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--- sympy-sympy-1.4/sympy/utilities/autowrap.py.orig	2019-04-09 18:29:25.000000000 -0600
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+++ sympy-sympy-1.4/sympy/utilities/autowrap.py	2019-04-17 14:34:26.580374579 -0600
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@@ -229,6 +229,8 @@ except ImportError:
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     from distutils.extension import Extension
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 from Cython.Build import cythonize
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 cy_opts = {cythonize_options}
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+if 'language_level' not in cy_opts or cy_opts['language_level'] == None:
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+    cy_opts['language_level'] = 3
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 {np_import}
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 ext_mods = [Extension(
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     {ext_args},
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--- sympy-sympy-1.4/sympy/utilities/_compilation/compilation.py.orig	2019-04-09 18:29:25.000000000 -0600
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+++ sympy-sympy-1.4/sympy/utilities/_compilation/compilation.py	2019-04-17 14:34:26.581374576 -0600
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@@ -291,6 +291,8 @@ def simple_cythonize(src, destdir=None,
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     try:
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         cy_options = CompilationOptions(default_options)
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         cy_options.__dict__.update(cy_kwargs)
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+        if cy_options.__dict__['language_level'] == None:
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+            cy_options.__dict__['language_level'] = 3
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         cy_result = cy_compile([src], cy_options)
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         if cy_result.num_errors > 0:
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             raise ValueError("Cython compilation failed.")
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--- sympy-sympy-1.4/sympy/utilities/tests/test_autowrap.py.orig	2019-04-09 18:29:25.000000000 -0600
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+++ sympy-sympy-1.4/sympy/utilities/tests/test_autowrap.py	2019-04-17 14:34:26.581374576 -0600
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@@ -100,6 +100,8 @@ except ImportError:
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     from distutils.extension import Extension
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 from Cython.Build import cythonize
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 cy_opts = {}
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+if 'language_level' not in cy_opts or cy_opts['language_level'] == None:
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+    cy_opts['language_level'] = 3
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 ext_mods = [Extension(
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     'wrapper_module_%(num)s', ['wrapper_module_%(num)s.pyx', 'wrapped_code_%(num)s.c'],
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@@ -138,6 +140,8 @@ except ImportError:
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     from distutils.extension import Extension
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 from Cython.Build import cythonize
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 cy_opts = {'compiler_directives': {'boundscheck': False}}
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+if 'language_level' not in cy_opts or cy_opts['language_level'] == None:
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+    cy_opts['language_level'] = 3
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 ext_mods = [Extension(
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     'wrapper_module_%(num)s', ['wrapper_module_%(num)s.pyx', 'wrapped_code_%(num)s.c'],
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@@ -164,6 +168,8 @@ except ImportError:
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     from distutils.extension import Extension
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 from Cython.Build import cythonize
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 cy_opts = {'compiler_directives': {'boundscheck': False}}
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+if 'language_level' not in cy_opts or cy_opts['language_level'] == None:
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+    cy_opts['language_level'] = 3
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 import numpy as np
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 ext_mods = [Extension(