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harpone / Tensorflow_py_func_with_grad.py

Last active August 1, 2023 00:59

	import tensorflow as tf
	from tensorflow.python.framework import ops
	import numpy as np

	# Define custom py_func which takes also a grad op as argument:
	def py_func(func, inp, Tout, stateful=True, name=None, grad=None):

	# Need to generate a unique name to avoid duplicates:
	rnd_name = 'PyFuncGrad' + str(np.random.randint(0, 1E+8))

geggo / LM.py

Created March 9, 2015 17:27

	#!/usr/bin/python
	#-- coding: latin-1 --
	"""This module contains pure Python implementations of the
	Levenberg-Marquardt algorithm for data fitting.
	"""

	import numpy

	from numpy import inner, max, diag, eye, Inf, dot
	from numpy.linalg import norm, solve

perrygeo / zonal_stats.py

Last active August 18, 2025 08:33

Python implementation of zonal statistics function. Optimized for dense polygon layers, uses numpy, GDAL and OGR to rival the speed of starspan.