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Merge pull request #749 from ca20110820/computer-algebra
Feature: Computer Algebra
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‎projects/computer-algebra/README.md‎

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# Newton CAS Python Wrapper and GUI
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This project aims to provide a Python wrapper and GUI for the Newton API, a Computer Algebra
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System (CAS) that allows users to perform various mathematical computations. The GUI is built using
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[DearPyGui](https://github.com/hoffstadt/DearPyGui) and
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[Newton API](https://github.com/aunyks/newton-api).
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## Features
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- **User-Friendly Interface:** The GUI provides an intuitive interface for users to interact with the Newton API
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effortlessly.
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- **Multiple Mathematical Operations:** Users can perform a variety of mathematical operations such as simplification,
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factoring, differentiation, integration, finding zeroes, and more.
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- **Real-Time Evaluation:** Expressions are evaluated in real-time, providing instant feedback to users.
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## Installation
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1. Clone the repository:
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```bash
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git clone https://github.com/Mrinank-Bhowmick/python-beginner-projects.git
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```
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2. Navigate to the project directory:
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```bash
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cd python-beginner-projects/projects/computer-algebra
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```
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3. Install dependencies using pip:
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```bash
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pip install -r requirements.txt
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```
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## Usage
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1. Run the main script `main.py`:
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```bash
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python main.py
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```
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2. The application window will appear, consisting of two sections:
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- **Input Section:** Enter the mathematical expression you want to evaluate.
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- **Output Section:** View the result of the evaluation.
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3. Choose the desired mathematical operation from the radio buttons.
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4. Enter the expression in the input text box.
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- See valid syntax from [Newton API](https://github.com/aunyks/newton-api).
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5. Click the "Evaluate" button to perform the selected operation.
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6. The result will be displayed in the output section.
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## Contact
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[GitHub Profile](https://github.com/ca20110820)
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## License
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[![License](https://img.shields.io/static/v1?label=Licence&message=GPL-3-0&color=blue)](https://opensource.org/license/GPL-3-0)

‎projects/computer-algebra/command.py‎

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from typing import Any
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from abc import abstractmethod, ABC
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from urllib.parse import quote
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class CmdBase(ABC):
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"""Base class for all the CAS (Computer Algebra System) API Commands."""
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def __init__(self, operation: str, base_url: str):
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self.operation = operation
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self.base_url = base_url
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@abstractmethod
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def command(self, expr: str) -> Any:
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"""
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Command for sending request to Newton CAS API with a given expression string and returns the result from
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the API response.
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"""
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pass
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@staticmethod
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def url_encode(inp_str: str) -> str:
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"""Encode the input string to a URL-safe format."""
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return quote(inp_str)

‎projects/computer-algebra/main.py‎

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from newton_command import NEWTON_CMDS_DICT
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import dearpygui.dearpygui as dpg
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def selection_cb(sender, app_data, user_data):
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"""Callback function for button selections in the message box."""
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if user_data[1]:
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print("User selected 'Ok'")
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else:
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print("User selected 'Cancel'")
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# delete window
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dpg.delete_item(user_data[0])
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def show_info(title, message, selection_callback):
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"""
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Display an information message box with title, message, and callback.
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References:
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https://github.com/hoffstadt/DearPyGui/discussions/1002
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"""
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# guarantee these commands happen in the same frame
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with dpg.mutex():
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viewport_width = dpg.get_viewport_client_width()
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viewport_height = dpg.get_viewport_client_height()
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with dpg.window(tag='popup-window', label=title, modal=True, no_close=True) as modal_id:
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dpg.add_text(message)
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dpg.add_button(label="Ok", width=75, user_data=(modal_id, True), callback=selection_callback)
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dpg.add_same_line()
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dpg.add_button(label="Cancel", width=75, user_data=(modal_id, False), callback=selection_callback)
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# guarantee these commands happen in another frame
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dpg.split_frame()
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width = dpg.get_item_width(modal_id)
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height = dpg.get_item_height(modal_id)
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dpg.set_item_pos(modal_id, [viewport_width // 2 - width // 2, viewport_height // 2 - height // 2])
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# Callbacks and Helpers
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def on_evaluate(sender, app_data, user_data):
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"""Callback function for the 'Evaluate' button."""
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# Get the Command
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cmd = dpg.get_value('radio-cmds')
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cmd_func = NEWTON_CMDS_DICT[cmd]
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# Get the Expression
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expr = dpg.get_value('inp-expr')
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if expr.strip() in ['']:
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show_info(
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'Error',
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'Please use valid mathematical expressions.',
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selection_cb
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)
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# Clear Expression
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dpg.set_value('inp-expr', '')
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return
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# Evaluate
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response = cmd_func(expr)
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result = response.result
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dpg.set_value('label-output', result)
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dpg.create_context()
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dpg.create_viewport(title='Computer Algebra', width=1300, height=750)
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with dpg.window(tag='inp-window',
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label="Input",
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pos=[0, 0],
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autosize=True,
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# width=1150,
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# height=350,
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no_collapse=True,
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no_close=True,
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):
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# Radio Button for Commands
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dpg.add_radio_button(
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horizontal=True,
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tag='radio-cmds',
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items=[cmd for cmd in NEWTON_CMDS_DICT.keys()]
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)
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# Text Area for Mathematical Expression
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dpg.add_input_text(
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tag='inp-expr',
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width=int(1150 * 0.8),
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)
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# Button for Evaluating Command and Expression
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dpg.add_button(label="Evaluate", callback=on_evaluate)
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with dpg.window(tag='out-window',
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pos=[0, 100],
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label="Output",
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# width=700,
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# height=350,
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autosize=True,
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no_collapse=True,
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no_close=True,
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):
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# Use Label for Output
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dpg.add_text(tag='label-output',
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label='Result',
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show_label=True,
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)
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dpg.setup_dearpygui()
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dpg.show_viewport()
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dpg.start_dearpygui()
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dpg.destroy_context()

