Re: tokenize.untokenize adding line continuation characters

[sg552]

On Tuesday, January 17, 2017 at 2:47:03 AM UTC, Steven D'Aprano wrote:
> On Tuesday 17 January 2017 09:42, Rotwang wrote:
> 
> > Here's something odd I've found with the tokenize module: 
> [...]
> > Copypasted from iPython:
> 
> It's not impossible that iPython is doing something funny with the tokenize 
> module.

It happens outside iPython:

Python 3.4.3 (default, Oct 14 2015, 20:28:29) 
[GCC 4.8.4] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import io, tokenize
>>> tokenize.untokenize(tokenize.tokenize(io.BytesIO('if x:\n
>>> y'.encode()).readline)).decode()
'if x:\ny\\\n'


and also in Python 2:

Python 2.7.6 (default, Mar 22 2014, 22:59:56) 
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import io, tokenize
>>> tokenize.untokenize(tokenize.generate_tokens(io.BytesIO('if x:\n
>>> y').readline))
'if x:\ny\\\n'


> Before reporting it as a bug, I recommend that you confirm that it also 
> occurs in the standard Python interpreter and isn't iPython specific.

Is this behaviour actually a bug, as opposed to a feature I don't understand?
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Re: Getting globals of the caller, not the defining module

[sg552]

(Sorry for posting through GG, I'm at work.)

On Monday, November 11, 2013 11:25:42 AM UTC, Steven D'Aprano wrote:
 Suppose I have a function that needs access to globals:
 
 # module A.py
 def spam():
 g = globals()  # this gets globals from A
 introspect(g)
 
 As written, spam() only sees its own globals, i.e. those of the module in 
 which spam is defined. But I want spam to see the globals of the caller.
 
 # module B
 import A
 A.spam()  # I want spam to see globals from B
 
 I can have the caller explicitly pass the globals itself:
 
 def spam(globs=None):
 if globs is None:
 globs = globals()
 introspect(globs)
 
 But since spam is supposed to introspect as much information as possible, 
 I don't really want to do that. What (if anything) are my other options?

How about this?

# module A.py
import inspect
def spam():
return inspect.stack()[1][0].f_globals

# module B.py
import A
print(A.spam() is globals()) # prints True
def f():
return A.spam()

# module C.py
import B
print(B.f() is vars(B)) # prints True

I don't really know what I'm doing but I guess it won't work in alternative 
implementations of Python.
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