types-antlr4-python3-runtime

import os from antlr4 import InputStream, CommonTokenStream, ParseTreeWalker # --- Example: Assumes MyGrammar.g4 was compiled to MyGrammarLexer.py and MyGrammarParser.py --- # To generate these files, you need the ANTLR Java tool (antlr-VERSION-complete.jar): # java -jar /path/to/antlr-VERSION-complete.jar MyGrammar.g4 -Dlanguage=Python3 # Placeholder for generated classes (replace with actual generated imports) # For a real scenario, these would be in files like MyGrammarLexer.py and MyGrammarParser.py class MyGrammarLexer: def __init__(self, input_stream): pass # Simplified for quickstart def getAllTokens(self): return [] # Simplified class MyGrammarParser: def __init__(self, token_stream): pass # Simplified def myRule(self): class Context: def accept(self, visitor): pass def toStringTree(self, recog=None): return "(myRule)" return Context() # Simplified class MyGrammarListener: def enterMyRule(self, ctx): pass def exitMyRule(self, ctx): pass # Example usage of the antlr4-python3-runtime with generated classes input_text = "hello world" input_stream = InputStream(input_text) lexer = MyGrammarLexer(input_stream) token_stream = CommonTokenStream(lexer) parser = MyGrammarParser(token_stream) # Assume 'myRule' is the entry point for your grammar tree = parser.myRule() print(f"Parsed tree: {tree.toStringTree(recog=parser)}") # Using a listener for tree traversal listener = MyGrammarListener() walker = ParseTreeWalker() walker.walk(listener, tree) print("Type checking enabled for antlr4 classes by types-antlr4-python3-runtime.")