#!/usr/bin/env python
import wx
import md5
import sys


filename = sys.argv[1]
def sumfile(fobj):
    '''Returns an md5 hash for an object with read() method.'''
    m = md5.new()

    while True:
        d = fobj.read(8096)
        if not d:
            break
        m.update(d)
    return m.hexdigest()


def md5sum(fname):
    '''Returns an md5 hash for file fname, or stdin if fname is "-".'''
    if fname == '-':
        ret = sumfile(stdin)
    else:
        try:
            f = file(fname, 'rb')
        except:
            return 'Failed to open file'
        ret = sumfile(f)
        f.close()
    return ret

app = wx.PySimpleApp()
d = wx.MessageDialog(None, "md5 of " + filename + ": " + md5sum(filename), "pika",wx.OK)
d.ShowModal()
d.Destroy()
app.MainLoop()