Remove compat code for old versions of Pillow

src/sigal/image.py

@@ -29,7 +29,6 @@
 #
 # and partially modified. The code in question is licensed under MIT license.
 
-import fractions
 import logging
 import os
 import sys
@@ -41,17 +40,12 @@ import pilkit.processors
 from PIL import Image as PILImage
 from PIL import ImageFile, ImageOps, IptcImagePlugin
 from PIL.ExifTags import GPSTAGS, TAGS
+from PIL.TiffImagePlugin import IFDRational
 from pilkit.processors import Transpose
 from pilkit.utils import save_image
 
 from . import signals, utils
 
-try:
-    # Pillow 7.2+
-    from PIL.TiffImagePlugin import IFDRational
-except ImportError:
-    IFDRational = None
-
 # Force loading of truncated files
 ImageFile.LOAD_TRUNCATED_IMAGES = True
 
@@ -316,14 +310,9 @@ def get_image_metadata(filename):
 def dms_to_degrees(v):
     """Convert degree/minute/second to decimal degrees."""
 
-    if IFDRational and isinstance(v[0], IFDRational):
-        d = float(v[0])
-        m = float(v[1])
-        s = float(v[2])
-    else:
-        d = float(v[0][0]) / float(v[0][1])
-        m = float(v[1][0]) / float(v[1][1])
-        s = float(v[2][0]) / float(v[2][1])
+    d = float(v[0])
+    m = float(v[1])
+    s = float(v[2])
     return d + (m / 60.0) + (s / 3600.0)
 
 
@@ -341,32 +330,21 @@ def get_exif_tags(data, datetime_format="%c"):
     if "FNumber" in data:
         fnumber = data["FNumber"]
         try:
-            if IFDRational and isinstance(fnumber, IFDRational):
-                simple["fstop"] = float(fnumber)
-            else:
-                simple["fstop"] = float(fnumber[0]) / fnumber[1]
+            simple["fstop"] = float(fnumber)
         except Exception:
             logger.debug("Skipped invalid FNumber: %r", fnumber, exc_info=True)
 
     if "FocalLength" in data:
         focal = data["FocalLength"]
         try:
-            if IFDRational and isinstance(focal, IFDRational):
-                simple["focal"] = round(float(focal))
-            else:
-                simple["focal"] = round(float(focal[0]) / focal[1])
+            simple["focal"] = round(float(focal))
         except Exception:
             logger.debug("Skipped invalid FocalLength: %r", focal, exc_info=True)
 
     if "ExposureTime" in data:
         exptime = data["ExposureTime"]
-        if IFDRational and isinstance(exptime, IFDRational):
+        if isinstance(exptime, IFDRational):
             simple["exposure"] = f"{exptime.numerator}/{exptime.denominator}"
-        elif isinstance(exptime, tuple):
-            try:
-                simple["exposure"] = str(fractions.Fraction(exptime[0], exptime[1]))
-            except ZeroDivisionError:
-                logger.info("Invalid ExposureTime: %r", exptime)
         elif isinstance(exptime, int):
             simple["exposure"] = str(exptime)
         else:

tests/test_image.py

@@ -179,11 +179,7 @@ def test_get_exif_tags():
     assert simple["iso"] == 50
     assert simple["Make"] == "NIKON"
     assert simple["datetime"] == "22/01/2006"
-    try:
-        # Pillow 7.2+
-        assert simple["exposure"] == "0.00100603"
-    except Exception:
-        assert simple["exposure"] == "100603/100000000"
+    assert simple["exposure"] == "100603/100000000"
 
     data = {"FNumber": [1, 0], "FocalLength": [1, 0], "ExposureTime": 10}
     simple = get_exif_tags(data)
@@ -264,12 +260,6 @@ def test_iso_speed_ratings():
     assert "iso" in simple
 
 
-def test_null_exposure_time():
-    data = {"ExposureTime": (0, 0)}
-    simple = get_exif_tags(data)
-    assert "exposure" not in simple
-
-
 def test_exif_copy(tmpdir):
     "Test if EXIF data can transferred copied to the resized image."