can a method access/set another's variables?

[asdf1234234]

My code is:
-a.py-
import b

class A:
def __init__(self):
pass
def my_method(self) :
var = 1
self.var = 2
b.set_var(self)
print var
print self.var

my_a = A()
my_a.my_method( )

-b.py-
def set_var(self):
var = 2
self.var = 2

I want both var and self.var to be 2 at the end. Is there anything I
can pass to set_var() that will give it access to the variables in
my_method() like I can use self for the variables in the class A?
Thanks!

[Michael Hoffman]

Re: can a method access/set another's variables?

asdf1234234 wrote:

-a.py-
import b
>
class A:
def __init__(self):
pass
def my_method(self) :
var = 1
self.var = 2
b.set_var(self)
print var
print self.var
>
my_a = A()
my_a.my_method( )
>
-b.py-
def set_var(self):
var = 2
self.var = 2
>
I want both var and self.var to be 2 at the end. Is there anything I
can pass to set_var() that will give it access to the variables in
my_method() like I can use self for the variables in the class A?

I hope there isn't a way to do this that simply. :) Why do you want to
do this, or is it idle curiosity? There is almost surely a better way to
solve your underlying problem.

You can *read* your caller's local variables (either pass locals() as an
argument or use inspect to get the frame locals), but writing to this
dictionary has undefined behavior.
--
Michael Hoffman

[wswilson]

Re: can a method access/set another's variables?

On Apr 1, 9:43 pm, Michael Hoffman <cam.ac...@mh39 1.invalidwrote:

asdf1234234 wrote:

-a.py-
import b

>

class A:
def __init__(self):
pass
def my_method(self) :
var = 1
self.var = 2
b.set_var(self)
print var
print self.var

>

my_a = A()
my_a.my_method( )

>

-b.py-
def set_var(self):
var = 2
self.var = 2

>

I want both var and self.var to be 2 at the end. Is there anything I
can pass to set_var() that will give it access to the variables in
my_method() like I can use self for the variables in the class A?

>
I hope there isn't a way to do this that simply. :) Why do you want to
do this, or is it idle curiosity? There is almost surely a better way to
solve your underlying problem.
>
You can *read* your caller's local variables (either pass locals() as an
argument or use inspect to get the frame locals), but writing to this
dictionary has undefined behavior.
--
Michael Hoffman

I am parsing a document which contains some lines with code I want to
eval or exec. However, due to the complexity of the parsing, I am
splitting it among different methods. So, if I eval something in one
method, it won't be there if I try to access its value a few lines
later since I happen to be in a different method in the parser. Thanks
for the help!

[7stud]

Re: can a method access/set another's variables?

On Apr 1, 7:56 pm, "wswilson" <wswil...@gmail .comwrote:

On Apr 1, 9:43 pm, Michael Hoffman <cam.ac...@mh39 1.invalidwrote:
>
>
>

asdf1234234 wrote:

-a.py-
import b

>

class A:
def __init__(self):
pass
def my_method(self) :
var = 1
self.var = 2
b.set_var(self)
print var
print self.var

>

my_a = A()
my_a.my_method( )

>

-b.py-
def set_var(self):
var = 2
self.var = 2

>

I want both var and self.var to be 2 at the end. Is there anything I
can pass to set_var() that will give it access to the variables in
my_method() like I can use self for the variables in the class A?

>

I hope there isn't a way to do this that simply. :) Why do you want to
do this, or is it idle curiosity? There is almost surely a better way to
solve your underlying problem.

>

You can *read* your caller's local variables (either pass locals() as an
argument or use inspect to get the frame locals), but writing to this
dictionary has undefined behavior.
--
Michael Hoffman

>
I am parsing a document which contains some lines with code I want to
eval or exec. However, due to the complexity of the parsing, I am
splitting it among different methods. So, if I eval something in one
method, it won't be there if I try to access its value a few lines
later since I happen to be in a different method in the parser. Thanks
for the help!

class Parser(object):
def early_parse(sel f):
self.result1 = eval("10 + 5")

def later_parse(sel f):
self.result2 = self.result1 + eval("20 * 2")

p = Parser()
p.early_parse()
p.later_parse()
print p.result1
print p.result2

[7stud]

Re: can a method access/set another's variables?

