This Python function, arithmetic_arranger, takes a list of arithmetic problems as strings and arranges them vertically, as if they were written on an arithmetic worksheet. It supports addition and subtraction only and handles basic error checking.
def arithmetic_arranger(problems, show_answers=False):
# ... (function code as provided) ...
The function takes two arguments:
problems: A list of strings representing the arithmetic problems. Each problem should be in the format "operand1 operator operand2", where operand1 and operand2 are integers and operator is either "+" or "-".
show_answers (optional): A boolean value. If True, the function will also display the answers to the problems. Defaults to False.
Example Usage
print(arithmetic_arranger(["3801 - 2", "123 + 49"]))
# Output:
# 3801 123
# - 2 + 49
# ------ -----
print(arithmetic_arranger(["32 + 698", "3801 - 2", "45 + 43", "123 + 49"], True))
# Output:
# 32 3801 45 123
# + 698 - 2 + 43 + 49
# ----- ------ ---- -----
# 730 3799 88 172
Error Handling
The function includes error handling for the following cases:
Too many problems: If the input list problems contains more than 5 problems, the function returns the string 'Error: Too many problems.'.
Invalid operator: If a problem contains an operator other than "+" or "-", the function returns the string "Error: Operator must be '+' or '-'.".
Non-digit operands: If an operand in a problem is not a valid integer (contains non-digit characters), the function returns the string 'Error: Numbers must only contain digits.'.
Operands with more than four digits: If an operand in a problem has more than four digits, the function returns the string 'Error: Numbers cannot be more than four digits.'.
Function Details
The function works by:
Parsing the problems: It splits each problem string into its operands and operator.
Validating the input: It checks for the errors mentioned above.
Calculating the answers: It calculates the result of each operation.
Arranging the problems: It formats the problems vertically, aligning the operands and adding dashes.
Returning the formatted string: It returns the arranged problems as a single string, with newlines separating the rows.
Testing
The code includes several example calls to arithmetic_arranger with different inputs to demonstrate its functionality and error handling. You can uncomment these calls to test the function yourself.
## Note
Contributing
Contributions are welcome! If you find any bugs or have suggestions for improvements of this project, please open an issue or submit a pull 1 request.
Thank you!