No module named 'rpytools'?

Question

I'm trying to work with the reticulate library in R. I used the "functions.py" example to test it out:

# functions.py file
def add(x, y): 
    return x + y

In R studio (Version 3.5.2), this is what I have:

library(reticulate)  
source_python('functions.py')

However, this returns an error:

Error in py_set_attr_impl(x, name, value) : 
  Evaluation error: ModuleNotFoundError: No module named 'rpytools'.

So I'm stuck here. If it helps, I'll also share that my Python is 64-bit and version 3.6.5. Anyone know how to go about this?

Thanks

score 2 · Accepted Answer · answered Feb 22 '19 at 00:30

rpytools is a module provided by reticulate and should be placed on the module path for you. For example, I see:

> library(reticulate)
> sys <- import("sys", convert = TRUE)
> sys$path
 [1] ""                                                                                                          
 [2] "/usr/local/Cellar/python@2/2.7.15_3/Frameworks/Python.framework/Versions/2.7/bin"                          
 [3] "/Users/kevin/Library/Python/2.7/lib/python/site-packages/pip-18.1-py2.7.egg"                               
 [4] "/Users/kevin/Library/Python/2.7/lib/python/site-packages/virtualenv-16.0.0-py2.7.egg"                      
 [5] "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python27.zip"                         
 [6] "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7"                            
 [7] "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin"                
 [8] "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac"                   
 [9] "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages"
[10] "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk"                     
[11] "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old"                    
[12] "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload"                
[13] "/Users/kevin/Library/Python/2.7/lib/python/site-packages"                                                  
[14] "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages"              
[15] "/Users/kevin/Library/R/3.5/library/reticulate/python"

Note the last entry, which provides the path where rpytools would be found on import. Do you see something similar?

score 0 · Answer 2 · edited Jun 07 '21 at 16:15

Install reticulate package, create conda env and install keras, tf and anything else you need.

Find where the packages for your current R version get stored, and locate reticulate folder, inside there should be a python/rpytools directory. (in my case R packages were installed in 'C:\Users\abc\Documents\R\win-library\4.1\reticulate\python')

Use this code:

    library(reticulate)
    sys <- import("sys", convert = TRUE)
    sys$path

Last entry shows directory where you should copy the rpytools folder. After this, things started working for me.

No module named 'rpytools'?

2 Answers2