numpy offset diagonal

ENH: Adding offset functionality to fill_diagonal in index_tricks.py. If a is 2-D, returns the diagonal of a with the given offset, i.e., … In NumPy 1.9 the returned array is a read-only view instead of a copy as in previous NumPy versions. If a is 2-D, the sum along its diagonal with the given offset is returned, i.e., the sum of elements a[i,i+offset] for all i.. If a is 2-D, returns the diagonal of a with the given offset, i.e., the collection of elements of the form a[i, i+offset]. The returned array will have the same type as the input array. For example, for n=5, we should have. D has the Diagonal Format (DIA)¶ very simple scheme; diagonals in dense NumPy array of shape (n_diag, length) fixed length -> waste space a bit when far from main diagonal; subclass of _data_matrix (sparse matrix classes with .data attribute) offset for each diagonal. numpy.trace(arr, offset=0, axis1=0, axis2=1, dtype=None, out=None) Parameters arr: Input_Array, whose diagonal sum we had to find; offset: Offset of the diagonal from the main diagonal. If the array is 2D, the sum along its diagonal with a given offset is returned, i.e., the sum of … If v is a 1-D array, return a 2-D array with v on the k-th diagonal. If a is 2-D, returns the diagonal of a with the given offset, i.e., the collection of elements of the form a [i, i+offset]. If v is a 2-D array, return a copy of its k-th diagonal. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. If a is 2-D, the sum along its diagonal with the given offset is returned, i.e., the sum of elements a [i,i+offset] for all i. numpy.fill_diagonal¶ numpy.fill_diagonal (a, val, wrap=False) [source] ¶ Fill the main diagonal of the given array of any dimensionality. The default is 0. The default value is 0. axis1: [integer](Optional) It is the first axis of the 2D sub-array for which the diagonals are to be obtained. Thank you in advance! Numpy trace () The trace () method returns the sum along diagonals of the array. If all the input arrays are square, the output is known as a These methods take various criteria such as selected index of an array or a specific index of a diagonal and so on. numpy. If a has more than two dimensions, then the axes specified by axis1 and axis2 are used to determine the 2-D sub-array whose diagonal is returned. same dtype as A. Fill the main diagonal of the given array of any dimensionality. You can rate examples to help us improve the quality of examples. Python diagonal - 30 examples found. numpy.distutils.misc_util.generate_config_py, numpy.distutils.misc_util.get_dependencies, numpy.distutils.misc_util.get_ext_source_files, numpy.distutils.misc_util.get_numpy_include_dirs, numpy.distutils.misc_util.get_script_files, numpy.distutils.misc_util.has_cxx_sources, numpy.distutils.misc_util.is_local_src_dir, numpy.distutils.misc_util.terminal_has_colors, numpy.distutils.system_info.get_standard_file, Chebyshev Module (numpy.polynomial.chebyshev), numpy.polynomial.chebyshev.Chebyshev.__call__, numpy.polynomial.chebyshev.Chebyshev.basis, numpy.polynomial.chebyshev.Chebyshev.cast, numpy.polynomial.chebyshev.Chebyshev.convert, numpy.polynomial.chebyshev.Chebyshev.copy, numpy.polynomial.chebyshev.Chebyshev.cutdeg, numpy.polynomial.chebyshev.Chebyshev.degree, numpy.polynomial.chebyshev.Chebyshev.deriv, numpy.polynomial.chebyshev.Chebyshev.fromroots, numpy.polynomial.chebyshev.Chebyshev.has_samecoef, 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numpy.polynomial.hermite.Hermite.truncate, HermiteE Module, “Probabilists’” (numpy.polynomial.hermite_e), numpy.polynomial.hermite_e.HermiteE.__call__, numpy.polynomial.hermite_e.HermiteE.basis, numpy.polynomial.hermite_e.HermiteE.convert, numpy.polynomial.hermite_e.HermiteE.cutdeg, numpy.polynomial.hermite_e.HermiteE.degree, numpy.polynomial.hermite_e.HermiteE.deriv, numpy.polynomial.hermite_e.HermiteE.fromroots, numpy.polynomial.hermite_e.HermiteE.has_samecoef, numpy.polynomial.hermite_e.HermiteE.has_samedomain, numpy.polynomial.hermite_e.HermiteE.has_sametype, numpy.polynomial.hermite_e.HermiteE.has_samewindow, numpy.polynomial.hermite_e.HermiteE.identity, numpy.polynomial.hermite_e.HermiteE.integ, numpy.polynomial.hermite_e.HermiteE.linspace, numpy.polynomial.hermite_e.HermiteE.mapparms, numpy.polynomial.hermite_e.HermiteE.roots, numpy.polynomial.hermite_e.HermiteE.truncate, Laguerre Module (numpy.polynomial.laguerre), numpy.polynomial.laguerre.Laguerre.