diff --git a/python/grass/imaging/images2swf.py b/python/grass/imaging/images2swf.py
index 7650ce2b2c9..d743a56f886 100644
--- a/python/grass/imaging/images2swf.py
+++ b/python/grass/imaging/images2swf.py
@@ -69,6 +69,7 @@
 
 import os
 import zlib
+from pathlib import Path
 
 try:
     import numpy as np
@@ -921,62 +922,60 @@ def readSwf(filename, asNumpy=True):
     images = []
 
     # Open file and read all
-    with open(filename, "rb") as fp:
-        bb = fp.read()
-
-        # Check opening tag
-        tmp = bb[0:3].decode("ascii", "ignore")
-        if tmp.upper() == "FWS":
-            pass  # ok
-        elif tmp.upper() == "CWS":
-            # Decompress movie
-            bb = bb[:8] + zlib.decompress(bb[8:])
+    bb = Path(filename).read_bytes()
+    # Check opening tag
+    tmp = bb[0:3].decode("ascii", "ignore")
+    if tmp.upper() == "FWS":
+        pass  # ok
+    elif tmp.upper() == "CWS":
+        # Decompress movie
+        bb = bb[:8] + zlib.decompress(bb[8:])
+    else:
+        raise OSError("Not a valid SWF file: " + str(filename))
+
+    # Set filepointer at first tag (skipping framesize RECT and two uin16's
+    i = 8
+    nbits = bitsToInt(bb[i : i + 1], 5)  # skip FrameSize
+    nbits = 5 + nbits * 4
+    Lrect = nbits / 8.0
+    if Lrect % 1:
+        Lrect += 1
+    Lrect = int(Lrect)
+    i += Lrect + 4
+
+    # Iterate over the tags
+    counter = 0
+    while True:
+        counter += 1
+
+        # Get tag header
+        head = bb[i : i + 6]
+        if not head:
+            break  # Done (we missed end tag)
+
+        # Determine type and length
+        T, L1, L2 = getTypeAndLen(head)
+        if not L2:
+            print("Invalid tag length, could not proceed")
+            break
+        # print(T, L2)
+
+        # Read image if we can
+        if T in {20, 36}:
+            im = _readPixels(bb, i + 6, T, L1)
+            if im is not None:
+                images.append(im)
+        elif T in {6, 21, 35, 90}:
+            print("Ignoring JPEG image: cannot read JPEG.")
         else:
-            raise OSError("Not a valid SWF file: " + str(filename))
-
-        # Set filepointer at first tag (skipping framesize RECT and two uin16's
-        i = 8
-        nbits = bitsToInt(bb[i : i + 1], 5)  # skip FrameSize
-        nbits = 5 + nbits * 4
-        Lrect = nbits / 8.0
-        if Lrect % 1:
-            Lrect += 1
-        Lrect = int(Lrect)
-        i += Lrect + 4
-
-        # Iterate over the tags
-        counter = 0
-        while True:
-            counter += 1
-
-            # Get tag header
-            head = bb[i : i + 6]
-            if not head:
-                break  # Done (we missed end tag)
-
-            # Determine type and length
-            T, L1, L2 = getTypeAndLen(head)
-            if not L2:
-                print("Invalid tag length, could not proceed")
-                break
-            # print(T, L2)
-
-            # Read image if we can
-            if T in [20, 36]:
-                im = _readPixels(bb, i + 6, T, L1)
-                if im is not None:
-                    images.append(im)
-            elif T in [6, 21, 35, 90]:
-                print("Ignoring JPEG image: cannot read JPEG.")
-            else:
-                pass  # Not an image tag
+            pass  # Not an image tag
 
-            # Detect end tag
-            if T == 0:
-                break
+        # Detect end tag
+        if T == 0:
+            break
 
-            # Next tag!
-            i += L2
+        # Next tag!
+        i += L2
     # Convert to normal PIL images if needed
     if not asNumpy:
         images2 = images