) in the space-delimited input string by a random entry  in grammar (recursively until terminals);

return a tree."""  return rewrite_tree(symbols.split())

 

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