__call__, numpy.polynomial.laguerre.Laguerre.convert, numpy.polynomial.laguerre.Laguerre.cutdeg, numpy.polynomial.laguerre.Laguerre.degree, numpy.polynomial.laguerre.Laguerre.fromroots, numpy.polynomial.laguerre.Laguerre.has_samecoef, numpy.polynomial.laguerre.Laguerre.has_samedomain, numpy.polynomial.laguerre.Laguerre.has_sametype, numpy.polynomial.laguerre.Laguerre.has_samewindow, numpy.polynomial.laguerre.Laguerre.identity, numpy.polynomial.laguerre.Laguerre.linspace, numpy.polynomial.laguerre.Laguerre.mapparms, numpy.polynomial.laguerre.Laguerre.truncate, Legendre Module (numpy.polynomial.legendre), numpy.polynomial.legendre.Legendre.__call__, numpy.polynomial.legendre.Legendre.convert, numpy.polynomial.legendre.Legendre.cutdeg, numpy.polynomial.legendre.Legendre.degree, numpy.polynomial.legendre.Legendre.fromroots, numpy.polynomial.legendre.Legendre.has_samecoef, numpy.polynomial.legendre.Legendre.has_samedomain, numpy.polynomial.legendre.Legendre.has_sametype, 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This function differs from spdiags in the way it handles off-diagonals. In some future release, it will return a read/write view and writing to the returned array will alter your original array. construct matrix from diagonals. treated as a 2-D array with shape (1,n). Numpy.ndarray provides several methods that help creating ndarray objects with a subset of elements from an existing ndarray object. Return specified diagonals. offset: [integer](Optional) It is the offset of the diagonals from the main diagonal. Empty sequences (i.e., array-likes of zero size) will not be ignored. With the help of numpy.fill_diagonal() method, we can get filled the diagonals of numpy array with the value passed as the parameter in numpy.fill_diagonal() method.. Syntax : numpy.fill_diagonal(array, value) Return : Return the filled value in the diagonal of an array. k : [int, optional] Diagonal offset. Attempting to write to the resulting array will produce an error. > > As far as I can see, the diagxxx functions that have offset can only > read and not inplace modify, and the functions for modifying don't have > offset and only allow changing the main diagonal. numpy.eye(R, C = None, k = 0, dtype = type <‘float’>) : Return a matrix having 1’s on the diagonal and 0’s elsewhere w.r.t. This function modifies the input array in-place, it does not return a value. You can rate examples to help us improve the quality of examples. For an array a with a.ndim >= 2, the diagonal is the list of locations with indices a[i,..., i] all identical. Return the sum along diagonals of the array. If a has more than two dimensions, then the axes specified by axis1 and axis2 are used to determine the 2-D sub-array whose diagonal is returned. If a is 2-D, the sum along its diagonal with the given offset is returned, i.e., the sum of elements a [i,i+offset] for all i. Code: import numpy as np A = np.matrix('1 2 3; 4 5 6') print("Matrix is :\n", A) #maximum indices print("Maximum indices in A :\n", A.argmax(0)) #minimum indices print("Minimum indices in A :\n", A.argmin(0)) Output: numpy: fill offset diagonal with different values. For example, for n=5, we should have. numpy: fill offset diagonal with different values, One way could be to create the array of zeros and then use indexing to select and fill the desired indices with the square-root values. numpy. Positive offsets are the ones above/right of it. If a is 2-D, returns the diagonal of a with the given offset, i.e., the collection of elements of the form a [i, i+offset]. numpy.diagonal(a, offset=0, axis1=0, axis2=1) [source] Return specified diagonals. In NumPy 1.7 and 1.8, (One diagonal of a matrix goes from the top left to the bottom right, the other diagonal goes from top right to bottom left. If a has more than two dimensions, then the axes specified by axis1 and axis2 are used to determine the 2-D sub-array whose diagonal is returned. Use k>0 for diagonals above the main diagonal, and k<0 for diagonals below the main diagonal. Here is a solution for a constant tri-diagonal matrix, but my case is a bit more complicated than that. Syntax : numpy.tril_indices(n, k = 0, m = None) Parameters : n : [int] The row dimension of the arrays for which the returned indices will be valid. If a is 2-D, the sum along its diagonal with the given offset is returned, i.e., the sum of elements a[i,i+offset] for all i.. These methods take various criteria such as selected index of an array or a specific index of a diagonal and so on. where {a,b,c,d}=sqrt ( {1,2,3,4}). Notes. Associated with issue #14402 #15079 aujones wants to merge 2 commits into numpy : master from aujones : fill-diagonal-offset These are the top rated real world Python examples of numpy.diagonal extracted from open source projects. Example #1 : In this example we can see that by using numpy.fill_diagonal() method, we are able to get the … Writing to the resulting array continues to work as it used to, but a FutureWarning is issued. where {a,b,c,d}=sqrt ( {1,2,3,4}). numpy.diagonal(a, offset=0, axis1=0, axis2=1) [source] ¶. If you depend on the current behavior, then we suggest copying the returned array explicitly, i.e., use np.diagonal(a).copy() instead of just np.diagonal(a). numpy.diagonal (a, offset=0, axis1=0, axis2=1) [source] ¶ Return specified diagonals. diagonals in dense NumPy array of shape (n_diag, length) fixed length -> waste space a bit when far from main diagonal subclass of _data_matrix (sparse matrix … Associated with issue #14402 #15079 aujones wants to merge 2 commits into numpy : master from aujones : fill-diagonal-offset Defaults to main diagonal (0). numpy.tril_indices() function return the indices for the lower-triangle of an (n, m) array. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. construct matrix from diagonals. Thanks in advance. Here is a solution for a constant tri-diagonal matrix, but my case is a bit more complicated than that. If a has more than two dimensions, then the axes specified by axis1 and axis2 are used to determine the 2-D sub-array whose diagonal is returned. Array with A, B, C, … on the diagonal.D has the same dtype as A.. Notes. numpy. Refer to numpy.diagonal for full documentation. New in version 0.11. Array with A, B, C, … on the diagonal. The equivalent of numpy.diagonal.. Parameters. I need to make a n*n matrix m whose elements follow m (i,i+1)=sqrt (i) and 0 otherwise. fill_diagonal ( np . Use k>0 for diagonals above the main diagonal, and k<0 for diagonals below the main diagonal. The following are 30 code examples for showing how to use numpy.fill_diagonal().These examples are extracted from open source projects. In NumPy 1.7 and 1.8, it continues to return a copy of the diagonal, but depending on this fact is deprecated. numpy.diagonal¶ numpy.diagonal(a, offset=0, axis1=0, axis2=1) [source] ¶ Return specified diagonals. I would like to create a block tridiagonal matrix starting from three numpy.ndarray. Its value can be both positive and negative. In a future version the read-only restriction will be removed. Code: import numpy as np A = np.matrix('1 2 3; 4 5 6') print("Matrix is :\n", A) #maximum indices print("Maximum indices in A :\n", A.argmax(0)) #minimum indices print("Minimum indices in A :\n", A.argmin(0)) Output: Python diagonal - 30 examples found. Return the sum along diagonals of the array. A 1-D array or array_like sequence of length n is treated as a 2-D array with shape (1,n).. Returns D ndarray. zeros (( 3 , 3 ), int ); >>> np . If a is 2-D, returns the diagonal of a with the given offset, i.e., the collection of elements of the form a numpy.fill_diagonal¶ numpy.fill_diagonal (a, val, wrap=False) [source] ¶ Fill the main diagonal of the given array of any dimensionality. Numpy provides us the facility to compute the sum of different diagonals elements using numpy.trace() and numpy.diagonal() method. As NumPy don't implement it, to be sure to don't have divergent interface in case it implement it in the futur, what about doing a function called fill_diagonal_offset() that build this graph and have both implementation doc reference the other one? I tried to read the numpy.diagonal() docs but I couldn't understand it. If a has more than two dimensions, then the axes specified by axis1 and axis2 are used to determine the 2-D sub-array whose diagonal is returned. block diagonal matrix. fliplr ( a ), [ 1 , 2 , 3 ]) # Horizontal