which function can do fft?the help information as below?but none can do fft...........

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help(fftpack)Help on module scitbx.fftpack in scitbx: NAME scitbx.fftpack FILE f:\foryou\桌面\fft\cctbx\cctbx_sources\scitbx\scitbx\fftpack.py FUNCTIONS adjust_gridding(...) C++ signature: adjust_gridding(int, int) -> int C++ signature: adjust_gridding(int, int, int) -> int adjust_gridding_triple(...) C++ signature: adjust_gridding_triple(class scitbx::af::small, int) -> class scitbx::af::small C++ signature: adjust_gridding_triple(class scitbx::af::small, int, classscitbx::af::small) -> class scitbx::af::small-- Hi , I'm Earth-Man.你好，我是地球人。 欢迎访问我的博客:http://zsp.javaeye.com/ --张沈鹏