Question: Create a recursive descent parser for boolean formulas in python without import with the following conditions: variables can be a-z ~ will represent not and

Create a recursive descent parser for boolean formulas in python without import with the following conditions:

variables can be a-z

~ will represent not and will be in a unary tree class(nott)

+ will represent and and will be in a binary tree class(andt)

* will represent or and will be in a binary tree class(ort)

formulas may have brackets

example below:

def make_tree("~x + y") returns >>> andt(leaf(nott(x),leaf(y))

picture of tree also attached : https://imgur.com/a/Zpgnz

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

Q:

Your task is to implement a recursive descent parser to recognize and evaluate simple expressions in Python. You will start with the program pluto1.py and extend it to a Pluto 2.0 version that will...

Q:

Your task is to implement a recursive descent parser to recognize and evaluate simple expressions in Python. You will start with the program pluto1.py and extend it to a Pluto 2.0 version that will...

Q:

Briefly describe ASCII and Unicode and draw attention to any relationship between them. [3 marks] (b) Briefly explain what a Reader is in the context of reading characters from data. [3 marks] A...

Q:

In this question assume that p and q are atomic formulae. (a) Compare and contrast path formulae and state formulae in temporal logic. [4 marks] (b) Describe and contrast the meanings of F(G p) and...

Q:

do the following,..... Write program that reads a person's first and last names, separated by a space. Then the program outputs last name, comma, first name. Create program that takes in user input...

Q:

What is the difference between MouseListener and MouseAdapter? [3 marks] (b) Via suitable HTML, the compiled version of the following Java code is presented to the appletviewer application: import...

Q:

Write an alternative definition that is tail-recursive (iterative) and makes use of accumulator variables. [10 marks] Explain why your alternative definition executes more efficiently. [3 marks] 1...

Q:

Let A, B be sets. Define: (a) the Cartesian product (A B) (b) the set of relations R between A and B (c) the identity relation A on the set A [3 marks] Suppose S, T are relations between A and B, and...

Q:

answer the question clearly You are building a flight-control system for which a convincing safety case must be made. Would you assign the tasks of safety requirements engineering, test case...

Q:

Predictive text entry systems are familiar on touch screens and mobile phones. This question asks you to consider how the same principles might be used in a programming editor for creating Java code....

Q:

The citizens of a geographic area of the National City authorized a special assessment to be imposed on their properties to finance the reconstruction of the infrastructure of the sewerage system...

Q:

John and Jane are married. The probability that John watches a certain television show is .4. The probability that Jane watches the show is .5. The probability that John watches the show, given that...

Q:

1 . A company is contemplating a long - term bond issue. The executive committee is debating whether to include a call provision. Briefly explain the rationale for including a call provision. What...

Q:

It is well established that businesses that focus on quality improvement increase their profitability because they seek to satisfy their customers as much as possible. Which of the following...

Q:

=+5. List four of the eight components of a firms plan of action necessary to implement CSR over the short to medium term. What examples from business can you think of where firms have performed...

Q:

=+3. What role do stakeholders play in establishing the level of the CSR threshold for a particular firm or within a particular industry? Think of an example firm and/or industry; what event do you...

Q:

=+2. Why do some firms, industries, and cultures have different CSR thresholds than others? Illustrate your answer with examples for all three categories.