How to pass org-babel code block as variable to another code block?

Question

I would like to pass the code from code block test_python to script. I do not want test_python to be evaluated, but simply to have the source code inserted into script when I evaluate script. The goal is to have a more generic extended version of script that will do some useful stuff to setup the environment and run the contents of test_python such that it can be run on different machines. I'd like to eventually hide the script block in a #+INCLUDEed org mode file, then just be able to have the test_python block and a #+CALL to script in the primary org mode.

A minimal example where I am trying to do this is:

#+NAME: test_python
#+BEGIN_SRC ipython :results none :exports none
  import numpy as np

  x0 = np.arange(-1, 1, 1/10.)
  x1 = np.arange(-1, 1, 1/10.)
  x0, x1 = np.meshgrid(x0, x1)
  y_truth = x0**2 - x1**2 + x1 - 1

  print('inside python')
#+END_SRC

#+NAME: script
#+HEADER: :var python_code=""
#+BEGIN_SRC bash :results output
  #!/bin/bash

  result=$(python <<EOF
  $python_code
  EOF
  )
  echo $python_code
  echo $result
  echo "done test"
#+END_SRC

#+NAME: script_generator
#+CALL: script[:var python_code=test_python]

Adding one more thing: I am actually tangling script to write to file. I just removed that for the sake of the example.

--- Edit

I had left out some of this to try to get to a minimal example, but it seems that will make the question more clear. Ultimately I want this to look like the following.

any org file I'm currently working in:

* Some cool org stuff
:PROPERTIES:
:OUT_SCRIPT: /ssh:otherMachine:~/scripts/test_python.sh
:END:

#+INCLUDE: ~/org/script_utils.org

#+NAME: test_python
#+BEGIN_SRC ipython :results none :exports none
  import numpy as np

  x0 = np.arange(-1, 1, 1/10.)
  x1 = np.arange(-1, 1, 1/10.)
  x0, x1 = np.meshgrid(x0, x1)
  y_truth = x0**2 - x1**2 + x1 - 1

  print('inside python')
#+END_SRC

#+NAME: script_generator
#+CALL: script[:var python_code=test_python,script_path=OUT_SCRIPT]

and

script_utils.org:

#+NAME: script
#+HEADER: :var python_code="", script_path=""
#+BEGIN_SRC bash :results output :tangle script_path
  #!/bin/bash

  result=$(python <<EOF
  $python_code
  EOF
  )
  echo $python_code
  echo $result
  echo "done test"
#+END_SRC

Answer 1

The Noweb reference syntax may help in such cases. Using this syntax, the body of a given code block can be executed inside the body of another code block. As a summary of the Org manual page:

1. You have to NAME the first code block
2. Add its <<NAME>> in a second code block, which will have :noweb yes as a header argument. Then, <<NAME>> will be expanded/interpreted as the contents of the first code block.

I give an example below, adapted from your own example:

#+NAME: test_python
#+BEGIN_SRC python :results none :exports none
import numpy as np

x0 = np.arange(-1, 1, 1/10.)
x1 = np.arange(-1, 1, 1/10.)
x0, x1 = np.meshgrid(x0, x1)
y_truth = x0**2 - x1**2 + x1 - 1

print('inside python')
#+END_SRC

#+NAME: script
#+BEGIN_SRC bash :results output :noweb yes
#!/bin/bash
result=$(python <<EOF
<<test_python>>
EOF
)
echo $result
echo "done test"
#+END_SRC

#+RESULTS: script
: inside python
: done test