Major update of all demo programs to use new PEP8 bindings, etc

DemoPrograms old/Demo_psutil_Kill_Processes.py

@@ -0,0 +1,126 @@
+#!/usr/bin/env python
+import sys
+import sys
+if sys.version_info[0] >= 3:
+    import PySimpleGUI as sg
+else:
+    import PySimpleGUI27 as sg
+import os
+import signal
+import psutil
+import operator
+
+CONFIRM_KILLS = False
+
+"""
+    Utility to show running processes, CPU usage and provides way to kill processes.
+    Based on psutil package that is easily installed using pip
+"""
+
+def kill_proc_tree(pid, sig=signal.SIGTERM, include_parent=True,
+                   timeout=None, on_terminate=None):
+    """Kill a process tree (including grandchildren) with signal
+    "sig" and return a (gone, still_alive) tuple.
+    "on_terminate", if specified, is a callabck function which is
+    called as soon as a child terminates.
+    """
+    if pid == os.getpid():
+        raise RuntimeError("I refuse to kill myself")
+    parent = psutil.Process(pid)
+    children = parent.children(recursive=True)
+    if include_parent:
+        children.append(parent)
+    for p in children:
+        p.send_signal(sig)
+    gone, alive = psutil.wait_procs(children, timeout=timeout,
+                                    callback=on_terminate)
+    return (gone, alive)
+
+
+def show_list_by_name(window):
+    psutil.cpu_percent(interval=.1)
+    procs = psutil.process_iter()
+    all_procs = [[proc.cpu_percent(), proc.name(), proc.pid] for proc in procs]
+    sorted_by_cpu_procs = sorted(all_procs, key=operator.itemgetter(1), reverse=False)
+    display_list = []
+    for process in sorted_by_cpu_procs:
+        display_list.append('{:5d} {:5.2f} {}\n'.format(process[2], process[0] / 10, process[1]))
+    window.FindElement('_processes_').Update(display_list)
+    return display_list
+
+def main():
+
+    # ----------------  Create Form  ----------------
+    # sg.ChangeLookAndFeel('Topanga')
+
+    layout = [[sg.Text('Process Killer - Choose one or more processes',
+                       size=(45,1), font=('Helvetica', 15), text_color='red')],
+              [sg.Listbox(values=[' '], size=(50, 30), select_mode=sg.SELECT_MODE_EXTENDED,  font=('Courier', 12), key='_processes_')],
+              [sg.Text('Click refresh once or twice.. once for list, second to get CPU usage')],
+              [sg.T('Filter by typing name', font='ANY 14'), sg.In(size=(15,1), font='any 14', key='_filter_')],
+              [sg.Button('Sort by Name', ),
+               sg.Button('Sort by % CPU', button_color=('white', 'DarkOrange2')),
+               sg.Button('Kill', button_color=('white','red'), bind_return_key=True),
+               sg.Exit(button_color=('white', 'sea green'))]]
+
+    window = sg.Window('Process Killer',
+                       keep_on_top=True,
+                       auto_size_buttons=False,
+                       default_button_element_size=(12,1),
+                       return_keyboard_events=True,
+                       ).Layout(layout).Finalize()
+
+
+    display_list = show_list_by_name(window)
+    # ----------------  main loop  ----------------
+    while (True):
+        # --------- Read and update window --------
+        event, values = window.Read()
+        if event is None or event == 'Exit':
+            break
+
+        # skip mouse, control key and shift key events entirely
+        if 'Mouse' in event or 'Control' in event or 'Shift' in event:
+            continue
+
+        # --------- Do Button Operations --------
+        if event == 'Sort by Name':
+            display_list = show_list_by_name(window)
+            # psutil.cpu_percent(interval=.1)
+            # procs = psutil.process_iter()
+            # all_procs = [[proc.cpu_percent(), proc.name(), proc.pid] for proc in procs]
+            # sorted_by_cpu_procs = sorted(all_procs, key=operator.itemgetter(1), reverse=False)
+            # display_list = []
+            # for process in sorted_by_cpu_procs:
+            #     display_list.append('{:5d} {:5.2f} {}\n'.format(process[2], process[0]/10, process[1]))
+            # window.FindElement('_processes_').Update(display_list)
+        elif event == 'Kill':
+            processes_to_kill = values['_processes_']
+            for proc in processes_to_kill:
+                pid = int(proc[0:5])
+                # if sg.PopupYesNo('About to kill {} {}'.format(pid, proc[12:]), keep_on_top=True) == 'Yes':
+                try:
+                    kill_proc_tree(pid=pid)
+                except:
+                    sg.PopupNoWait('Error killing process', auto_close_duration=1, auto_close=True)
+        elif event == 'Sort by % CPU':
+            psutil.cpu_percent(interval=.1)
+            procs = psutil.process_iter()
+            all_procs = [[proc.cpu_percent(), proc.name(), proc.pid] for proc in procs]
+            sorted_by_cpu_procs = sorted(all_procs, key=operator.itemgetter(0), reverse=True)
+            display_list = []
+            for process in sorted_by_cpu_procs:
+                display_list.append('{:5d} {:5.2f} {}\n'.format(process[2], process[0]/10, process[1]))
+            window.FindElement('_processes_').Update(display_list)
+        else:                   # was a typed character
+            if display_list is not None:
+                new_output = []
+                for line in display_list:
+                    if values['_filter_'] in line.lower():
+                        new_output.append(line)
+                window.FindElement('_processes_').Update(new_output)
+
+
+if __name__ == "__main__":
+    main()
+    sys.exit(0)