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parsley_math_expression_grammar_add_multiply_integers.py
pythonDefines a simple mathematical expression grammar to add and multiply integers.
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parsley_math_expression_grammar_add_multiply_integers.py
1import parsley
2
3# Define the grammar
4x = parsley.makeGrammar("""
5number = <digit+>:ds -> int(ds)
6expr = expr:left '+' term:right -> left + right
7 | term
8term = term:left '*' factor:right -> left * right
9 | factor
10factor = '(' expr:e ')' -> e
11 | number
12""", {})
13
14# Use the grammar to parse an expression
15result = x("2*(3+4)").expr()
16print(result) # Output: 14