Python GUI Tkinter widgets

 List of widgets in Tkinter

askopenfile	Dialog box to show file browser & upload file from local system
askopenfile	Upload and display images using file browser
Button	Add button with click events and style
Canvas	Draw Line, Arc, Oval, Polygon ,rectangle etc
Checkbutton	Read data and manage (set or get) of a checkbutton
Combobox	Managing options of a dropdown Combobox
colors	Tkinter supported colors list
colorchooser	access the native colour picker dialog
config()	access the access the object's attributes after its initialization
Entry	Add Text box , Single line text entry
Events	Mouse and Keyboard Events using Call back functions
frame	Group widgets and add separator to window
image	Displaying icon and Images on Window
Label	Add Label and change text & other attributes
LabelFrame	Group Widgets and add Label
Listbox	Read selection , add elements to a listbox
MessageBox	Show Message box and take user choice
Menu	Menu with option and methods
Notebook	Methods and options to manage Tabs
OptionMenu	Drop down box to select one of many options
PanedWindow	Container allowing user to adjust the size by using the mouse
Progressbar	Displaying status of process with options and methods
Radiobutton	Read data and manage (set or get) of a Radio button
Scale	Use slider to fix value
Scrollbar	Scrollbar options and uses
simpledialog	Dialog box to take user input.
StringVar	tk.StringVar() and trace with callback functions
Spinbox	User selection from a range of options
Text	Add Text box , Multi line text entry
Toplevel	Display pop-up or child window from Parent
Parent-child	Parent Child node of Treeview
Treeview	Basics of Treeview
Treeview	Adding row to Treeview using insert()
Treeview	Adding row to Treeview after inserting data to MySQL table
validation	Validating user inputs
clock	Display time with Date
Calendar	Display Date picker
DateEntry	Display Drop-down Date entry

Layout of widgets in Tkinter window

grid	Add grid for layout management
pack	Pack for layout management
place	place for absolute and relative coordinates for layout management