xlwings call from Excel VBA function produces error - python

The call from EXCEL sub to python using xlwings works fine but wen triggering this same VBA via a VBA function the following error is generated:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "c:\users\a112833\google drive\mytechtests\pulp\mymodule.py", line 13, in energySystemSimulator
wb = Workbook.caller()
File "C:\Python27\lib\site-packages\xlwings\main.py", line 233, in caller
xl_app, xl_workbook = xlplatform.get_open_workbook(fullname, hwnd=sys.argv[4])
File "C:\Python27\lib\site-packages\xlwings\_xlwindows.py", line 142, in get_open_workbook
duplicate_fullnames = get_duplicate_fullnames()
File "C:\Python27\lib\site-packages\xlwings\_xlwindows.py", line 124, in get_duplicate_fullnames
for xl_app in get_xl_apps():
File "C:\Python27\lib\site-packages\xlwings\_xlwindows.py", line 96, in get_xl_apps
xl_app = get_xl_app_from_hwnd(hwnd)
File "C:\Python27\lib\site-packages\xlwings\_xlwindows.py", line 73, in get_xl_app_from_hwnd
return disp.Application
File "C:\Python27\lib\site-packages\win32com\client\dynamic.py", line 522, in __getattr__
raise AttributeError("%s.%s" % (self._username_, attr))
AttributeError: <unknown>.Application
This works:
Sub eSS()
RunPython ("import mymodule; mymodule.eSS()")
End Sub
This breaks with the traceback above (ignore fn. arguments):
Function fnESS(x As Double, y As Double) As Double
Call eSS
fnESS = ActiveWorkbook.Sheets("Config").Range("T10")
End Function
I checked call signature seems exactly the same using VBA sub or function sub call. I can't see what is causing the error.

You're seeing a common trap when writing User Defined Functions: Excel only allows you to write to the calling cells, not outside of it. That's a limitation by Excel, really.
xlwings might offer a workaround for this one day, but right now, there's no official support for this.
As a side note: you might actually be better off writing UDFs by using the xlwings decorators (at least if you are using Windows only), see here.

Related

NameError python api "vishnubob/kinet"

So I am trying to run and learn all about the vishnubob/kinet api.
After I download it I try to run the example script (also after fixing a couple syntax errors) I get this error:
Traceback (most recent call last):
File "example.py", line 31, in <module>
pds = PowerSupply("192.168.1.121")
NameError: name 'PowerSupply' is not defined
I have no clue why this is happening, as the imports look good (to me at least).
If someone knows why or can point me to the right direction then I would be grateful.
The clue here is "fixing syntax errors". That code has been written for Python 2, and it uses a thing called implicit relative import which was removed in Python 3. Namely the line in kinet/__init__.py
from kinet import *
is trying to import from the top-level package in Python 3, when Python 2 defaulted to importing from a local module first (kinet/kinet.py). The fix is to change this to
from .kinet import *
However this leads down the rabbit hole, as kinet.py has more syntax errors, after which it just fails spectacularly with
Traceback (most recent call last):
File "example.py", line 31, in <module>
pds = PowerSupply("192.168.1.121")
File "./kinet/kinet.py", line 227, in __init__
self.header = Header()
File "./kinet/kinet.py", line 22, in __init__
self._struct = struct.Struct(self.struct_format)
File "./kinet/kinet.py", line 61, in __setattr__
if key not in self.Keys:
File "./kinet/kinet.py", line 56, in __getattr__
if key not in self.Keys:
File "./kinet/kinet.py", line 56, in __getattr__
if key not in self.Keys:
File "./kinet/kinet.py", line 56, in __getattr__
if key not in self.Keys:
[Previous line repeated 325 more times]
RecursionError: maximum recursion depth exceeded while calling a Python object
It is a bad piece of code written using all the syntax that was deprecated already in Python 2.6. I'd look for a Python 3 rewrite instead of trying to fix that.

Python:Pycall Validation Error while Calling

I have Asterisk 13.20 set up and running fine on Ubuntu 16.04,calls are going well through a Softphone(Zoiper), I came across a Library in Python "Pycall" which lets you make calls through a Python Script.So I tried testing a snippet from the site Pycall
The code that I used:
from pycall import CallFile, Call, Application
call = Call('SIP/flowroute/18882223333')
action = Application('Playback', 'hello-world')
c = CallFile(call, action)
c.spool()
Just made changes in the extension,wherein I used one from my server
However I am getting the following error:
Traceback (most recent call last):
File "test.py", line 10, in <module>
c.spool()
File "/usr/local/lib/python2.7/dist-packages/pycall/callfile.py", line 131, in spool
self.writefile()
File "/usr/local/lib/python2.7/dist-packages/pycall/callfile.py", line 119, in writefile
f.write(self.contents)
File "/usr/local/lib/python2.7/dist-packages/pycall/callfile.py", line 114, in contents
return '\n'.join(self.buildfile())
File "/usr/local/lib/python2.7/dist-packages/pycall/callfile.py", line 96, in buildfile
raise ValidationError
pycall.errors.ValidationError
Tried searching online for the solution but coudnt find one,What am I doing wrong?
This question not related to PBX, it is just incorrect use of LIB.
General instruction how to solve ANY issue with availible source code.
You have error
File "/usr/local/lib/python2.7/dist-packages/pycall/callfile.py", line 96, in buildfile
Go that file and line, check code, add more debug if needed, fix your app.
Run as asterisk user.
sudo su asterisk -s /bin/bash
python
from pycall import CallFile, Call, Application
call = Call('SIP/flowroute/18882223333')
action = Application('Playback', 'hello-world')
c = CallFile(call, action)
c.spool()

