--- sympy-sympy-1.4/sympy/utilities/autowrap.py.orig	2019-04-09 18:29:25.000000000 -0600

+++ sympy-sympy-1.4/sympy/utilities/autowrap.py	2019-04-17 14:34:26.580374579 -0600

@@ -229,6 +229,8 @@ except ImportError:

     from distutils.extension import Extension

 from Cython.Build import cythonize

 cy_opts = {cythonize_options}

+if 'language_level' not in cy_opts or cy_opts['language_level'] == None:

+    cy_opts['language_level'] = 3

 {np_import}

 ext_mods = [Extension(

     {ext_args},

--- sympy-sympy-1.4/sympy/utilities/_compilation/compilation.py.orig	2019-04-09 18:29:25.000000000 -0600

+++ sympy-sympy-1.4/sympy/utilities/_compilation/compilation.py	2019-04-17 14:34:26.581374576 -0600

@@ -291,6 +291,8 @@ def simple_cythonize(src, destdir=None,

     try:

         cy_options = CompilationOptions(default_options)

         cy_options.__dict__.update(cy_kwargs)

+        if cy_options.__dict__['language_level'] == None:

+            cy_options.__dict__['language_level'] = 3

         cy_result = cy_compile([src], cy_options)

         if cy_result.num_errors > 0:

             raise ValueError("Cython compilation failed.")

--- sympy-sympy-1.4/sympy/utilities/tests/test_autowrap.py.orig	2019-04-09 18:29:25.000000000 -0600

+++ sympy-sympy-1.4/sympy/utilities/tests/test_autowrap.py	2019-04-17 14:34:26.581374576 -0600

@@ -100,6 +100,8 @@ except ImportError:

     from distutils.extension import Extension

 from Cython.Build import cythonize

 cy_opts = {}

+if 'language_level' not in cy_opts or cy_opts['language_level'] == None:

+    cy_opts['language_level'] = 3

 ext_mods = [Extension(

     'wrapper_module_%(num)s', ['wrapper_module_%(num)s.pyx', 'wrapped_code_%(num)s.c'],

@@ -138,6 +140,8 @@ except ImportError:

     from distutils.extension import Extension

 from Cython.Build import cythonize

 cy_opts = {'compiler_directives': {'boundscheck': False}}

+if 'language_level' not in cy_opts or cy_opts['language_level'] == None:

+    cy_opts['language_level'] = 3

 ext_mods = [Extension(

     'wrapper_module_%(num)s', ['wrapper_module_%(num)s.pyx', 'wrapped_code_%(num)s.c'],

@@ -164,6 +168,8 @@ except ImportError:

     from distutils.extension import Extension

 from Cython.Build import cythonize

 cy_opts = {'compiler_directives': {'boundscheck': False}}

+if 'language_level' not in cy_opts or cy_opts['language_level'] == None:

+    cy_opts['language_level'] = 3

 import numpy as np

 ext_mods = [Extension(