Inside this module, import random and blackout_utils, and define the following global variable, which you should use whenever appropriate: OPERATIONS = ['^', 'x', '/', '+', '-'] For full marks, all the following functions must be part of this module: calculate(tokens): Takes one list of tokens as input corresponding to a mathematical equation. The function will evaluate both sides of the equality and return a list of three tokens: the result of the left-hand side (integer), the equals sign (string), and the result of the right-hand side (integer). The equation may contain any of the operations in the OPERATIONS list, as well as opening and closing parentheses. Your function should evaluate both sides of the equation while respecting order of operations (that is, parentheses, followed by exponentiation, then multiplication and division, and then addition and subtraction). Equations may have multiple sets of parentheses and nested parentheses. The contents of the inner-most nested parentheses should always be evaluated first. To determine where the inner-most parentheses are in the list of tokens, it can be helpful to find the last opening parenthesis ( in the list, and then find the first closing parenthesis ) that occurs after that point. Then you would evaluate the contents of those parentheses to a single integer, and replace all the tokens between those parentheses, and the two parentheses themselves, by that single integer. If the list of tokens does not correspond to a valid equation (e.g., it has two operations or numbers in a row, or an operation at the start or end of the list), then return the original tokens list without performing any operations. >>> calculate([4, 'x', 2, '=', 9, 'x', 2]) [8, '=', 18]
Inside this module, import random and blackout_utils, and define the following global variable, which you should use whenever appropriate:
OPERATIONS = ['^', 'x', '/', '+', '-']
For full marks, all the following functions must be part of this module:
calculate(tokens): Takes one list of tokens as input corresponding to a mathematical equation. The function will evaluate both sides of the equality and return a list of three tokens: the result of the left-hand side (integer), the equals sign (string), and the result of the right-hand side (integer).
The equation may contain any of the operations in the OPERATIONS list, as well as opening and closing parentheses. Your function should evaluate both sides of the equation while respecting order of operations (that is, parentheses, followed by exponentiation, then multiplication and division, and then addition and subtraction).
Equations may have multiple sets of parentheses and nested parentheses. The contents of the inner-most nested parentheses should always be evaluated first. To determine where the inner-most parentheses are in the list of tokens, it can be helpful to find the last opening parenthesis ( in the list, and then find the first closing parenthesis ) that occurs after that point. Then you would evaluate the contents of those parentheses to a single integer, and replace all the tokens between those parentheses, and the two parentheses themselves, by that single integer.
If the list of tokens does not correspond to a valid equation (e.g., it has two operations or numbers in a row, or an operation at the start or end of the list), then return the original tokens list without performing any operations.
>>> calculate([4, 'x', 2, '=', 9, 'x', 2]) [8, '=', 18]
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