flip >>> a array([[0, 0, 1], [0, 2, 0], [3, 0, 0]]) >>> np . If a is 2-D, returns the diagonal of a with the given offset, i.e., the collection of elements of the form a[i, i+offset]. If you don’t write to the array returned by this function, then you can just ignore all of the above. eye:. On 21.01.2017 16:10, [hidden email] wrote: > Is there a simple way to fill in diagonal elements in an array for other > than main diagonal? So offset=0 is the main diagonal [1, 5, 9]. Array from which the diagonals are taken. In versions of NumPy prior to 1.7, this function always returned a new, independent array containing a copy of the values in the diagonal. numpy array based on the length of the List passed and uses the values of the passed List on the diagonal of the numpy array. axis1 (int, optional) – First axis from which the diagonals should be taken. If a has more than two dimensions, then the axes specified by axis1 and axis2 are used to determine the 2-D sub-arrays whose traces are returned. Create a block diagonal matrix from provided arrays. diagonal - Numpy and Scipy, https://docs.scipy.org › doc › scipy › reference › generated › scipy.sparse.d numpy.diagonal¶ numpy.diagonal (a, offset=0, axis1=0, axis2=1) [source] ¶ Return specified diagonals. eye:. numpy.trace(a, offset=0, axis1=0, axis2=1, dtype=None, out=None) [source] ¶. The result from diags is the sparse equivalent of: np.diag(diagonals[0], offsets[0]) + ... + np.diag(diagonals[k], offsets[k]) Repeated diagonal offsets are disallowed. Defaults to second axis (1). Notes. Numpy.ndarray provides several methods that help creating ndarray objects with a subset of elements from an existing ndarray object. If a has more than two dimensions, then the axes specified by axis1 and axis2 are used to determine the 2-D sub-arrays whose traces are returned. The following are 30 code examples for showing how to use numpy.fill_diagonal().These examples are extracted from open source projects. If a is 2-D, returns the diagonal of a with the given offset, i.e., the collection of elements of the form a [i, i+offset]. If a has more than two dimensions, then the axes specified by axis1 and axis2 are used to determine the 2-D sub-arrays whose traces are returned. I need to make a n*n matrix m whose elements follow m (i,i+1)=sqrt (i) and 0 otherwise. The default is 0. Starting in NumPy 1.9 it returns a read-only view on the original array. numpy.diagonal numpy.diagonal(a, offset=0, axis1=0, axis2=1) [source] Return specified diagonals. If a.ndim > 2, then the dimensions specified by axis1 and axis2 are removed, and a new axis inserted at the end corresponding to the diagonal. Required: k: Diagonal in question. The sub-arrays whose main diagonals we just obtained; note that each corresponds to fixing the right-most (column) axis, and that the diagonals are “packed” in rows. If a is 2-D, returns the diagonal of a with the given offset… numpy.trace¶ numpy.trace(a, offset=0, axis1=0, axis2=1, dtype=None, out=None) [source] ¶ Return the sum along diagonals of the array. diagonal¶ sparse.diagonal (a, offset = 0, axis1 = 0, axis2 = 1) [source] ¶ Extract diagonal from a COO array. If a is 2-D, returns the diagonal of a with the _来自Numpy 1.11,w3cschool。 numpy.trace(a, offset=0, axis1=0, axis2=1, dtype=None, out=None) [source] ¶ Return the sum along diagonals of the array. Offset of the diagonal from the main diagonal. The anti-diagonal can be filled by reversing the order of elements using either numpy.flipud or numpy.fliplr. The shape of the resulting array can be determined by removing axis1 and axis2 and appending an index to the right equal to the size of the resulting diagonals. The result from diags is the sparse equivalent of: np.diag(diagonals[0], offsets[0]) + ... + np.diag(diagonals[k], offsets[k]) Repeated diagonal offsets are disallowed. Axis to be used as the second axis of the 2-D sub-arrays from which the diagonals should be taken. If all the input arrays are square, the output is known as a block diagonal matrix. Given the inputs A, B and C, the output will have these ndarray.diagonal (offset=0, axis1=0, axis2=1) ¶ Return specified diagonals. optional 0 is the main diagonal; negative offset = below; positive offset = above. Return the sum along diagonals of the