Thanks to PythonCall.jl, Python functions can be defined in Julia files like so:

```
julia> using PythonCall
julia> @pyexec """
def fib(n):
a, b = 0, 1
for i in range(n):
a, b = b, a+b
return a
""" => fib
Python: <function fib at 0x7fc57dbf9940>
julia> fib(10)
Python: 55
```

But for some reason it fails with package imports. Note that `numpy`

is indeed present in the environment, as evidenced by the `print`

statement:

```
julia> @pyexec """
import numpy as np
print(np)
def mysum(x):
return np.sum(x)
""" => mysum
<module 'numpy' from '[...]/.CondaPkg/env/lib/python3.11/site-packages/numpy/__init__.py'>
Python: <function mysum at 0x7fc57dbf96c0>
julia> mysum([1, 2])
ERROR: Python: NameError: name 'np' is not defined
Python stacktrace:
[1] mysum
@ /home/guillaume/Work/GitHub/Julia/Sandbox/pythoncall_jax.jl:38:4
Stacktrace:
[1] pythrow()
@ PythonCall ~/.julia/packages/PythonCall/wXfah/src/err.jl:94
[2] errcheck
@ ~/.julia/packages/PythonCall/wXfah/src/err.jl:10 [inlined]
[3] pycallargs
@ ~/.julia/packages/PythonCall/wXfah/src/abstract/object.jl:210 [inlined]
[4] pycall(f::Py, args::Vector{Int64}; kwargs::@Kwargs{})
@ PythonCall ~/.julia/packages/PythonCall/wXfah/src/abstract/object.jl:228
[5] pycall
@ PythonCall ~/.julia/packages/PythonCall/wXfah/src/abstract/object.jl:218 [inlined]
[6] (::Py)(args::Vector{Int64})
@ PythonCall ~/.julia/packages/PythonCall/wXfah/src/Py.jl:341
[7] top-level scope
@ ~/Work/GitHub/Julia/Sandbox/pythoncall_jax.jl:45
```

@cjdoris any clue about this one?

See earlier post where @hubert had asked the same question at the end: