More python updates

Followup to #13931

buildroot/share/atom/auto_build.py

+#!/usr/bin/env python
 #######################################
 #
 # Marlin 3D Printer Firmware
 #
 #######################################
 
+from __future__ import print_function
+from __future__ import division
+
 import sys
 import os
 
 if 0 <= pwd.find('buildroot/share/atom'):
   pwd = pwd[ : pwd.find('buildroot/share/atom')]
   os.chdir(pwd)
-print 'pwd: ', pwd
+print('pwd: ', pwd)
 
 num_args = len(sys.argv)
 if num_args > 1:
   build_type = str(sys.argv[1])
 else:
-  print 'Please specify build type'
+  print('Please specify build type')
   exit()
 
-print'build_type:  ', build_type
+print('build_type:  ', build_type)
 
-print '\nWorking\n'
+print('\nWorking\n')
 
 python_ver = sys.version_info[0] # major version - 2 or 3
 
 if python_ver == 2:
-  print "python version " + str(sys.version_info[0]) + "." + str(sys.version_info[1]) + "." + str(sys.version_info[2])
+  print("python version " + str(sys.version_info[0]) + "." + str(sys.version_info[1]) + "." + str(sys.version_info[2]))
 else:
-  print "python version " + str(sys.version_info[0])
-  print "This script only runs under python 2"
+  print("python version " + str(sys.version_info[0]))
+  print("This script only runs under python 2")
   exit()
 
 import platform
 #  returns: environment
 def get_env(board_name, ver_Marlin):
       def no_environment():
-            print 'ERROR - no environment for this board'
-            print board_name
+            print('ERROR - no environment for this board')
+            print(board_name)
             raise SystemExit(0)                          # no environment so quit
 
       def invalid_board():
-            print 'ERROR - invalid board'
-            print board_name
+            print('ERROR - invalid board')
+            print(board_name)
             raise SystemExit(0)                          # quit if unable to find board
 
 
               invalid_board()
 
       if build_type == 'traceback' and not(target_env == 'LPC1768_debug_and_upload' or target_env == 'DUE_debug')  and Marlin_ver == 2:
-          print "ERROR - this board isn't setup for traceback"
-          print 'board_name: ', board_name
-          print 'target_env: ', target_env
+          print("ERROR - this board isn't setup for traceback")
+          print('board_name: ', board_name)
+          print('target_env: ', target_env)
           raise SystemExit(0)
 
       return target_env
     global build_type
     global target_env
     global board_name
-    print 'build_type:  ', build_type
+    print('build_type:  ', build_type)
 
     import subprocess
     import sys
 
-    print 'starting platformio'
+    print('starting platformio')
 
     if   build_type == 'build':
           # platformio run -e  target_env
 
 
     else:
-          print 'ERROR - unknown build type:  ', build_type
+          print('ERROR - unknown build type:  ', build_type)
           raise SystemExit(0)     # kill everything
 
   # stream output from subprocess and split it into lines
         self.start_thread()
 
     def rebuild(self, event):
-        print "event happened"
+        print("event happened")
         self._rebuild()
 
 

buildroot/share/atom/create_custom_upload_command_CDC.py

       if com_CDC == 'COM_PORT_NOT_FOUND':
           print(com_CDC, '\n')
       else:
-          print('FOUND: ' ,com_CDC)
-          print('DESCRIPTION: ',  description_CDC , '\n')
+          print('FOUND: ', com_CDC)
+          print('DESCRIPTION: ', description_CDC, '\n')
 
   if current_OS == 'Windows':
 

buildroot/share/scripts/createTemperatureLookupMarlin.py

-#!/usr/bin/python
+#!/usr/bin/env python
 """Thermistor Value Lookup Table Generator
 
 Generates lookup to temperature values for use in a microcontroller in C format based on:

buildroot/share/scripts/g29_auto.py

-#!/usr/bin/python
+#!/usr/bin/env python
 
 # This file is for preprocessing gcode and the new G29 Autobedleveling from Marlin
 # It will analyse the first 2 Layer and return the maximum size for this part