diff --git a/flashair.py b/flashair.py
index d45b181..0997c9a 100755
--- a/flashair.py
+++ b/flashair.py
@@ -58,8 +58,10 @@ def get_files(self):
                 print('error', r.status_code)
             sys.exit(1)
 
-        for line in r.text.split()[1:]:
+        for line in r.text.split("\r\n")[1:]:
             # this code has to handle commas in file name and directory name. in data that's comma-delimited
+            if not len(line.strip()):
+                continue
             first, size, attrib, date, time=line.rsplit(',', 4)
-            file=first[len(self.dir):]
+            file=first[len(self.dir):].strip(',')    # to strip the comma on higher levels
             self.files.append((file, int(size), int(attrib)))
diff --git a/sdls b/sdls
index 949f101..77376ad 100755
--- a/sdls
+++ b/sdls
@@ -1,4 +1,4 @@
-#! /usr/bin/python3
+#!/usr/bin/env python3
 # list files on Toshiba FlashAir SD card via wi-fi
 # see https://www.flashair-developers.com/en/documents/api/
 
@@ -38,9 +38,6 @@ for file, size, attrib in card.files:
     else:
         # this is a file
         # comma-formatted number
-        kb=size/1024
-        mb=size/1048576
-        gb=size/1073741824
         output.append((size, file, '{:,}'.format(size), fmt(size)))
         sum+=size
 
diff --git a/sdput b/sdput
index da9187f..550b8c8 100755
--- a/sdput
+++ b/sdput
@@ -1,4 +1,4 @@
-#! /usr/bin/python3
+#!/usr/bin/env python3
 # put files on Toshiba FlashAir SD card via wi-fi
 # see https://www.flashair-developers.com/en/documents/api/
 
diff --git a/sdrm b/sdrm
index d21903a..551bb68 100755
--- a/sdrm
+++ b/sdrm
@@ -1,4 +1,4 @@
-#! /usr/bin/python3
+#!/usr/bin/env python3
 # delete files from Toshiba FlashAir SD card via wi-fi
 # see https://www.flashair-developers.com/en/documents/api/