def get_cachedir_csig(self):
        try:
            return self.cachedir_csig
        except AttributeError:
            pass

        cachedir, cachefile = self.get_build_env().get_CacheDir().cachepath(self)
        if not self.exists() and cachefile and os.path.exists(cachefile):
            self.cachedir_csig = SCons.Util.MD5filesignature(cachefile, \
                SCons.Node.FS.File.md5_chunksize * 1024)
        else:
            self.cachedir_csig = self.get_csig()
        return self.cachedir_csig
Compute the largest rate of change in the observed data.
dataset/ETHPy150Open kayhayen/Nuitka/nuitka/build/inline_copy/lib/scons-2.3.2/SCons/Node/FS.py/File.get_cachedir_csig--crossover with--dataset/ETHPy150Open cesium-ml/cesium/cesium/science_features/common_functions.py/max_slope