On Apr 1, 7:56 pm, "wswilson" <wswil...@gmail .comwrote:

On Apr 1, 9:43 pm, Michael Hoffman <cam.ac...@mh39 1.invalidwrote:
>
>
>

asdf1234234 wrote:

-a.py-
import b

>

class A:
def __init__(self):
pass
def my_method(self) :
var = 1
self.var = 2
b.set_var(self)
print var
print self.var

>

my_a = A()
my_a.my_method( )

>

-b.py-
def set_var(self):
var = 2
self.var = 2

>

I want both var and self.var to be 2 at the end. Is there anything I
can pass to set_var() that will give it access to the variables in
my_method() like I can use self for the variables in the class A?

>

I hope there isn't a way to do this that simply. :) Why do you want to
do this, or is it idle curiosity? There is almost surely a better way to
solve your underlying problem.

>

You can *read* your caller's local variables (either pass locals() as an
argument or use inspect to get the frame locals), but writing to this
dictionary has undefined behavior.
--
Michael Hoffman

>
I am parsing a document which contains some lines with code I want to
eval or exec. However, due to the complexity of the parsing, I am
splitting it among different methods. So, if I eval something in one
method, it won't be there if I try to access its value a few lines
later since I happen to be in a different method in the parser. Thanks
for the help!

class A(object):
def early_parse(sel f):
self.result1 = eval("10 + 5")

class MyParser(object ):
def later_parse(sel f):
MyParser.a.resu lt2 = MyParser.a.resu lt1 + eval("20 *
2")

a = A()

p = MyParser()
p.a.early_parse ()
p.later_parse()
print p.a.result1
print p.a.result2

[7stud]

Re: can a method access/set another's variables?

On Apr 1, 7:43 pm, Michael Hoffman <cam.ac...@mh39 1.invalidwrote:

asdf1234234 wrote:

-a.py-
import b

>

class A:
def __init__(self):
pass
def my_method(self) :
var = 1
self.var = 2
b.set_var(self)
print var
print self.var

>

my_a = A()
my_a.my_method( )

>

-b.py-
def set_var(self):
var = 2
self.var = 2

>

I want both var and self.var to be 2 at the end. Is there anything I
can pass to set_var() that will give it access to the variables in
my_method() like I can use self for the variables in the class A?

>
I hope there isn't a way to do this that simply. :) Why do you want to
do this, or is it idle curiosity? There is almost surely a better way to
solve your underlying problem.
>
You can *read* your caller's local variables (either pass locals() as an
argument or use inspect to get the frame locals), but writing to this
dictionary has undefined behavior.
--
Michael Hoffman

class A(object):
def early_parse(sel f):
self.result1 = eval("10+5")
def later_parse(A_o bj):
A_obj.result2 = eval("20*2")

a = A()
a.early_parse()
later_parse(a)
print a.result1
print a.result2

[7stud]

Re: can a method access/set another's variables?

On Apr 1, 9:24 pm, "7stud" <bbxx789_0...@y ahoo.comwrote:

On Apr 1, 7:43 pm, Michael Hoffman <cam.ac...@mh39 1.invalidwrote:
>
>
>

asdf1234234 wrote:

-a.py-
import b

>

class A:
def __init__(self):
pass
def my_method(self) :
var = 1
self.var = 2
b.set_var(self)
print var
print self.var

>

my_a = A()
my_a.my_method( )

>

-b.py-
def set_var(self):
var = 2
self.var = 2

>

I want both var and self.var to be 2 at the end. Is there anything I
can pass to set_var() that will give it access to the variables in
my_method() like I can use self for the variables in the class A?

