Hello,

I’m trying to apply a Displacement Field Transform to a point using the `Transform.TransformPoint()`

. I’ve been following the example on this webpage: 21_Transforms_and_Resampling

I currently have a M \cdot 2 numpy array of points that I would like to transform using the `TransformPoint()`

function so I pass in one point at a time. However, I receive the following error when attempting to do so:

```
TypeError: in method 'Transform_TransformPoint', argument 2 of type 'std::vector< double,std::allocator< double > > const &'
```

I’ve run the following tests:

T is of type `SimpleITK.DisplacementFieldTransform()`

. It has a dimension of 2.

## Works

```
p1 = (100,100)
p2 = [100,100]
T.TransformPoint((100,100)) = (121.52352626788556, 121.38996079802627)
T.TransformPoint([100,100]) = ...
T.TransformPoint([100.0,100.0]) = ...
```

## Does Not Work

```
x = 100
y = 100
p1 = (100,100) # Type tuple
p2 = [100,100] # Type list
T.TransformPoint((x, y)) = TypeError
T.TransformPoint([x,y]) = TypeError
T.TransformPoint(p1) = TypeError
T.TransformPoint(p2) = TypeError
```

I’m not really sure how I can fix this from the Python end but I am open to suggestions.

I’m currently running this on Windows 10 in an Anaconda environment with SimpleITK installed.