def extensions():
import numpy<EOL>from Cython.Build import cythonize<EOL>ext = [<EOL>Extension('<STR_LIT>', ['<STR_LIT>'],<EOL>include_dirs=[numpy.get_include()],<EOL>extra_compile_args=['<STR_LIT>']),<EOL>]      <EOL>return cythonize(ext)<EOL>
Returns list of `cython` extensions for `lazy_cythonize`.