Simplify PythonParser, make inlined primitive rules that used only one time, use alternative labels for stmt rules, reorder some rules for clarity
Simplify PythonParser, make inlined primitive rules that used only one time, use alternative labels for stmt rules, reorder some rules for clarity

antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4