Remove some more python2-compat code

Author: Hugo Osvaldo Barrera

barcode/__init__.py

@@ -9,19 +9,14 @@
 rendered as images (all formats supported by Pillow).
 """
 
+from barcode.codex import Code128, Code39, Gs1_128, PZN
+from barcode.ean import EAN13, EAN14, EAN8, JAN
 from barcode.errors import BarcodeNotFoundError
-from barcode.codex import Code39, PZN, Code128, Gs1_128
-from barcode.ean import EAN8, EAN13, EAN14, JAN
 from barcode.isxn import ISBN10, ISBN13, ISSN
-from barcode.upc import UPCA
 from barcode.itf import ITF
+from barcode.upc import UPCA
 from barcode.version import version  # noqa: F401
 
-try:
-    _strbase = basestring  # lint:ok
-except NameError:
-    _strbase = str
-
 
 __BARCODE_MAP = dict(
     ean8=EAN8,
@@ -71,7 +66,7 @@ def generate(name, code, writer=None, output=None, writer_options=None,
     barcode = get(name, code, writer, options)
     if pil:
         return barcode.render(writer_options, text)
-    if isinstance(output, _strbase):
+    if isinstance(output, str):
         fullname = barcode.save(output, options, text)
         return fullname
     else:

barcode/pybarcode.py

@@ -1,11 +1,9 @@
 import os
-
-import barcode
-
 from argparse import ArgumentParser
 
-from barcode.writer import ImageWriter, SVGWriter
+import barcode
 from barcode.version import version
+from barcode.writer import ImageWriter, SVGWriter
 
 # Optional PyQt4 GUI
 try:

barcode/upc.py

@@ -1,21 +1,18 @@
+"""Module: barcode.upc
+
+:Provided barcodes: UPC-A
+"""
+__docformat__ = 'restructuredtext en'
+
+from functools import reduce
+
 from barcode.base import Barcode
 from barcode.charsets import upc as _upc
 from barcode.errors import (
     IllegalCharacterError,
     NumberOfDigitsError,
 )
 
-try:
-    reduce
-except NameError:
-    from functools import reduce
-
-"""Module: barcode.upc
-
-:Provided barcodes: UPC-A
-"""
-__docformat__ = 'restructuredtext en'
-
 
 class UniversalProductCodeA(Barcode):
     """Initializes new UPC-A barcode.
@@ -110,4 +107,5 @@ def render(self, writer_options=None, text=None):
         options.update(writer_options or {})
         return Barcode.render(self, options, text)
 
+
 UPCA = UniversalProductCodeA

setup.py

@@ -1,6 +1,5 @@
-# -*- coding: utf-8 -*-
-
 from pathlib import Path
+
 from setuptools import find_packages, setup