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add np.load. · MSavameri/TensorFlow.NET@7f0b9b6 · GitHub

  1. MSavameri
  2. TensorFlow.NET

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Commit 7f0b9b6

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Oceania2018
committed
add np.load.
1 parent 254ba33 commit 7f0b9b6

5 files changed

Lines changed: 175 additions & 3 deletions

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‎src/TensorFlowNET.Core/NumPy/Implementation/NumPyImpl.Creation.cs‎

Lines changed: 16 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,9 @@
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using Tensorflow.Util;
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using static Tensorflow.Binding;
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namespace Tensorflow.NumPy
@@ -67,6 +70,19 @@ public NDArray linspace<T>(T start, T stop, int num = 50, bool endpoint = true,
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return new NDArray(result);
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}
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Array ReadValueMatrix(BinaryReader reader, Array matrix, int bytes, Type type, int[] shape)
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{
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int total = 1;
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for (int i = 0; i < shape.Length; i++)
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total *= shape[i];
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var buffer = new byte[bytes * total];
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reader.Read(buffer, 0, buffer.Length);
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System.Buffer.BlockCopy(buffer, 0, matrix, 0, buffer.Length);
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return matrix;
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}
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public (NDArray, NDArray) meshgrid<T>(T[] array, bool copy = true, bool sparse = false)
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{
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var tensors = array_ops.meshgrid(array, copy: copy, sparse: sparse);

‎src/TensorFlowNET.Core/NumPy/Implementation/NumPyImpl.load.cs‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,145 @@
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using Tensorflow.Util;
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namespace Tensorflow.NumPy
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{
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public partial class NumPyImpl
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{
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public NDArray load(string file)
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{
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using var stream = new FileStream(file, FileMode.Open);
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using var reader = new BinaryReader(stream, Encoding.ASCII, leaveOpen: true);
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int bytes;
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Type type;
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int[] shape;
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if (!ParseReader(reader, out bytes, out type, out shape))
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throw new FormatException();
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Array array = Create(type, shape.Aggregate((dims, dim) => dims * dim));
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var result = new NDArray(ReadValueMatrix(reader, array, bytes, type, shape));
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return result.reshape(shape);
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}
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bool ParseReader(BinaryReader reader, out int bytes, out Type t, out int[] shape)
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{
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bytes = 0;
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t = null;
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shape = null;
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// The first 6 bytes are a magic string: exactly "x93NUMPY"
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if (reader.ReadChar() != 63) return false;
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if (reader.ReadChar() != 'N') return false;
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if (reader.ReadChar() != 'U') return false;
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if (reader.ReadChar() != 'M') return false;
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if (reader.ReadChar() != 'P') return false;
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if (reader.ReadChar() != 'Y') return false;
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byte major = reader.ReadByte(); // 1
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byte minor = reader.ReadByte(); // 0
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if (major != 1 || minor != 0)
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throw new NotSupportedException();
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ushort len = reader.ReadUInt16();
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string header = new String(reader.ReadChars(len));
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string mark = "'descr': '";
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int s = header.IndexOf(mark) + mark.Length;
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int e = header.IndexOf("'", s + 1);
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string type = header.Substring(s, e - s);
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bool? isLittleEndian;
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t = GetType(type, out bytes, out isLittleEndian);
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if (isLittleEndian.HasValue && isLittleEndian.Value == false)
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throw new Exception();
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mark = "'fortran_order': ";
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s = header.IndexOf(mark) + mark.Length;
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e = header.IndexOf(",", s + 1);
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bool fortran = bool.Parse(header.Substring(s, e - s));
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if (fortran)
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throw new Exception();
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mark = "'shape': (";
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s = header.IndexOf(mark) + mark.Length;
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e = header.IndexOf(")", s + 1);
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shape = header.Substring(s, e - s).Split(',').Where(v => !String.IsNullOrEmpty(v)).Select(Int32.Parse).ToArray();
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return true;
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}
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Type GetType(string dtype, out int bytes, out bool? isLittleEndian)
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{
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isLittleEndian = IsLittleEndian(dtype);
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bytes = Int32.Parse(dtype.Substring(2));
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string typeCode = dtype.Substring(1);
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if (typeCode == "b1")
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return typeof(bool);
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if (typeCode == "i1")
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return typeof(Byte);
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if (typeCode == "i2")
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return typeof(Int16);
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if (typeCode == "i4")
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return typeof(Int32);
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if (typeCode == "i8")
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return typeof(Int64);
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if (typeCode == "u1")
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return typeof(Byte);
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if (typeCode == "u2")
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return typeof(UInt16);
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if (typeCode == "u4")
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return typeof(UInt32);
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if (typeCode == "u8")
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return typeof(UInt64);
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if (typeCode == "f4")
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return typeof(Single);
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if (typeCode == "f8")
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return typeof(Double);
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if (typeCode.StartsWith("S"))
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return typeof(String);
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throw new NotSupportedException();
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}
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bool? IsLittleEndian(string type)
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{
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bool? littleEndian = null;
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switch (type[0])
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{
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case '<':
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littleEndian = true;
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break;
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case '>':
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littleEndian = false;
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break;
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case '|':
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littleEndian = null;
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break;
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default:
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throw new Exception();
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}
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return littleEndian;
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}
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Array Create(Type type, int length)
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{
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// ReSharper disable once PossibleNullReferenceException
139+
while (type.IsArray)
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type = type.GetElementType();
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return Array.CreateInstance(type, length);
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}
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}
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}

