# python question

**URL:** <https://discourse.itk.org/t/python-question/1411>\
**Category:** Beginner Questions\
**Created:** [November 12, 2018, 11:52am UTC](https://discourse.itk.org/t/python-question/1411 "2018-11-12T11:52:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![wangfeng](https://discourse.itk.org/letter_avatar_proxy/v4/letter/w/f1d935/32.png) [@wangfeng](https://discourse.itk.org/u/wangfeng)\
**Post date:** [November 12, 2018, 11:52am UTC](https://discourse.itk.org/t/python-question/1411/1 "2018-11-12T11:52:37Z")

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I have a C++ example,but I can not run this in Python. Help me ,please !  
[C++]  
…  
…  
typedef RegistrationType::ParametersType ParametersType;  
ParametersType initialParameters( transform-\>GetNumberOfParameters() );

initialParameters[0] = 0.0; // Initial offset in mm along X  
initialParameters[1] = 0.0; // Initial offset in mm along Y

registration-\>SetInitialTransformParameters( initialParameters );

[Python-codes:]  
initialParameters = [0.0 for i in range(transform.GetNumberOfParameters())]  
registration.SetInitialTransformParameters(initialParameters)

[Error-informations:]  
—\> registration.SetInitialTransformParameters(initialParameters)  
TypeError: in method ‘itkImageRegistrationMethodIF2IF2\_SetInitialTransformParameters’, argument 2 of type ‘itkOptimizerParametersD const &’

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**Author:** ![matt.mccormick](https://discourse.itk.org/user_avatar/discourse.itk.org/matt.mccormick/32/7_2.png) [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Post date:** [November 12, 2018, 5:26pm UTC](https://discourse.itk.org/t/python-question/1411/2 "2018-11-12T17:26:24Z")

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Hi @wangfeng,

Try,

```auto
initialParameters = itk.OptimizerParameters[itk.D](transform.GetNumberOfParameters())
initialParameters[0] = 0.0
initialParameters[1] = 0.0
# or
initialParameters.Fill(0.0)

```

HTH,  
Matt

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<div class="post-metadata">

**Author:** ![wangfeng](https://discourse.itk.org/letter_avatar_proxy/v4/letter/w/f1d935/32.png) [@wangfeng](https://discourse.itk.org/u/wangfeng)\
**Post date:** [November 13, 2018, 1:57am UTC](https://discourse.itk.org/t/python-question/1411/3 "2018-11-13T01:57:16Z")

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Hi,@Matt  
Thank you very much.Thank you for your help.😀