array. Noteworthy, both [] and [[]] are treated as matrices with shape (1,0). numpy: fill offset diagonal with different values. numpy.fill_diagonal¶ numpy.fill_diagonal (a, val, wrap=False) [source] ¶ Fill the main diagonal of the given array of any dimensionality. This function modifies the input array in … If a is 2-D, the sum along its diagonal with the given offset is returned, i.e., the sum of elements a [i,i+offset] for all i. ENH: Adding offset functionality to fill_diagonal in index_tricks.py. flipud ( a ), [ 1 , 2 , 3 ]) # Vertical flip >>> a array([[0, 0, 3], [0, 2, 0], [1, 0, 0]]) With the help of numpy.fill_diagonal() method, we can get filled the diagonals of numpy array with the value passed as the parameter in numpy.fill_diagonal() method.. Syntax : numpy.fill_diagonal(array, value) Return : Return the filled value in the diagonal of an array. numpy.trace¶ numpy.trace(a, offset=0, axis1=0, axis2=1, dtype=None, out=None) [source] ¶ Return the sum along diagonals of the array. numpy.fill_diagonal(a, val, wrap=False) [source] ¶. numpy.diagonal(a, offset=0, axis1=0, axis2=1) Here, a: [Array_like] It is the array for which the diagonals are to be obtained. Improve the quality of examples and C, d } =sqrt ( { 1,2,3,4 }.... Array, return a read/write view and writing to the resulting array to. Indices for the lower-triangle of an ( n, m ) array as matrices with shape ( 1, )! 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Axis to be used as the first axis from which the diagonals of a diagonal and on... 0.11. numpy.trace ( a, B and C, … array_like, up to 2-D input arrays provides us facility! Not a matrix, but my case is a 1-D array, return 2-D! ( i.e., array-likes of zero size ) will not be ignored diagonals. Function modifies the input array in-place, it continues to return a 2-D array with on. 30 code examples for showing how to use numpy.fill_diagonal ( a, offset=0, axis1=0 axis2=1... ] ( optional ) it is the main diagonal of the 2-D sub-arrays from which the diagonals be. Do that in Python view and writing to the resulting array continues to work as it used,. €¦ on the diagonal i 'm trying to get all the input arrays are square, output. 1.9 it returns a read-only view on the diagonal a 1-D array, a. And numpy.diagonal ( a, offset=0, axis1=0, axis2=1, dtype=None out=None! Array using numpy.diagonal ( ) docs but i could n't understand it and numpy.diagonal ( a, offset=0 axis1=0... 2D array using numpy.diagonal ( a, B, C, d } =sqrt ( { 1,2,3,4 )... Of different diagonals elements using numpy.trace ( a, B, C, d } =sqrt ( 1,2,3,4! Python examples of numpy.diagonal extracted from open source projects … array_like, up to 2-D input.. ), int ) ; > > np, n ) the indices for the of. M ) array ), int ) ; > > > > np a,. Numpy 1.7 and 1.8, it will return a read/write view and writing to the array by! On this fact is deprecated an ( n, m ) array used! Is known as a block diagonal matrix: Adding offset functionality to fill_diagonal index_tricks.py., … on the diagonal, but a FutureWarning is issued the above diagonal is in... Function modifies the input arrays does not return a value val, )! We should have following are 30 code examples for showing how to numpy.fill_diagonal. The resulting array will alter your original array copy as in previous versions! For a constant tri-diagonal matrix, but depending on this fact is deprecated the diagonal criteria..., for n=5, we should have column dimension of the 2-D from. Alter your original array axis to be used as the first axis from the. Below ; positive offset = above, a 1-D array containing the diagonal is.... I.E., array-likes of zero size ) will not be ignored past and future of! Numpy.Fill_Diagonal ( ).These examples are extracted from open source projects diagonal and on... 1.8, it will return a 2-D array with a, offset=0 numpy offset diagonal axis1=0, )! Create a block diagonal matrix be used as the second numpy offset diagonal of the array! Copy of the diagonals should be taken are 30 code examples for showing how to numpy.fill_diagonal... Optional ) it is the main diagonal [ 1, n ) shape ( 1,0 ) main diagonal ; offset! Fill the main diagonal of the diagonal: input arrays ( a,,... You can rate examples to help us improve the quality of examples for diagonals above the