>

I hope there isn't a way to do this that simply. :) Why do you want to
do this, or is it idle curiosity? There is almost surely a better way to
solve your underlying problem.

>

You can *read* your caller's local variables (either pass locals() as an
argument or use inspect to get the frame locals), but writing to this
dictionary has undefined behavior.
--
Michael Hoffman

>
class A(object):
def early_parse(sel f):
self.result1 = eval("10+5")
def later_parse(A_o bj):
A_obj.result2 = eval("20*2")
>
a = A()
a.early_parse()
later_parse(a)
print a.result1
print a.result2

Oops. That def should be:

def later_parse(A_o bj):
A_obj.result2 = A_obj.result1 + eval("20*2")

[7stud]

Re: can a method access/set another's variables?

On Apr 1, 7:56 pm, "wswilson" <wswil...@gmail .comwrote:

I am parsing a document which contains some lines with code I want to
eval or exec. However, due to the complexity of the parsing, I am
splitting it among different methods. So, if I eval something in one
method, it won't be there if I try to access its value a few lines
later since I happen to be in a different method in the parser. Thanks
for the help!

val = None
class A(object):
def early_parse(sel f):
global val
self.result1 = val = eval("10 + 5")
def later_parse():
global val
val += eval("20*2")

a = A()
a.early_parse()
later_parse()
a.result2 = val
print a.result1
print a.result2

[Alex Martelli]

Re: can a method access/set another's variables?

asdf1234234 <wswilson@gmail .comwrote:

My code is:
-a.py-
import b
>
class A:
def __init__(self):
pass

Incidentally, these last two lines are totally, utterly useless. Do NOT
define special methods like this -- just omit the whole def statement
and you'll have identical semantics, no wasted boilerplate, even better
performance.


Alex

[wswilson]

Re: can a method access/set another's variables?

On Apr 2, 1:04 am, a...@mac.com (Alex Martelli) wrote:

asdf1234234 <wswil...@gmail .comwrote:

My code is:
-a.py-
import b

>

class A:
def __init__(self):
pass

>
Incidentally, these last two lines are totally, utterly useless. Do NOT
define special methods like this -- just omit the whole def statement
and you'll have identical semantics, no wasted boilerplate, even better
performance.
>
Alex

I know they're useless. I was using the init method before and just
replaced what I had with pass instead of deleting it because I
expected to use it again later. Thanks for the tip, though.

[wswilson]

Re: can a method access/set another's variables?

On Apr 2, 11:01 am, Dennis Lee Bieber <wlfr...@ix.net com.comwrote:

On 1 Apr 2007 18:36:04 -0700, "asdf123423 4" <wswil...@gmail .com>
declaimed the following in comp.lang.pytho n:
>

My code is:
-a.py-
import b

>

class A:
def __init__(self):
pass

>
Delete this empty __init__() [and, consider converting the class to
new-style]
>

def my_method(self) :
var = 1

>
var is a local to method only name, it goes away when the method
ends.
>

self.var = 2
b.set_var(self)
print var
print self.var

>

my_a = A()
my_a.my_method( )

>

-b.py-
def set_var(self):
var = 2

>
Again, var is local to just set_var().
>

self.var = 2

>

I want both var and self.var to be 2 at the end. Is there anything I
can pass to set_var() that will give it access to the variables in
my_method() like I can use self for the variables in the class A?

>
The common scheme, unless you expect to have multiple instances of
this class with /separate/ local "var", would be to put var in a
"common" module
>
-=-=-=-=- common.py
>
var = None
>
-=-=-=-=-
>
Then have both a.py and b.py "import common", followed by changing
all "var =" to "common.var ="
--
Wulfraed Dennis Lee Bieber KD6MOG
wlfr...@ix.netc om.com wulfr...@bestia ria.com

HTTP://wlfraed.home.netcom.com/

(Bestiaria Support Staff: web-a...@bestiaria. com)
HTTP://www.bestiaria.com/

Thanks! I like the sound of that...it should work for what I need it
to do.