Remove imports and make PEP8 changes

Author: mwcraig

vpython/no_notebook.py

@@ -13,9 +13,6 @@
 import txaio
 import copy
 import socket
-import PyQt5.QtCore
-import PyQt5.QtWebEngineWidgets
-from PyQt5.QtWidgets import QApplication
 import multiprocessing
 
 
@@ -153,7 +150,7 @@ def onOpen(self):
     # in favor of "async def onMessage...", and "yield from" with "await".
     # Attempting to use the older Python 3.4 syntax was not successful, so this
     # no-notebook version of VPython requires Python 3.5.3 or later.
-    #@asyncio.coroutine
+    # @asyncio.coroutine
     # def onMessage(self, data, isBinary): # data includes canvas update, events, pick, compound
     # data includes canvas update, events, pick, compound
     async def onMessage(self, data, isBinary):
@@ -236,8 +233,8 @@ def onClose(self, wasClean, code, reason):
     else:
         __server = HTTPServer(('', __HTTP_PORT), serveHTTP)
         # or webbrowser.open_new_tab()
-        if(_browsertype=='default'): #uses default browser
-            _webbrowser.open('http://localhost:{}'.format(__HTTP_PORT)) #uses default browser
+        if _browsertype == 'default':  # uses default browser
+            _webbrowser.open('http://localhost:{}'.format(__HTTP_PORT))
 
 except:
     pass
@@ -246,13 +243,13 @@ def onClose(self, wasClean, code, reason):
 def start_Qapp(port):
     # creates a python browser with PyQt5
     # runs qtbrowser.py in a separate process
-    filepath=os.path.dirname(__file__)
-    filename=filepath+'/qtbrowser.py'
-    os.system('python '+filename+' http://localhost:{}'.format(port))
+    filepath = os.path.dirname(__file__)
+    filename = filepath + '/qtbrowser.py'
+    os.system('python ' + filename + ' http://localhost:{}'.format(port))
 
 
-#create a browser in its own process
-if(_browsertype=='pyqt'): #uses default browser
+# create a browser in its own process
+if _browsertype == 'pyqt':
     __m = multiprocessing.Process(target=start_Qapp, args=(__HTTP_PORT,))
     __m.start()
 

vpython/qtbrowser.py

@@ -3,9 +3,8 @@
 import PyQt5.QtWebEngineWidgets
 from PyQt5.QtWidgets import QApplication
 
-print(sys.argv)
 
-if(len(sys.argv)>1):
+if len(sys.argv) > 1:
 
     if sys.argv[1]:
 
@@ -18,7 +17,9 @@
         sys.exit(app.exec_())
 
     else:
-        print("Please give a URL as the first command-line argument when running the program.")
+        print("Please give a URL as the first command-line argument "
+              "when running the program.")
 
 else:
-    print("Please give a URL as the first command-line argument when running the program.")
+    print("Please give a URL as the first command-line argument "
+          "when running the program.")