import csv
import PySimpleGUI as sg
import sys

def table_example():
    filename = sg.PopupGetFile('filename to open', no_window=True, file_types=(("CSV Files","*.csv"),))
    # --- populate table with file contents --- #
    if filename == '':
        sys.exit(69)
    data = []
    header_list = []
    button = sg.PopupYesNo('Does this file have column names already?')
    if filename is not None:
        with open(filename, "r") as infile:
            reader = csv.reader(infile)
            if button == 'Yes':
                header_list = next(reader)
            try:
                data = list(reader)  # read everything else into a list of rows
                if button == 'No':
                    header_list = ['column' + str(x) for x in range(len(data[0]))]
            except:
                sg.PopupError('Error reading file')
                sys.exit(69)
    sg.SetOptions(element_padding=(0, 0))

    col_layout = [[sg.Table(values=data, headings=header_list, max_col_width=25,
                            auto_size_columns=True, justification='right', size=(None, len(data)))]]

    canvas_size = (13*10*len(header_list), 600)      # estimate canvas size - 13 pixels per char * 10 char per column * num columns
    layout = [[sg.Column(col_layout, size=canvas_size, scrollable=True)],]

    window = sg.Window('Table', grab_anywhere=False).Layout(layout)
    b, v = window.Read()

    sys.exit(69)

table_example()