# What can a URCap Python demon do?

**URL:** https://forum.universal-robots.com/t/what-can-a-urcap-python-demon-do/4473
**Category:** URCaps SDK
**Created:** [June 7, 2019, 1:34pm UTC](https://forum.universal-robots.com/t/what-can-a-urcap-python-demon-do/4473 "2019-06-07T13:34:25Z")
**Posts on this page:** 3
**Page:** 1

<div class="post-metadata">

### Author: ![anon57454834](https://avatars.discourse-cdn.com/v4/letter/a/f07891/32.png) [@anon57454834](https://forum.universal-robots.com/u/anon57454834)
#### Post date: [June 7, 2019, 1:34pm UTC](https://forum.universal-robots.com/t/what-can-a-urcap-python-demon-do/4473/1 "2019-06-07T13:34:25Z")

</div>

I would like to use a URCap (with Python demon) to read (and write) filees over the network from within UR Script (with xmlrpc).  
At the moment I am playing around with the simulator in a virtual machine (URSim\_VIRTUAL\_5.3.1.64192)

My questions:

1. In which environment/machine will the demon run? Is it the same as the virtual machine or does it run on another machine?
2. Will I have all the commands available, that I also would have available in the virtual machines (using Python 2)?
3. I would prefer Python 3. Will this be possible? When?
4. In order to read a file from a file server I would use the command “smbclient” (to copy the file to a local directory). Would it also be possible to change the smb.conf file to access the file server directly?

---

<div class="post-metadata">

### Author: ![sko](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.universal-robots.com/sko/32/573_2.png) [@sko](https://forum.universal-robots.com/u/sko)
#### Post date: [June 13, 2019, 8:23am UTC](https://forum.universal-robots.com/t/what-can-a-urcap-python-demon-do/4473/2 "2019-06-13T08:23:30Z")

</div>

Hi,

regarding your questions:

1. The Daemon process will run on the same virtual machine.
2. The packages/libraries you have available on your VM are not necessarily also available on the real Robot.
3. Currently only Python 2 is used.
4. Samba is not installed on the robot. I would direct you to using FTP instead.

---

<div class="post-metadata">

### Author: ![anon57454834](https://avatars.discourse-cdn.com/v4/letter/a/f07891/32.png) [@anon57454834](https://forum.universal-robots.com/u/anon57454834)
#### Post date: [June 24, 2019, 8:14am UTC](https://forum.universal-robots.com/t/what-can-a-urcap-python-demon-do/4473/3 "2019-06-24T08:14:50Z")

</div>

Thanks for your answers. My remarks:

1. OK
2. OK. This means, I have to wait for the real machine to see, which packages/libs I can use.
3. OK. Not nice, but OK. Are there plans to migrate? When will this happen?
4. I want to develop a drop-in replacement into an existing system. So: ftp is not an option for me. If I cannot use smb, then I will use a listening socket in the python daemon to read the data directly  
.