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...Lecture gui programming prof steven ludtke n sludtke bcm edu thursday april tkinter pyqt pygtk wxpython fxpy widget a graphical object like button or slider callback function which is called when the user interacts with geometry layout manager controls where widgets are displayed standard python toolkit interface elegant but built on top of tcl tk bit clunky and slow has been used to build some very large applications eg chimera if you have choice use personal suggestion http www pythonware com library introduction index htm extended by pmw tix tkfiledialog import askdirectory options askopenle mode r askopenlename askopenlenames askopenles asksaveasle w asksaveaslename...