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How to use the asttokens.AssignFirstTokens.visit_tree function in asttokens

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gristlabs / asttokens / asttokens.py View on Github

def mark_tokens(self, root_node):
    """
    Given the root of the AST tree produced from source_text, visits all nodes marking them with
    token and position information by adding .first_token and .last_token attributes.
    """
    AssignFirstTokens(self).visit_tree(root_node)
    AssignLastTokens(self).visit_tree(root_node)