‎projects/computer-algebra/newton_command.py‎

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from dataclasses import dataclass
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import requests
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from command import CmdBase
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@dataclass(frozen=True)
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class NewtonResponse:
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"""Newton API Response."""
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operation: str
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expression: str
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result: str
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class NewtonCmdException(Exception):
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"""Base class for Newton Command Exceptions."""
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class NewtonCommand(CmdBase):
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"""Base class for all the Newton API Commands."""
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def __init__(self, operation: str):
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super().__init__(operation, 'https://newton.now.sh/api/v2')
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def command(self, expr: str) -> NewtonResponse:
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"""
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Command method for NewtonCommand class.
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Args:
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expr (str): Mathematical expression to be evaluated.
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Returns:
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NewtonResponse: Object containing the operation, expression, and result of the evaluated expression.
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Raises:
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NewtonCmdException: If the HTTP request fails or returns a non-success status code, the exception is raised
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with the error message.
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"""
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# Construct the Request URL
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expr_encode = self.url_encode(expr) # URL Encode for Expression
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request_url = f"{self.base_url}/{self.operation}/{expr_encode}"
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# Make the HTTP GET request
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response = requests.get(request_url)
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# Check if the request was successful (status code 200)
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if response.status_code == 200:
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# Deserialize the JSON response into a dictionary
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response_data = response.json()
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# Extract relevant data from the response
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operation = response_data['operation']
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expression = response_data['expression']
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result = response_data['result']
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# Create and return a NewtonResponse object
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return NewtonResponse(operation=operation, expression=expression, result=result)
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else:
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raise NewtonCmdException(f'{response.text}')
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newton_simplify = NewtonCommand('simplify').command
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newton_factor = NewtonCommand('factor').command
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newton_derive = NewtonCommand('derive').command
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newton_integrate = NewtonCommand('integrate').command
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newton_zeroes = NewtonCommand('zeroes').command
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newton_tangent = NewtonCommand('tangent').command
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newton_area = NewtonCommand('area').command
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newton_cos = NewtonCommand('cos').command
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newton_sin = NewtonCommand('sin').command
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newton_tan = NewtonCommand('tan').command
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newton_arc_cos = NewtonCommand('arccos').command
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newton_arc_sin = NewtonCommand('arcsin').command
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newton_arc_tan = NewtonCommand('arctan').command
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newton_abs = NewtonCommand('abs').command
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newton_log = NewtonCommand('log').command
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NEWTON_CMDS_DICT = {
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'simplify': newton_simplify,
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'factor': newton_factor,
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'derive': newton_derive,
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'integrate': newton_integrate,
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'zeroes': newton_zeroes,
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'tangent': newton_tangent,
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'area': newton_area,
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'cos': newton_cos,
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'sin': newton_sin,
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'tan': newton_tan,
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'arccos': newton_arc_cos,
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'arcsin': newton_arc_sin,
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'arctan': newton_arc_tan,
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'abs': newton_abs,
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'log': newton_log
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}

‎projects/computer-algebra/requirements.txt‎

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requests==2.31.0
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dearpygui==1.11.1

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