Cara menggunakan python filter complexity

Conclusion

According to test cases, there is nothing wrong with using high-order functions when we do NOT need to chain them. The performance is way better (1.63x faster) when we use built-in map function or slightly better/worse when we use built-in filter/reduce.

If we want to chain high-order functions we should consider not using them and implementing them as a for-in loop solution. The performance is way better, 2.37x faster (in examples of this article) than built-in functions.

There is no need to always use modern elements, structures, or functions of a modern language just because the syntax looks better or everyone uses it. Time and space complexity is way more important than modern syntax and in the end, the fancy syntax does not make us better developers, even though we might think it does.

Python provides a variety of GUI (Graphic User Interface) types such as PyQT, Tkinter, Kivy, WxPython, and PySide. Among them, tkinter is the most commonly used GUI module in Python since it is simple and easy to understand. The word Tkinter comes from the Tk interface. The tkinter module is available in Python standard library which has to be imported while writing a program in Python to generate a GUI.

Note: Tkinter(capital T) is different from the tkinter. Tkinter is used in Python2.x and is changed to tkinter in Python.3x.

Combobox is a combination of Listbox and an entry field. It is one of the Tkinter widgets where it contains a down arrow to select from a list of options. It helps the users to select according to the list of options displayed. When the user clicks on the drop-down arrow on the entry field, a pop up of the scrolled Listbox is displayed down the entry field. The selected option will be displayed in the entry field only when an option from the Listbox is selected.

Syntax:

combobox = ttk.Combobox(master, option=value, ...)

Example 1: Combobox widget without setting a default value.

# python program demonstrating

# Combobox widget using tkinter

import tkinter as tk

from tkinterimport tkinter1

tkinter3

tkinter4tkinter5 tkinter6

tkinter7tkinter8tkinter9

# python program demonstrating0# python program demonstrating1tkinter9

# python program demonstrating4

# python program demonstrating5tkinter5 # python program demonstrating7# python program demonstrating8

# python program demonstrating9# Combobox widget using tkinter0tkinter5 # Combobox widget using tkinter2# Combobox widget using tkinter3tkinter5# Combobox widget using tkinter5# python program demonstrating8

# python program demonstrating9# Combobox widget using tkinter8tkinter5  0 1 2 3 4tkinter5  6 7tkinter5  9tkinter9

 2

# python program demonstrating5tkinter5  5 2

# python program demonstrating9# Combobox widget using tkinter8tkinter5  0 1 2import3import4tkinter5  6 2

# python program demonstrating9import9tkinter5 tkinter as tk1tkinter as tk2tkinter5 import3tkinter as tk5tkinter5 tkinter as tk7tkinter9

from0

from1tkinter5 from3

from4tkinter5 from6tkinter5 from8from9tkinter5 tkinter1

tkinter3

tkinter4tkinter5tkinter6tkinter5  0tkinter9# python program demonstrating8

tkinter01tkinter02 2

tkinter01tkinter05 2

tkinter01tkinter08 2

tkinter01tkinter11 2

tkinter01tkinter14 2

tkinter01tkinter17 2

tkinter01tkinter20 2

tkinter01tkinter23 2

tkinter01tkinter26 2

tkinter01tkinter29 2

tkinter01tkinter32tkinter9

tkinter35tkinter5  9tkinter38tkinter5 tkinter as tk1tkinter9

tkinter42

tkinter43

Output:

Example 2: Combobox with initial default values.
We can also set the initial default values in the Combobox widget as shown in the below sample code.

import tkinter as tk

from tkinterimport tkinter1

tkinter3

tkinter4tkinter5 tkinter6

# python program demonstrating0tkinter56tkinter9

tkinter58

# python program demonstrating5tkinter5  5# python program demonstrating8

tkinter63# Combobox widget using tkinter8tkinter5  0 1 2import3import4tkinter5  6# python program demonstrating8

tkinter63import9tkinter5  3tkinter as tk2tkinter5 import3tkinter as tk5tkinter5 tkinter as tk7tkinter9