31 lines
1.1 KiB
Python
31 lines
1.1 KiB
Python
"""Test possibility of patching fftpack with pyfftw.
|
|
|
|
No module source outside of scipy.fftpack should contain an import of
|
|
the form `from scipy.fftpack import ...`, so that a simple replacement
|
|
of scipy.fftpack by the corresponding fftw interface completely swaps
|
|
the two FFT implementations.
|
|
|
|
Because this simply inspects source files, we only need to run the test
|
|
on one version of Python.
|
|
"""
|
|
|
|
|
|
from pathlib import Path
|
|
import re
|
|
import tokenize
|
|
from numpy.testing import assert_
|
|
import scipy
|
|
|
|
class TestFFTPackImport(object):
|
|
def test_fftpack_import(self):
|
|
base = Path(scipy.__file__).parent
|
|
regexp = r"\s*from.+\.fftpack import .*\n"
|
|
for path in base.rglob("*.py"):
|
|
if base / "fftpack" in path.parents:
|
|
continue
|
|
# use tokenize to auto-detect encoding on systems where no
|
|
# default encoding is defined (e.g., LANG='C')
|
|
with tokenize.open(str(path)) as file:
|
|
assert_(all(not re.fullmatch(regexp, line)
|
|
for line in file),
|
|
"{0} contains an import from fftpack".format(path))
|