How to imitate this table using Tkinter?

You have to create an array of ext entries, and lay then out with the "grid" layout manager in a parent frame.

Developing a Python's class to allow managing the grid and cell contents as a single table, implementing things like __getindex__ to get cell contents, and even some bits of reactive programing, allowing certain cols to change with values changing elsewhere would be the fun part in such a project.

To create the grid, it is just a matter of:

import tkinter
window = tkinter.Tk()
frame = Tkinter.Frame(window)
frame.pack()

entries = {} # this 'entries'is what you might want to specify a custom class to manage
             # for now,a dictionary will do

for j in range(10):
    for i in range(10):
        e = tkinter.Entry(f)
        e.grid(column=i,row=j, borderwidth=0)
        es[i,j] = e

And there you are.

Use the Ttk/Tkinter Treeview widget. This provides either a tree-style layout or a listview style columns with headings layout.

As the Treeview widget is from Tk's themed icon set it will look appropriate on Windows - picking up the current border and column heading styles so that the look should match the current example posted.

Example (that will work in both Python 2 & 3):

try:
    from Tkinter import *
    from ttk import *
except ImportError:  # Python 3
    from tkinter import *
    from tkinter.ttk import *


class App(Frame):

    def __init__(self, parent):
        Frame.__init__(self, parent)
        self.CreateUI()
        self.LoadTable()
        self.grid(sticky = (N,S,W,E))
        parent.grid_rowconfigure(0, weight = 1)
        parent.grid_columnconfigure(0, weight = 1)

    def CreateUI(self):
        tv = Treeview(self)
        tv['columns'] = ('starttime', 'endtime', 'status')
        tv.heading("#0", text='Sources', anchor='w')
        tv.column("#0", anchor="w")
        tv.heading('starttime', text='Start Time')
        tv.column('starttime', anchor='center', width=100)
        tv.heading('endtime', text='End Time')
        tv.column('endtime', anchor='center', width=100)
        tv.heading('status', text='Status')
        tv.column('status', anchor='center', width=100)
        tv.grid(sticky = (N,S,W,E))
        self.treeview = tv
        self.grid_rowconfigure(0, weight = 1)
        self.grid_columnconfigure(0, weight = 1)

    def LoadTable(self):
        self.treeview.insert('', 'end', text="First", values=('10:00',
                             '10:10', 'Ok'))

def main():
    root = Tk()
    App(root)
    root.mainloop()

if __name__ == '__main__':
    main()

This should yield something like this on Windows: