Cannot run scikit-image in Python 3.6

[newmanf]

I am trying to run a small piece of code in Python 3.6 from scikit-image. I've loaded scikit-image and the pieces seem to be there. Here is the code:

import numpy as np
from skimage import data
coins = data.coins()
histo = np.histogram(coins, bins=np.arange(0, 256))

Here is the error:

Error:
runfile('C:/Users/franc/Anaconda3/Lib/site-packages/numpy/core/coin_histogram.py', wdir='C:/Users/franc/Anaconda3/Lib/site-packages/numpy/core')
Traceback (most recent call last):

  File "<ipython-input-25-e62c5588c948>", line 1, in <module>
    runfile('C:/Users/franc/Anaconda3/Lib/site-packages/numpy/core/coin_histogram.py', wdir='C:/Users/franc/Anaconda3/Lib/site-packages/numpy/core')

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\spyder\utils\site\sitecustomize.py", line 705, in runfile
    execfile(filename, namespace)

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\spyder\utils\site\sitecustomize.py", line 102, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "C:/Users/franc/Anaconda3/Lib/site-packages/numpy/core/coin_histogram.py", line 4, in <module>
    from skimage import data

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\skimage\data\__init__.py", line 16, in <module>
    from ..io import imread, use_plugin

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\skimage\io\__init__.py", line 7, in <module>
    from .manage_plugins import *

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\skimage\io\manage_plugins.py", line 28, in <module>
    from .collection import imread_collection_wrapper

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\skimage\io\collection.py", line 12, in <module>
    from PIL import Image

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\PIL\Image.py", line 56, in <module>
    from . import _imaging as core

ImportError: DLL load failed: The specified module could not be found.

No matter what I run from scikit-image I get a similar error.

I am able to run scikit-learn, tensorflow, pretty much everything but cannot run scikit-image.

Tearing my hair out.

[snippsat]

In same error message it jumps franc/Anaconda3/ franc\Anaconda3_new

[newmanf]

Yes good observation. But I discovered I could run other more complex code. I believe the problem lies in other pieces of code that it calls, particularly

from . import _imaging as core

I don't think that the jumping from Anaconda3 to Anaconda3_new makes a difference. For example I can run

import numpy as np
import matplotlib.pyplot as plt

from skimage import measure


# Construct some test data
x, y = np.ogrid[-np.pi:np.pi:100j, -np.pi:np.pi:100j]
r = np.sin(np.exp((np.sin(x)**3 + np.cos(y)**2)))

# Find contours at a constant value of 0.8
contours = measure.find_contours(r, 0.8)

# Display the image and plot all contours found
fig, ax = plt.subplots()
ax.imshow(r, interpolation='nearest', cmap=plt.cm.gray)

for n, contour in enumerate(contours):
    ax.plot(contour[:, 1], contour[:, 0], linewidth=2)

ax.axis('image')
ax.set_xticks([])
ax.set_yticks([])
plt.show()

with no problem. Thank youi

[snippsat]

You should only have one Anaconda instantiation.
If it work in some scenarios dos not mean that it work in all(should not jump at all).
It easy to create isolated virtual environment,so no need for two main installation.
Example:

# Make enviroment
G:\Anaconda3\Scripts
λ conda create -n sci_env scikit-image numpy    

# Activate
G:\Anaconda3\Scripts
λ activate sci_env

(sci_env) G:\Anaconda3\Scripts
λ which python
/g/Anaconda3/envs/sci_env/python

# Run your first code added print(histo)
(sci_env) G:\Anaconda3\envs\sci_env
λ python sci_test.py

Output:
(array([   0,    1,    2,    7,   10,    7,   10,   27,   16,   14,   17,
         .......................................
       247, 248, 249, 250, 251, 252, 253, 254, 255]))

So working and totally isolated from main version.
You can look at my tutorial about Anaconda

[newmanf]

Yes I agree it would be cleaner to have one Anaconda instantiation. However here is an example where only one Anaconda instantiation is invoked and the same errors occur

Error:
runfile('C:/Users/franc/Anaconda3_new/Lib/site-packages/PIL/hough_transform.py', wdir='C:/Users/franc/Anaconda3_new/Lib/site-packages/PIL')
Traceback (most recent call last):

  File "<ipython-input-61-268539df075b>", line 1, in <module>
    runfile('C:/Users/franc/Anaconda3_new/Lib/site-packages/PIL/hough_transform.py', wdir='C:/Users/franc/Anaconda3_new/Lib/site-packages/PIL')

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\spyder\utils\site\sitecustomize.py", line 705, in runfile
    execfile(filename, namespace)

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\spyder\utils\site\sitecustomize.py", line 102, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "C:/Users/franc/Anaconda3_new/Lib/site-packages/PIL/hough_transform.py", line 6, in <module>
    from skimage import data

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\skimage\data\__init__.py", line 16, in <module>
    from ..io import imread, use_plugin

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\skimage\io\__init__.py", line 7, in <module>
    from .manage_plugins import *

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\skimage\io\manage_plugins.py", line 28, in <module>
    from .collection import imread_collection_wrapper

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\skimage\io\collection.py", line 12, in <module>
    from PIL import Image

  File "C:\Users\franc\Anaconda3_new\lib\site-packages\PIL\Image.py", line 56, in <module>
    from . import _imaging as core

ImportError: DLL load failed: The specified module could not be found.

I believe it is in the module

from . import _imaging as core 

[snippsat]

Try update pillow.
conda update pillow
Error is reported here
See that downgrade work for some.

conda uninstall pillow
conda install pillow=4.0.0

The problem should be fixed in Python 3.6.1 -->

[AjManoj]

try conda install -c conda-forge pillow=4.3.0