This Python code generates a straightforward calculator using the tkinter module. The calculator features buttons for each digit and buttons for parentheses, a clear button, and arithmetic operations (+, -, *, and /). The outcome is shown in a Text widget.
Three functions are specified in the code:
- add_to_calc: adds the pressed button's symbol to the calculator's input.
- evaluate_calc: evaluates the calculator's input and displays the result in the Text widget.
- clear_field: clears the calculator's input and the Text widget.
Also, the code generates a tkinter window and specifies its size and title. It generates numerous Button widgets for each digit, mathematical operations, parentheses, clear, and equals, as well as a Text widget to display the outcome.
When a button is pressed, it uses lambda functions to call the associated function, passing the button's symbol as an argument. The button may remember its value when it is pressed because the lambda function records the symbol's value at the time the button is generated.
The tkinter main loop is then executed by the code to show the window and process user input.
Overall, this code serves as a decent illustration of how to utilize the Python tkinter package to build a straightforward calculator with a graphical user interface.
Code :
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Explanation :
This Python program produces a straightforward calculator by utilizing the Tkinter package for graphical user interface development.
Importing the Tkinter module and renaming it to "tk" for ease of use is done in the first line, "import tkinter as tk."
A few functions that will be utilized later in the code are defined in the following few lines.
The "add to calc" function adds a symbol to a global variable "calc" that holds the current computation. The symbol can be an integer or an operator. The "result" Text widget's display is then updated.
The "evaluate calc" function uses Python's built-in "eval" function to evaluate the active calculation in "calc." If the evaluation is successful, it updates "calc" as well as the text widget that displays the results. If there is a mistake, the field is cleared and an error notification is shown.
The global variable "calc" and the display in the "result" Text widget are both cleared by the "clear field" function.
The code then uses "tk.Tk()" to construct the calculator's main window and sets its geometry and title.
It establishes the font and size of a Text widget called "result" that will display the results of the current calculation.
Using the "tk.Button" function Object() { [native code] }, a sequence of Button widgets are generated for the digits 0 through 9 and the operators +, -, *, and /. The "add to calc" function is called with the relevant symbol as an argument by each button assigned to the command, which uses a lambda function to pass the argument without immediately executing it.
In the last step, it constructs Buttons for the parenthesis, the "C" and "=" buttons, and each of those has a different command.
"root.mainloop()" at the end of the code initiates the GUI's main event loop and keeps the window open until it is closed.
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