# ChangeInformationImageFilter missing from Pip-installed ITK 5.3rc4post3

**URL:** https://discourse.itk.org/t/changeinformationimagefilter-missing-from-pip-installed-itk-5-3rc4post3/5375
**Category:** Uncategorized
**Tags:** python
**Created:** [September 29, 2022, 4:30pm UTC](https://discourse.itk.org/t/changeinformationimagefilter-missing-from-pip-installed-itk-5-3rc4post3/5375 "2022-09-29T16:30:16Z")
**Posts on this page:** 3
**Page:** 1

<div class="post-metadata">

### Author: ![mchinand](https://discourse.itk.org/user_avatar/discourse.itk.org/mchinand/32/244_2.png) [@mchinand](https://discourse.itk.org/u/mchinand)
#### Post date: [September 29, 2022, 4:30pm UTC](https://discourse.itk.org/t/changeinformationimagefilter-missing-from-pip-installed-itk-5-3rc4post3/5375/1 "2022-09-29T16:30:16Z")

</div>

When I try to use ChangeInformationImageFilter I get `attributeError: module 'itk' has no attribute 'ChangeInformationImageFilter'` after upgrading to ITK5.3rc4. I’m trying to use it with code that worked with 5.2.1.

I ran ` pip install --upgrade --pre itk`  
and the Python code is basically:

```auto
import itk
import numpy as np
.
.
.
// create 3d numpy array named image3d
itkimage = itk.GetImageFromArray(image3d)
change_filter = itk.ChangeInformationImageFilter.New(itkimage)

```

Full error:

```auto
Traceback (most recent call last):
  File "C:\Users\mchinander\Documents\Python\venv\lib\site-packages\IPython\core\interactiveshell.py", line 3457, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-6-1f555431e995>", line 1, in <module>
    change_filter = itk.ChangeInformationImageFilter(itkimage)
  File "C:\Users\mchinander\Documents\Python\venv\lib\site-packages\itk\support\lazy.py", line 131, in __getattribute__
    value = types.ModuleType. __getattribute__ (self, attr)
AttributeError: module 'itk' has no attribute 'ChangeInformationImageFilter'

```

Was it intentionally removed? According to the [C++ documentation](https://itk.org/Doxygen/html/classitk_1_1ChangeInformationImageFilter.html), the filter still exists in 5.3. Is there a workaround available or should I just downgrade to 5.2.1?

---

<div class="post-metadata">

### Author: ![dzenanz](https://discourse.itk.org/user_avatar/discourse.itk.org/dzenanz/32/1093_2.png) [@dzenanz](https://discourse.itk.org/u/dzenanz)
#### Post date: [September 29, 2022, 7:05pm UTC](https://discourse.itk.org/t/changeinformationimagefilter-missing-from-pip-installed-itk-5-3rc4post3/5375/2 "2022-09-29T19:05:13Z")

</div>

The usual problem here is some leftover of earlier versions. Purging all traces of ITK from Lib/site-packages (including manual browsing and deletions, just `pip uninstall itk` is usually not enough), and then `pip install --upgrade --pre itk` should fix that.

---

<div class="post-metadata">

### Author: ![mchinand](https://discourse.itk.org/user_avatar/discourse.itk.org/mchinand/32/244_2.png) [@mchinand](https://discourse.itk.org/u/mchinand)
#### Post date: [September 29, 2022, 7:21pm UTC](https://discourse.itk.org/t/changeinformationimagefilter-missing-from-pip-installed-itk-5-3rc4post3/5375/3 "2022-09-29T19:21:44Z")

</div>

Thanks, that (deleting the itk directory in Lib/site-packages after pip uninstalling the previous itk version) seems to have worked.