You are trying to create a process from one action (one http request)
and access it from another one. This is what pexpect is for.
I have neve used it before. The problem is that objects create in one
request are not persistant unless you say do.
There are two mechanisms for persistance: session and cache.
1) try session
def do_file(param1):
if param1 == 'create':
session.child=pexpect.spawn('nano -wc myfile.txt')
else:
session.child.sendline(param1)
session.child.close()
will work if and only if child is pickable else you will get an error.
2) try cache.ram
def do_file(param1):
if param1 == 'create':
filename='myfile.txt'
child=cache.ram(filename,lambda:pexpect.spawn('nano -wc
'+filename),0) #update cache
else:
# retrieve from cache without expiration
child=cache.ram(filename,lambda:None,10**10) #cache forver
child.sendline(param1)
child.close()
this will work as long as you have only one process running web2py.
On Nov 17, 12:26 pm, artien <[EMAIL PROTECTED]> wrote:
> Hello,
>
> I'm trying to use pexpect from web2py with limited success. What I
> notice is that web2py doesn't treat the object like a normal python
> program would.
>
> A simple example (my real program creates ssh sessions this is just to
> demonstrate the issue):
>
> with ajax I call two functions:
>
> first it calls
> def open_file():
> do_file('create')
> message = 'created'
> return dict(message=message)
>
> then it calls
> def data_file():
> info =request.vars.values()[0]
> do_file('hello this program is crap)
> message = 'stored info into file'
> return dict(message=mesage)
>
> Then we have the controller function which does it
>
> def do_file(param1):
> if param1 == 'create':
> child=pexpect.spawn('nano -wc myfile.txt')
> else:
> child.sendline(param1)
> child.close()
>
> Now it says that the second time:
>
> UnboundLocalError: local variable 'child' referenced before assignment
>
> When I try to store the child object in a session variable I get the
> error that it can't store file objects.
>
> Is there anyway I can make web2py keep its reference to the object so
> I can keep using it?
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