display error message when python binary not found

WakaTime.py

@@ -89,17 +89,16 @@ def prompt_api_key():
 
 
 def python_binary():
-    python = 'python'
     if platform.system() == 'Windows':
+        try:
+            Popen(['pythonw', '--version'])
+            return 'pythonw'
+        except:
             for path in glob.iglob('/python*'):
                 if exists(realpath(join(path, 'pythonw.exe'))):
                     return realpath(join(path, 'pythonw'))
-        try:
-            python = 'pythonw'
-            Popen([python, '--version'])
-        except:
-            python = None
-    return python
+            return None
+    return 'python'
 
 
 def enough_time_passed(now):
@@ -166,12 +165,10 @@ class SendActionThread(threading.Thread):
                 print(cmd)
             code = wakatime.main(cmd)
             if code != 0:
-                print('Error: Response code %d from wakatime package.' % code)
+                print('Error: Response code %d from wakatime package' % code)
         else:
             python = python_binary()
-            if not python:
-                print('Error: Could not find python binary.')
-            else:
+            if python:
                 cmd.insert(0, python)
                 if self.debug:
                     print(cmd)
@@ -180,6 +177,8 @@ class SendActionThread(threading.Thread):
                 else:
                     with open(join(expanduser('~'), '.wakatime.log'), 'a') as stderr:
                         Popen(cmd, stderr=stderr)
+            else:
+                print('Error: Unable to find python binary.')
 
 
 def plugin_loaded():