Main Function Call Fails In Python

I wrote the following code that creates a layout and displays some text in the layout. Next the layout is displayed on the console screen using raw display module from urwid librar

Solution 1:

FormDisplay in your code is not a class but a function, something like this would be more appropriate. Btw, I'd recommend reading up on some of this doc http://docs.python.org/2/tutorial/classes.html

import urwid.raw_display

classFormDisplay(object):

    def__init__(self):
        self.ui = urwid.raw_display.Screen()
        self.palette = ui.register_palette([
        ('Field', 'dark green, bold', 'black'), # information fields, Search: etc.
        ('Info', 'dark green', 'black'), # information in fields
        ('Bg', 'black', 'black'), # screen background
        ('InfoFooterText', 'white', 'dark blue'), # footer text
        ('InfoFooterHotkey', 'dark cyan, bold', 'dark blue'), # hotkeys in footer text
        ('InfoFooter', 'black', 'dark blue'),  # footer background
        ('InfoHeaderText', 'white, bold', 'dark blue'), # header text
        ('InfoHeader', 'black', 'dark blue'), # header background
        ('BigText', RandomColor(), 'black'), # main menu banner text
        ('GeneralInfo', 'brown', 'black'), # main menu text
        ('LastModifiedField', 'dark cyan, bold', 'black'), # Last modified:
        ('LastModifiedDate', 'dark cyan', 'black'), # info in Last modified:
        ('PopupMessageText', 'black', 'dark cyan'), # popup message text
        ('PopupMessageBg', 'black', 'dark cyan'), # popup message background
        ('SearchBoxHeaderText', 'light gray, bold', 'dark cyan'), # field names in the search box
        ('SearchBoxHeaderBg', 'black', 'dark cyan'), # field name background in the search box
        ('OnFocusBg', 'white', 'dark magenta') # background when a widget is focused
       ])

    defmain(self):
        #self.view = ui.run_wrapper(formLayout)
        self.view = formLayout()
        self.ui.start()
        self.loop = urwid.MainLoop(self.view, self.palette,   unhandled_input=self.unhandled_input)
        self.loop.run()

if __name__ == "__main__":
    form = FormDisplay()
    form.main()

Solution 2:

I don't see any separate class. But according to your code, FormDisplay is a function that return nothing. FormDisplay().main() equals None.main().