‎src/TensorFlowNET.Core/NumPy/NDArray.Implicit.cs‎

Lines changed: 4 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -8,9 +8,10 @@ public partial class NDArray
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{
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public void Deconstruct(out byte blue, out byte green, out byte red)
1010
{
11-
blue = (byte)dims[0];
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green = (byte)dims[1];
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red = (byte)dims[2];
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var data = Data<byte>();
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blue = data[0];
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green = data[1];
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red = data[2];
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}
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public static implicit operator NDArray(Array array)

‎src/TensorFlowNET.Core/Numpy/NDArray.Creation.cs‎

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Original file line numberDiff line numberDiff line change
@@ -19,6 +19,7 @@ public partial class NDArray
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public NDArray(Shape shape, TF_DataType dtype = TF_DataType.TF_DOUBLE) => Init(shape, dtype: dtype);
2020
public NDArray(Tensor value, Shape? shape = null) => Init(value, shape);
2121
public NDArray(byte[] bytes, Shape shape, TF_DataType dtype) => Init(bytes, shape, dtype);
22+
public NDArray(IntPtr address, Shape shape, TF_DataType dtype) => Init(address, shape, dtype);
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2324
public static NDArray Scalar<T>(T value) where T : unmanaged
2425
=> value switch
@@ -75,5 +76,11 @@ void Init(byte[] bytes, Shape shape, TF_DataType dtype)
7576
_tensor = new Tensor(bytes, shape, dtype);
7677
_tensor.SetReferencedByNDArray();
7778
}
79+
80+
void Init(IntPtr address, Shape shape, TF_DataType dtype)
81+
{
82+
_tensor = new Tensor(address, shape, dtype);
83+
_tensor.SetReferencedByNDArray();
84+
}
7885
}
7986
}

‎src/TensorFlowNET.Core/Numpy/Numpy.Creation.cs‎

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -40,6 +40,9 @@ public static NDArray linspace<T>(T start, T stop, int num = 50, bool endpoint =
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TF_DataType dtype = TF_DataType.TF_DOUBLE, int axis = 0) where T : unmanaged
4141
=> tf.numpy.linspace(start, stop, num: num, endpoint: endpoint, retstep: retstep, dtype: dtype, axis: axis);
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43+
public static NDArray load(string file)
44+
=> tf.numpy.load(file);
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public static (NDArray, NDArray) meshgrid<T>(T x, T y, bool copy = true, bool sparse = false)
4447
=> tf.numpy.meshgrid(new[] { x, y }, copy: copy, sparse: sparse);
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