Rip out remaining python3 support

https://www.enricozini.org/blog/2020/python/python-2-is-dead/

setup.py

@@ -1,8 +1,6 @@
 import sys
 from setuptools import setup
 
-PY3 = sys.version_info[0] >= 3
-
 VERSION = "0.3.4"
 
 INSTALL_REQUIRES = (
@@ -13,9 +11,6 @@ TESTS_REQUIRE = (
     'pdfrw',
 )
 
-if not PY3:
-    INSTALL_REQUIRES += ('enum34',)
-
 
 setup(
     name='img2pdf',

src/img2pdf.py

@@ -42,8 +42,6 @@ try:
 except ImportError:
     pass
 
-PY3 = sys.version_info[0] >= 3
-
 __version__ = "0.3.4"
 default_dpi = 96.0
 papersizes = {
@@ -574,16 +572,12 @@ class MyPdfWriter:
         self.addobj(page)
 
 
-if PY3:
-
 class MyPdfString:
     @classmethod
     def encode(cls, string, hextype=False):
         if hextype:
             return (
-                    b"< "
-                    + b" ".join(("%06x" % c).encode("ascii") for c in string)
-                    + b" >"
+                b"< " + b" ".join(("%06x" % c).encode("ascii") for c in string) + b" >"
             )
         else:
             try:
@@ -600,25 +594,6 @@ if PY3:
             return b"(" + string + b")"
 
 
-else:
-
-    class MyPdfString(object):
-        @classmethod
-        def encode(cls, string, hextype=False):
-            if hextype:
-                return (
-                    b"< "
-                    + b" ".join(("%06x" % c).encode("ascii") for c in string)
-                    + b" >"
-                )
-            else:
-                # This mimics exactely to what pdfrw does.
-                string = string.replace(b"\\", b"\\\\")
-                string = string.replace(b"(", b"\\(")
-                string = string.replace(b")", b"\\)")
-                return b"(" + string + b")"
-
-
 class pdfdoc(object):
     def __init__(
         self,
@@ -1817,9 +1792,9 @@ def convert(*images, **kwargs):
     for kwname, default in _default_kwargs.items():
         if kwname not in kwargs:
             kwargs[kwname] = default
-    if 'with_pdfrw' in kwargs:
+    if "with_pdfrw" in kwargs:
         global with_pdfrw
-        with_pdfrw = kwargs['with_pdfrw']
+        with_pdfrw = kwargs["with_pdfrw"]
 
     pdf = pdfdoc(
         "1.3",
@@ -2109,14 +2084,10 @@ def parse_borderarg(string):
 def input_images(path):
     if path == "-":
         # we slurp in all data from stdin because we need to seek in it later
-        if PY3:
         result = sys.stdin.buffer.read()
-        else:
-            result = sys.stdin.read()
         if len(result) == 0:
             raise argparse.ArgumentTypeError('"%s" is empty' % path)
     else:
-        if PY3:
         try:
             if os.path.getsize(path) == 0:
                 raise argparse.ArgumentTypeError('"%s" is empty' % path)
@@ -2130,18 +2101,6 @@ def input_images(path):
             raise argparse.ArgumentTypeError('"%s" permission denied' % path)
         except FileNotFoundError:
             raise argparse.ArgumentTypeError('"%s" does not exist' % path)
-        else:
-            try:
-                if os.path.getsize(path) == 0:
-                    raise argparse.ArgumentTypeError('"%s" is empty' % path)
-                # test-read a byte from it so that we can abort early in case
-                # we cannot read data from the file
-                with open(path, "rb") as im:
-                    im.read(1)
-            except IOError as err:
-                raise argparse.ArgumentTypeError(str(err))
-            except OSError as err:
-                raise argparse.ArgumentTypeError(str(err))
         result = path
     return result
 
@@ -3085,10 +3044,7 @@ Report bugs at https://gitlab.mister-muffin.de/josch/img2pdf/issues
         help="Prints version information and exits.",
     )
     parser.add_argument(
-        "--gui",
-        dest="gui",
-        action="store_true",
-        help="run experimental tkinter gui",
+        "--gui", dest="gui", action="store_true", help="run experimental tkinter gui"
     )
 
     outargs = parser.add_argument_group(
@@ -3453,10 +3409,7 @@ and left/right, respectively. It is not possible to specify asymmetric borders.
     if len(args.images) == 0:
         logging.info("reading image from standard input")
         try:
-            if PY3:
             args.images = [sys.stdin.buffer.read()]
-            else:
-                args.images = [sys.stdin.read()]
         except KeyboardInterrupt:
             exit(0)
 

src/tests/__init__.py

@@ -10,12 +10,7 @@ from io import StringIO, BytesIO, TextIOWrapper
 
 HERE = os.path.dirname(__file__)
 
-PY3 = sys.version_info[0] >= 3
-
-if PY3:
 PdfReaderIO = StringIO
-else:
-    PdfReaderIO = BytesIO
 
 # Recompressing the image stream makes the comparison robust against output
 # preserving changes in the zlib compress output bitstream
@@ -480,7 +475,6 @@ def tiff_header_for_ccitt(width, height, img_size, ccitt_group=4):
 
 class CommandLineTests(unittest.TestCase):
     def test_main_help(self):
-        if PY3:
         from contextlib import redirect_stdout
         f = StringIO()
         with redirect_stdout(f):
@@ -490,19 +484,6 @@ class CommandLineTests(unittest.TestCase):
                 pass
         res = f.getvalue()
         self.assertIn('img2pdf', res)
-        else:
-            # silence output
-            sys_stdout = sys.stdout
-            sys.stdout = BytesIO()
-
-            try:
-                img2pdf.main(['img2pdf', '--help'])
-            except SystemExit:
-                # argparse does sys.exit(0) on --help
-                res = sys.stdout.getvalue()
-                self.assertIn('img2pdf', res)
-            finally:
-                sys.stdout = sys_stdout
 
 
 def test_suite():