1 files changed, 14 insertions, 5 deletions
diff --git a/Cython/Build/IpythonMagic.py b/Cython/Build/IpythonMagic.py
index 2743423ee..7abb97ec7 100644
--- a/Cython/Build/IpythonMagic.py
+++ b/Cython/Build/IpythonMagic.py
@@ -56,6 +56,8 @@ import copy
 import distutils.log
 import textwrap
 
+IO_ENCODING = sys.getfilesystemencoding()
+IS_PY2 = sys.version_info[0] < 3
 
 try:
     reload
@@ -73,7 +75,6 @@ from distutils.command.build_ext import build_ext
 from IPython.core import display
 from IPython.core import magic_arguments
 from IPython.core.magic import Magics, magics_class, cell_magic
-from IPython.utils import py3compat
 try:
     from IPython.paths import get_ipython_cache_dir
 except ImportError:
@@ -101,6 +102,14 @@ PGO_CONFIG = {
 PGO_CONFIG['mingw32'] = PGO_CONFIG['gcc']
 
 
+if IS_PY2:
+    def encode_fs(name):
+        return name if isinstance(name, bytes) else name.encode(IO_ENCODING)
+else:
+    def encode_fs(name):
+        return name
+
+
 @magics_class
 class CythonMagics(Magics):
 
@@ -306,7 +315,7 @@ class CythonMagics(Magics):
             key += (time.time(),)
 
         if args.name:
-            module_name = py3compat.unicode_to_str(args.name)
+            module_name = str(args.name)  # no-op in Py3
         else:
             module_name = "_cython_magic_" + hashlib.md5(str(key).encode('utf-8')).hexdigest()
         html_file = os.path.join(lib_dir, module_name + '.html')
@@ -406,7 +415,7 @@ class CythonMagics(Magics):
 
     def _cythonize(self, module_name, code, lib_dir, args, quiet=True):
         pyx_file = os.path.join(lib_dir, module_name + '.pyx')
-        pyx_file = py3compat.cast_bytes_py2(pyx_file, encoding=sys.getfilesystemencoding())
+        pyx_file = encode_fs(pyx_file)
 
         c_include_dirs = args.include
         c_src_files = list(map(str, args.src))
@@ -526,10 +535,10 @@ class CythonMagics(Magics):
         build_extension = _build_ext(dist)
         build_extension.finalize_options()
         if temp_dir:
-            temp_dir = py3compat.cast_bytes_py2(temp_dir, encoding=sys.getfilesystemencoding())
+            temp_dir = encode_fs(temp_dir)
             build_extension.build_temp = temp_dir
         if lib_dir:
-            lib_dir = py3compat.cast_bytes_py2(lib_dir, encoding=sys.getfilesystemencoding())
+            lib_dir = encode_fs(lib_dir)
             build_extension.build_lib = lib_dir
         if extension is not None:
             build_extension.extensions = [extension]