[O] noweb and :var statements

[Ken Mankoff]

Hi Org list,

I'm having with noweb and variables. Can someone explain what I'm doing wrong? 
For example, if I have this table:

#+NAME: table_foo
| foo |
|-----|
|  42 |
| 100 |

And I want to import it into Python and use it, I can do that like this:

#+NAME: import
#+BEGIN_SRC python :var table=table_foo :session foo
import numpy as np
table = np.array(table).astype(np.float).flatten()
#+END_SRC

Eval of this block works, and if I tangle it, I see:

> table=[[42], [100]]
> import numpy as np
> table = np.array(table).astype(np.float).flatten()

But if I want to use that block elsewhere via noweb, it doesn't seem to work:

#+BEGIN_SRC python :results output drawer :noweb yes :session foo :tangle 
import_noweb.py
<<import()>>
#+END_SRC

The code runs and in a clean *foo* session I do have my table variable, but I 
*also* get an error. The buffer contains the text at the bottom of this 
message, and the tangled code in import_noweb.py is only "nil".

How can I 1) run noweb blocks with variables and 2) tangle noweb blocks with 
variables (i.e. tangle tables into source files).

Thanks,

  -k.


table=[[42], [100]]
Python 2.7.15+ (default, Jul  9 2019, 16:51:35) 
[GCC 7.4.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> >>> python.el: native completion setup loaded
>>> 
>>> import numpy as np
table = np.array(table).astype(np.float).flatten()

open('/tmp/babel-Mb4ojd/python-GEnZeZ', 'w').write(str(_))


'org_babel_python_eoe'
>>> Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name '_' is not defined
>>> >>> >>> 'org_babel_python_eoe'
>>> 
>>> 
>>> 
>>> 
>>> 'org_babel_python_eoe'
'org_babel_python_eoe'
>>>