This widget is used to display items with hierarchy. For instance, windows explorer can be reproduced in this way. Some nice tables can be also done using treeview widget.

Create the widget

tree=ttk.Treeview(master)

Definition of the columns

You can define how many columns, their width and minimum width when the user tries to stretch it. By defining stretch=tk.NO, the user cannot modify the width of the column.

tree["columns"]=("one","two","three")
tree.column("#0", width=270, minwidth=270, stretch=tk.NO)
tree.column("one", width=150, minwidth=150, stretch=tk.NO)
tree.column("two", width=400, minwidth=200)
tree.column("three", width=80, minwidth=50, stretch=tk.NO)

Definition of the headings

tree.heading("#0",text="Name",anchor=tk.W)
tree.heading("one", text="Date modified",anchor=tk.W)
tree.heading("two", text="Type",anchor=tk.W)
tree.heading("three", text="Size",anchor=tk.W)

Insert some rows

# Level 1
folder1=tree.insert("", 1, "", text="Folder 1", values=("23-Jun-17 11:05","File folder",""))
tree.insert("", 2, "", text="text_file.txt", values=("23-Jun-17 11:25","TXT file","1 KB"))
# Level 2
tree.insert(folder1, "end", "", text="photo1.png", values=("23-Jun-17 11:28","PNG file","2.6 KB"))
tree.insert(folder1, "end", "", text="photo2.png", values=("23-Jun-17 11:29","PNG file","3.2 KB"))
tree.insert(folder1, "end", "", text="photo3.png", values=("23-Jun-17 11:30","PNG file","3.1 KB"))

Packing

tree.pack(side=tk.TOP,fill=tk.X)

On Windows, the following screenshot can be obtained from this example.

The widget ttk.progress is useful when dealing with long computations so that the user knows that the program is running. Following, an example updating a progressbar each 0.5 seconds is given:

Function updating the progressbar

def progress(currentValue):
    progressbar["value"]=currentValue

Set the maximum value

maxValue=100

Create the progress bar

progressbar=ttk.Progressbar(master,orient="horizontal",length=300,mode="determinate")
progressbar.pack(side=tk.TOP)

"determinate" mode is used when the progressbar is under control of the program.

Initial and maximum values

currentValue=0
progressbar["value"]=currentValue
progressbar["maximum"]=maxValue

Emulate progress each 0.5 s

divisions=10
for i in range(divisions):
    currentValue=currentValue+10
    progressbar.after(500, progress(currentValue))
    progressbar.update() # Force an update of the GUI