Uncompyle2 issue: array indices must be integers

I have an issue when I am trying to decompile a .pyc file.
The traceback is the following:
Traceback (most recent call last):
File "my.py", line 4, in <module>
uncompyle2.uncompyle_file("/home/user/Downloads/asd.pyc", fileobj)
File "/home/user/Desktop/uncompyle2/uncompyle2/__init__.py", line 130, in uncompyle_file
uncompyle(version, co, outstream, showasm, showast, deob)
File "/home/user/Desktop/uncompyle2/uncompyle2/__init__.py", line 93, in uncompyle
tokens, customize = scanner.disassemble(co, deob=deob)
File "/home/user/Desktop/uncompyle2/uncompyle2/Scanner.py", line 214, in disassemble
cf = self.find_jump_targets(code)
File "/home/user/Desktop/uncompyle2/uncompyle2/Scanner.py", line 926, in find_jump_targets
self.detect_structure(i, op)
File "/home/user/Desktop/uncompyle2/uncompyle2/Scanner.py", line 737, in detect_structure
if int(self.code[jmp]) == RETURN_VALUE:
**TypeError: array indices must be integers**
Any ideas about this ?
I'm using Python 2.7.6 on a Ubuntu machine.
The command that I'm running to have this work is the following:
uncompyle2 asd.pyc
//EDIT: As far as I can tell, this happens only on a specific file(asd.py). It works on other files.
Any workaround ?
The .pyc file that you're trying to decompile is probably obfuscated. It's not uncompyle2s job to also deofuscate the file.
Try something else like pyc2py. Maybe it will work.

Why does Python refuse to execute this code in a new subprocess?

I am trying to make a very simple application that allows for people to define their own little python scripts within the application. I want to execute the code in a new process to make it easy to kill later. Unfortunately, Python keeps giving me the following error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.7/dist-packages/spyderlib/widgets/externalshell/sitecustomize.py", line 540, in runfile
execfile(filename, namespace)
File "/home/skylion/Documents/python_exec test.py", line 19, in <module>
code_process = Process(target=exec_, args=(user_input_code))
File "/usr/lib/python2.7/multiprocessing/process.py", line 104, in __init__
self._args = tuple(args)
TypeError: 'code' object is not iterable
>>>
My code is posted below
user_input_string = '''
import os
world_name='world'
robot_name='default_body + os.path.sep'
joint_names=['hingejoint0', 'hingejoint1', 'hingejoint2', 'hingejoint3', 'hingejoint4', 'hingejoint5', 'hingejoint6', 'hingejoint7', 'hingejoint8']
print(joint_names)
'''
def exec_(arg):
exec(arg)
user_input_code = compile(user_input_string, 'user_defined', 'exec')
from multiprocessing import Process
code_process = Process(target=exec_, args=(user_input_code))
code_process.start()
What am I missing? Is there something wrong with my user_input_string? With my compile options? Any help would be appreciated.
I believe args must be a tuple. To create a single-element tuple, add a comma like so: args=(user_input_code,)

Strange exception with python's cgitb and inspect.py

I have a function that decodes an exception and pushes the info to a file. Following is what I do basically:
exc_info = sys.exc_info
txt = cgitb.text(exc_info)
Using this, I got the following exception trace:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\site-packages\job_queue\utils\start_workers.py", line 40, in start_worker
worker_loop(r_jq, worktype, worker_id)
File "C:\Python27\lib\site-packages\job_queue\server\jq_worker.py", line 55, in worker_loop
_job_machine(*job)
File "C:\Python27\lib\site-packages\job_queue\server\jq_worker.py", line 34, in _job_machine
do_verbose_exception()
File "C:\Python27\lib\site-packages\job_queue\server\errors.py", line 23, in do_verbose_exception
txt = cgitb.text(exc_info)
File "C:\Python27\lib\cgitb.py", line 214, in text
formatvalue=lambda value: '=' + pydoc.text.repr(value))
File "C:\Python27\lib\inspect.py", line 885, in formatargvalues
specs.append(strseq(args[i], convert, join))
File "C:\Python27\lib\inspect.py", line 840, in strseq
return convert(object)
File "C:\Python27\lib\inspect.py", line 882, in convert
return formatarg(name) + formatvalue(locals[name])
KeyError: 'connection'
I ran the code multiple times after this exception, but couldn't reproduce it. However, I didn't find any reference in files cgitb.py or inspect.py to a dict with 'connection' key either.
Will anybody know if this is an issue with python's cgitb or inspect files? Any helpful inputs?
You passed a wrong type to text function
below is the correct way.
cgitb.text((sys.last_type, sys.last_value, sys.last_traceback))
Im not sure specifically why this exception is happening, but have you read the docs for cgitb module? It seems that since python 2.2 it has supported writing exceptions to a file:
http://docs.python.org/library/cgitb.html
Probably something like:
cgitb.enable(0, "/my/log/directory") # or 1 if you want to see it in browser
As far as your actual traceback, are you sure 'connection' isnt a name you are using in your own code? 'inspect' module is most likely trying to examine your own code to build the cgi traceback info and getting a bad key somewhere?

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