CCITcoder
Contents
Introduction to Python
- Introduction to python
- Features
- General Format
- Datatypes
- Operators
- Multiple Assignments
- Program Input
Conditional statements
Iterative statements
Functions
OOPs
- OOPs
- Object
- Member Functions returning value
- Member Functions Default Argument
- Member Functions Named/Keyword Arguments
- Member Functions *args argument
- Member Functions **kwargs argument
- Constructors
- Constructors default arguments
- Constructors *args argument
- Destructor
- Mutable Methods
Collection
- String
- List
- List Constructor
- Nested List
- Tuple
- Tuple Constructor
- Sets
- Set Operators
- Dictionary
- Map
- Lambda functions
Module and Exception
DateBase
Inherintance
GUI
Contents
Introduction to Python
- Introduction to python
- Features
- General Format
- Datatypes
- Operators
- Multiple Assignments
- Program Input
Conditional statements
Iterative statements
Functions
OOPs
- OOPs
- Object
- Member Functions returning value
- Member Functions Default Argument
- Member Functions Named/Keyword Arguments
- Member Functions *args argument
- Member Functions **kwargs argument
- Constructors
- Constructors default arguments
- Constructors *args argument
- Destructor
- Mutable Methods
Collection
- String
- List
- List Constructor
- Nested List
- Tuple
- Tuple Constructor
- Sets
- Set Operators
- Dictionary
- Map
- Lambda functions
Module and Exception
DateBase
Inherintance
GUI
GUI TKINTER
Class Listbox
- It is used to display a list of items from which a user can select a number of items.
| Constructor | |
|---|---|
| Listbox ( master, **options ) | Constructor |
| Options | |
|---|---|
| bg / fg | background / foreground. |
| bd | border width. Default is 2 pixels. |
| cursor | For ex: arrow , cross , hand etc. |
| font | The font used for the text in the listbox. |
| listvariable | A StringVar that is connected to the complete list of values in the listbox. |
| selectmode |
|
| height | Number of items visible in listbox. Default is 10. |
| relif | Border Style. The default is SUNKEN. |
| width | width in characters. The default is 20. |
| Methods: | |
|---|---|
| insert ( index, *elements ) |
|
| delete ( first, last=None ) | Deletes items from first to last or only single item at specified index. |
| get ( first, last=None ) | Returns a tuple containing the list of all items |
| curselection( ) |
|
| activate ( index ) | Selects the line specifies by the given index. |
#Example
from tkinter import *
from tkinter.messagebox import *
class MyFrame(Tk):
def __init__(self):
super().__init__()
self.lst=Listbox(self,height=5)
self.lst.pack(padx=10,pady=10)
self.lst.insert(0,"Amravati","Nagpur","Mumbai","Pune",
"Nasik","Akola")
self.btn=Button(self,text="Show",command=self.show)
self.btn.pack(fill=X,padx=10,pady=10)
def show(self):
tp=self.lst.curselection()
item=self.lst.get(tp[0])
showinfo(message=item)
frm=MyFrame()
frm.mainloop()
#Example
from tkinter import *
class MyFrame(Tk):
def __init__(self):
super().__init__()
self.data=StringVar()
self.lst=Listbox(self,height=5)
self.lst.pack(padx=10,pady=10)
self.txt=Entry(self,textvariable=self.data)
self.txt.pack(fill=X,padx=10,pady=10)
self.btnx=Button(self,text="Add",command=self.add)
self.btnx.pack(fill=X,padx=10,pady=10)
self.btny=Button(self,text="Delete",command=self. delete)
self.btny.pack(fill=X,padx=10,pady=10)
def add(self):
self.lst.insert(0,self.data.get())
self.data.set("")
def delete(self):
tp=self.lst.curselection()
self.lst.delete(tp[0])
frm=MyFrame()
frm.mainloop()