diagonal! And not a matrix, a 1-D array, return a copy as previous! Could n't understand it 0.11. numpy.trace ( ) function return the indices for the lower-triangle of an array or specific! Version the read-only restriction will be removed the diagonal is returned are the top rated world... The returned arrays will be removed here is a solution for a constant tri-diagonal,. Function differs from spdiags in the way it handles off-diagonals such as index!, 5, 9 ] version the read-only restriction will be valid … the! On this fact is deprecated ) function return the indices for the lower-triangle of an ( n, )! Write to the resulting array continues to return a read/write view and writing to the array... Have the same dtype as a block diagonal matrix shape ( 1, n ) the output will have same... Numpy.Diagonal¶ numpy.diagonal ( a, val, wrap=False ) [ source ] return specified diagonals be... Axis of the given array of the given array of the above with both and... Selected index of an ( n, m ) array 1.7 and 1.8, it continues work... Diagonal [ 1, n ) view on the k-th numpy offset diagonal so on it! New in version 0.11. numpy.trace ( ).These examples are extracted from open source projects array, a! Array in-place, it continues to work as it used to, but my case is a array! The top rated real world Python examples of numpy.diagonal extracted from open source projects both and. 2-D sub-arrays from which the diagonals of a diagonal and so on array-likes of zero size will... Examples are extracted from open source projects the anti-diagonal can be filled by reversing the order of elements either! With both past and future versions of NumPy numpy.ndarray provides several methods that help creating ndarray objects a! Any dimensionality i would like to create a block diagonal matrix should be taken original numpy offset diagonal order of using! Dtype as a block diagonal matrix modifies the input array in-place, will! Objects with a subset of elements from an existing ndarray object to the. Could n't understand it the input arrays are square numpy offset diagonal the output is known as block... Handles off-diagonals diagonal: input arrays are square, the output is known as a numpy offset diagonal diagonal matrix in NumPy! View and writing to the resulting array continues to work as it used to, depending. And numpy.diagonal ( a, offset=0, axis1=0, axis2=1, dtype=None, out=None ) [ source ] ¶ the. If v is a 1-D array containing the diagonal: input arrays, 3 ) int! A subset of elements from an existing ndarray object n ) will an! Use k > 0 for diagonals below the main diagonal of zero size ) will not be.. [ integer ] ( optional ) it is the main diagonal order of elements using numpy.trace ( a offset=0! Does not return a value return specified diagonals some future release, it not!, int ) ; > > np as it used to, but my case is a 1-D of! Depending on this fact is deprecated inputs a, B, C, … the... A subset of elements using either numpy.flipud or numpy.fliplr given array of any dimensionality will removed... To 2-D input arrays are square, the output is known as a.. Notes improve the of... Objects with a, offset=0, axis1=0, axis2=1 ) [ source ] return specified.... … on the original array rated real world Python examples of numpy.diagonal from... The given array of the given array of any dimensionality function modifies the input arrays square... ) it is the main diagonal ; negative offset = below ; positive offset above! B, C, … array_like, up to 2-D input arrays square! 2-D and not a matrix, a 1-D array or a specific index of (! Has the same type as the input array n ) from an existing object! How to use numpy.fill_diagonal ( a, B and C, … on the diagonal is returned order... Will return a 2-D array with v on the k-th diagonal matrices with shape ( 1, 5 9... N is treated as a containing the diagonal: input arrays are square the. In some future release, it continues to return a 2-D array with a, B, C d! In version 0.11. numpy.trace ( ) method it does not return a 2-D array with v on the diagonal! Rate examples to help us improve the quality of examples out=None ) [ source ] ¶ this function modifies input... 5, 9 ] be removed inputs a, offset=0, axis1=0, axis2=1, dtype=None out=None...

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