Python script for 3 -> 2 colour converison

This is a python script in beta phase. Please make a backup of the E-Paper-Master folder before executing.
It's intended for users who want to try the software on the 2-colour E-Paper display from waveshare. Download and copy this script in the 'Calendar' folder. Follow the instructions within the python script and edit accordingly.

After executing the script, reboot the Raspberry Pi to apply the changes. That's all. Any feedback is greatly appreciated.

3-colour to 2-colour converter.py

@@ -0,0 +1,60 @@
+"""
+This is a python image converter specific for the E-Paper-Calendar
+on github by aceisace from the link below.
+(https://github.com/aceisace/E-Paper-Calendar-with-iCal-sync-and-live-weather)
+
+It will convert the 3-colour .bmp's to 2-colour .bmp's so that they can be
+used even with the 2-Colour 7.5" E-Paper Display from waveshare.
+
+Please use with caution. If the input and output paths are the same, the
+convertr will overwrite all .bmp files. It's highly recommended to make a
+backup of the entire 'Calendar" folder first.
+
+Copyright by Ace-Laboratory
+"""
+
+#--------------only change the following two lines-----------------#
+input_path =  '/home/pi/E-Paper-Master/Calendar/other/'
+output_path = '/home/pi/E-Paper-Master/Calendar/other/'
+#-----------------no need to change anything below-----------------#
+
+
+"""
+Info: These path contain the bmps that require converting.
+1) /home/pi/E-Paper-Master/Calendar/months/
+3) /home/pi/E-Paper-Master/Calendar/other/
+"""
+import glob, os, errno
+from PIL import Image
+import PIL.ImageOps
+
+imagenames = []
+
+print('opening the specified directory...')
+
+os.chdir(input_path) #folder containg files
+for files in glob.glob('*.bmp'): #find bmp files
+    imagenames.append(files) #add these files to a list
+
+print('Found these files:', imagenames) #print this list
+
+# 0 is black, 255 is white, 127 is red.
+# The following will convert the 'red' parts to white parts.
+thresh = 100 # any value below 127 works.
+fn = lambda x : 255 if x > thresh else 0
+
+try:
+    print('checking if the output path exists...')
+    os.makedirs(output_path)
+except OSError as e:
+    print('Oh, the output path exists already.')
+    print('Will attempt to overwrite all files')
+    if e.errno != errno.EEXIST:
+        raise
+
+print('attempting to convert images...')   
+for files in imagenames:
+    ((Image.open(input_path+files)).convert('L').point(fn, mode='1').save(output_path+files))
+
+print('All done!')
+print('You can find your converted files in: ',output_path)