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To create an integer parser for mathematical operations, we'll need to design a function that can interpret strings representing mathematical expressions involving integers. Here's a step-by-step approach:

1. **Define the Problem**: We need to parse strings that could contain integers and basic arithmetic operations like addition (`+`) and multiplication (`*`).

2. **Basic Tokenization**: Split the string into tokens which can be numbers or operators.

3. **Handling Operations**:
- We'll support addition and multiplication for simplicity.
- Implement operator precedence where multiplication has higher precedence than addition.

4. **Error Handling**: Check for malformed expressions.

5. **Implementation**:

from typing import Union, List def parse_and_compute(expression: str) -> int: """ Parse and compute the result of a mathematical expression string containing integers with '+' for addition and '*' for multiplication. Args: expression (str): A string representing a mathematical operation. Example: "2 + 3 * 4" Returns: int: The result of the mathematical operation. Raises: ValueError: If the expression is invalid or contains unsupported operations. Examples: >>> parse_and_compute("2 + 3 * 4") 14 >>> parse_and_compute("5") 5 >>> parse_and_compute("2 + 2 + 2") 6 """ # Helper function to tokenize the expression def tokenize(expr: str) -> List[Union[str, int]]: tokens = [] current_number = '' for char in expr: if char.isdigit(): current_number += char else: if current_number: tokens.append(int(current_number)) current_number = '' if char.strip(): # Skip spaces but keep operators tokens.append(char) if current_number: # Add the last number if any tokens.append(int(current_number)) return tokens # Helper function to perform operation def apply_operation(a: int, b: int, op: str) -> int: if op == '+': return a + b elif op == '*': return a * b else: raise ValueError(f"Unsupported operation: {op}") tokens = tokenize(expression.replace(" ", "")) # First pass for multiplication to respect operator precedence i = 0 while i < len(tokens): if tokens[i] == '*': left = tokens[i-1] right = tokens[i+1] result = apply_operation(left, right, '*') tokens[i-1:i+2] = [result] # Replace the operation with its result else: i += 1 # Second pass for addition result = tokens[0] for i in range(1, len(tokens), 2): if i + 1 < len(tokens): if tokens[i] != '+': raise ValueError(f"Expected '+', got {tokens[i]}") result = apply_operation(result, tokens[i+1], '+') return result # Test cases try: assert parse_and_compute("2 + 3 * 4") == 14 assert parse_and_compute("5") == 5 assert parse_and_compute("2+2+2") == 6 print("All test cases passed!") except AssertionError: print("Test case failed.")

• • Explanation:**

- **Tokenization:** The `tokenize` function splits the input string into numbers and operators, converting numbers to integers for easier manipulation.

- **Operation Application:**
- Multiplication is handled first to ensure correct operator precedence.
- Addition is then applied from left to right.

- **Error Handling:** The function checks for unsupported operations and raises a `ValueError` when encountered.

- **Type Hints:** Used to clarify what types of data the functions expect and return.

This implementation assumes all numbers are integers and does not handle parentheses or other operations for simplicity. If you need to expand the functionality, you would add more operators, handle parentheses for grouping, or even include negative numbers or decimal points.

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Les boomers me prennent pour un surhomme

C'est normal qu'on lui demande d'écrire le programme en C mais il le fait en python ?

c'est plutot lui qui m'utilise comme intermédiaire tellement il fait tout