Woops, sorry about that, makes sense. Below an example (same idea as the files):

```
Python 3.6.2 (default, Sep  9 2017, 13:27:06) 
[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.38)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> src = """
... def f(x): return x
... [f(v) for v in [1,2,3]]
... """
>>> def comp():
...     exec(compile(src, filename='<str>', mode='exec'))
... 
>>> comp()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 2, in comp
  File "<str>", line 3, in <module>
  File "<str>", line 3, in <listcomp>
NameError: name 'f' is not defined
>>> exec(compile(src, filename='<str>', mode='exec'))
>>> 
```