大家好,我正在尝试使用 numba.njit
装饰器,在这个 最小工作示例
中进行 离散傅里叶变换(discrete Fourier transform)
:
import numba
import numpy as np
import scipy
import scipy.fftpack
@numba.njit
def main():
wave = [[[0.09254795, 0.10001078, 0.10744892, 0.07755555, 0.08506225, 0.09254795],
[0.09907245, 0.10706145, 0.11502401, 0.08302302, 0.09105898, 0.09907245],
[0.09565098, 0.10336405, 0.11105158, 0.08015589, 0.08791429, 0.09565098],
[0.00181467, 0.001961, 0.00210684, 0.0015207, 0.00166789, 0.00181467]],
[[-0.45816267, - 0.46058367, - 0.46289091, - 0.45298182, - 0.45562851, -0.45816267],
[-0.49046506, - 0.49305676, - 0.49552669, - 0.48491893, - 0.48775223, -0.49046506],
[-0.47352483, - 0.47602701, - 0.47841162, - 0.46817027, - 0.4709057, -0.47352483],
[-0.00898358, - 0.00903105, - 0.00907629, - 0.008882, - 0.00893389, -0.00898358]],
[[0.36561472, 0.36057289, 0.355442, 0.37542627, 0.37056626, 0.36561472],
[0.39139261, 0.38599531, 0.38050268, 0.40189591, 0.39669325, 0.39139261],
[0.37787385, 0.37266296, 0.36736003, 0.38801438, 0.38299141, 0.37787385],
[0.00716892, 0.00707006, 0.00696945, 0.0073613, 0.00726601, 0.00716892]]]
new_fft = scipy.fftpack.fft(wave)
if __name__ == '__main__':
main()
输出:
C:\Users\Artur\Anaconda\python.exe C:/Users/Artur/Desktop/RL_framework/help_functions/test2.py
Traceback (most recent call last):
File "C:/Users/Artur/Desktop/RL_framework/help_functions/test2.py", line 25, in <module>
main()
File "C:\Users\Artur\Anaconda\lib\site-packages\numba\core\dispatcher.py", line 401, in _compile_for_args
error_rewrite(e, 'typing')
File "C:\Users\Artur\Anaconda\lib\site-packages\numba\core\dispatcher.py", line 344, in error_rewrite
reraise(type(e), e, None)
File "C:\Users\Artur\Anaconda\lib\site-packages\numba\core\utils.py", line 80, in reraise
raise value.with_traceback(tb)
numba.core.errors.TypingError: Failed in nopython mode pipeline (step: nopython frontend)
Unknown attribute 'fft' of type Module(<module 'scipy.fftpack' from 'C:\\Users\\Artur\\Anaconda\\lib\\site-packages\\scipy\\fftpack\\__init__.py'>)
File "test2.py", line 21:
def main():
<source elided>
new_fft = scipy.fftpack.fft(wave)
^
[1] During: typing of get attribute at C:/Users/Artur/Desktop/RL_framework/help_functions/test2.py (21)
File "test2.py", line 21:
def main():
<source elided>
new_fft = scipy.fftpack.fft(wave)
^
Process finished with exit code 1
不幸的是,scipy.fftpack.fft
看起来是一个已经被淘汰的函数,不受 numba
支持。因此我寻找替代方案。我找到了两个:
1. scipy.fft(wave)
是上述淘汰函数的更新版本。它会产生以下错误输出:
C:\Users\Artur\Anaconda\python.exe C:/Users/Artur/Desktop/RL_framework/help_functions/test2.py
Traceback (most recent call last):
File "C:/Users/Artur/Desktop/RL_framework/help_functions/test2.py", line 25, in <module>
main()
File "C:\Users\Artur\Anaconda\lib\site-packages\numba\core\dispatcher.py", line 401, in _compile_for_args
error_rewrite(e, 'typing')
File "C:\Users\Artur\Anaconda\lib\site-packages\numba\core\dispatcher.py", line 344, in error_rewrite
reraise(type(e), e, None)
File "C:\Users\Artur\Anaconda\lib\site-packages\numba\core\utils.py", line 80, in reraise
raise value.with_traceback(tb)
numba.core.errors.TypingError: Failed in nopython mode pipeline (step: nopython frontend)
Invalid use of Module(<module 'scipy.fft' from 'C:\\Users\\Artur\\Anaconda\\lib\\site-packages\\scipy\\fft\\__init__.py'>) with parameters (list(list(list(float64))))
No type info available for Module(<module 'scipy.fft' from 'C:\\Users\\Artur\\Anaconda\\lib\\site-packages\\scipy\\fft\\__init__.py'>) as a callable.
[1] During: resolving callee type: Module(<module 'scipy.fft' from 'C:\\Users\\Artur\\Anaconda\\lib\\site-packages\\scipy\\fft\\__init__.py'>)
[2] During: typing of call at C:/Users/Artur/Desktop/RL_framework/help_functions/test2.py (21)
File "test2.py", line 21:
def main():
<source elided>
new_fft = scipy.fft(wave)
^
Process finished with exit code 1
2. np.fft.fft(wave)
似乎被支持,但也会产生错误:
C:\Users\Artur\Anaconda\python.exe C:/Users/Artur/Desktop/RL_framework/help_functions/test2.py
Traceback (most recent call last):
File "C:/Users/Artur/Desktop/RL_framework/help_functions/test2.py", line 25, in <module>
main()
File "C:\Users\Artur\Anaconda\lib\site-packages\numba\core\dispatcher.py", line 401, in _compile_for_args
error_rewrite(e, 'typing')
File "C:\Users\Artur\Anaconda\lib\site-packages\numba\core\dispatcher.py", line 344, in error_rewrite
reraise(type(e), e, None)
File "C:\Users\Artur\Anaconda\lib\site-packages\numba\core\utils.py", line 80, in reraise
raise value.with_traceback(tb)
numba.core.errors.TypingError: Failed in nopython mode pipeline (step: nopython frontend)
Unknown attribute 'fft' of type Module(<module 'numpy.fft' from 'C:\\Users\\Artur\\Anaconda\\lib\\site-packages\\numpy\\fft\\__init__.py'>)
File "test2.py", line 21:
def main():
<source elided>
new_fft = np.fft.fft(wave)
^
[1] During: typing of get attribute at C:/Users/Artur/Desktop/RL_framework/help_functions/test2.py (21)
File "test2.py", line 21:
def main():
<source elided>
new_fft = np.fft.fft(wave)
^
Process finished with exit code 1
你是否了解一种与 numba.njit
装饰器配合使用的 fft
函数?
scipy.fft.fft
是一个非常快的实现,你真的需要 JIT 吗? - tstanislpyculib.fft
应该得到支持。https://devblogs.nvidia.com/seven-things-numba/ - norok2pyculib
,但在 PyCharm 中似乎无法工作,至少我无法让它工作。我已经发布了一个帖子:https://stackoverflow.com/questions/62360236/how-to-import-pyculib-in-pycharm - Artur Müller Romanov