[BUGFIX] Fix ConvTranspose __repr__ (#19338)

[gilbertfrancois]

Fix the direction of in_channels -> out_channels in the repr function for ConvTranspose classes.

Co-authored-by: g4b1nagy gabrian.nagy@gmail.com

fixes #19338

[mxnet-bot]

Hey @gilbertfrancois , Thanks for submitting the PR
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[gilbertfrancois]

I made a small test to show its new behaviour. Note that the test is done on gpu, because on cpu, only 1D or 2D Deconvolution is supported.

import mxnet as mx


ctx = mx.gpu(0)

x_1d = mx.nd.random.randn(1, 1, 8, ctx=ctx)
x_2d = mx.nd.random.randn(1, 1, 8, 8, ctx=ctx)
x_3d = mx.nd.random.randn(1, 1, 8, 8, 8, ctx=ctx)

conv = mx.gluon.nn.Conv1D(in_channels=1, channels=2, kernel_size=3, strides=1)
conv.initialize(ctx=ctx)
y_1d = conv(x_1d)
mx.nd.waitall()
print(conv)
assert x_1d.shape[1] == 1
assert y_1d.shape[1] == 2
conv_t = mx.gluon.nn.Conv1DTranspose(in_channels=1, channels=2, kernel_size=3, strides=1)
conv_t.initialize(ctx=ctx)
y_1d = conv_t(x_1d)
mx.nd.waitall()
print(conv_t)
assert x_1d.shape[1] == 1
assert y_1d.shape[1] == 2

conv = mx.gluon.nn.Conv2D(in_channels=1, channels=2, kernel_size=3, strides=1)
conv.initialize(ctx=ctx)
y_2d = conv(x_2d)
mx.nd.waitall()
print(conv)
assert x_2d.shape[1] == 1
assert y_2d.shape[1] == 2
assert "1 -> 2" in conv.__repr__()
conv_t = mx.gluon.nn.Conv2DTranspose(in_channels=1, channels=2, kernel_size=3, strides=1)
conv_t.initialize(ctx=ctx)
y_2d = conv_t(x_2d)
mx.nd.waitall()
print(conv_t)
assert x_2d.shape[1] == 1
assert y_2d.shape[1] == 2
assert "1 -> 2" in conv_t.__repr__()

conv = mx.gluon.nn.Conv3D(in_channels=1, channels=2, kernel_size=3, strides=1)
conv.initialize(ctx=ctx)
y_3d = conv(x_3d)
mx.nd.waitall()
assert x_3d.shape[1] == 1
assert y_3d.shape[1] == 2
print(conv)
conv_t = mx.gluon.nn.Conv3DTranspose(in_channels=1, channels=2, kernel_size=3, strides=1)
conv_t.initialize(ctx=ctx)
y_3d = conv_t(x_3d)
mx.nd.waitall()
assert x_3d.shape[1] == 1
assert y_3d.shape[1] == 2
print(conv_t)

[leezu]

@mxnet-bot run ci [centos-cpu]

[mxnet-bot]

Jenkins CI successfully triggered : [centos-cpu]

[szha]

thanks for the fix @gilbertfrancois @g4b1nagy