fix Pylint warnings

2 files changed, 9 insertions, 9 deletions

diff --git a/bin/shift.py b/bin/shift.py
index 94db333..b837c53 100644
--- a/bin/shift.py
+++ b/bin/shift.py
@@ -25,11 +25,11 @@ def _main_shift(
     else:
         image.save(output_path, output)
 
-def _parse_direction(s):
+def _parse_direction(src):
     try:
-        return Direction(s)
+        return Direction(src)
     except ValueError:
-        raise argparse.ArgumentTypeError('invalid direction: ' + s)
+        raise argparse.ArgumentTypeError('invalid direction: ' + src)
 
 def _parse_args(args=sys.argv):
     parser = argparse.ArgumentParser(
diff --git a/bin/utils/cmd_line.py b/bin/utils/cmd_line.py
index 6bfeafe..43f7bca 100644
--- a/bin/utils/cmd_line.py
+++ b/bin/utils/cmd_line.py
@@ -5,11 +5,11 @@
 
 import argparse
 
-def parse_non_negative_integer(s):
+def parse_non_negative_integer(src):
     try:
-        x = int(s)
+        n = int(src)
     except ValueError:
-        raise argparse.ArgumentTypeError('must be a non-negative integer: ' + s)
-    if x < 0:
-        raise argparse.ArgumentTypeError('must be a non-negative integer: ' + s)
-    return x
+        raise argparse.ArgumentTypeError('must be a non-negative integer: ' + src)
+    if n < 0:
+        raise argparse.ArgumentTypeError('must be a non-negative integer: ' + src)
+    return n