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I am trying to communicate with an Allen Bradley L16ER PLC via python. What I've found online says that I should use either CPPPO or pycomm modules to accomplish this. I have looked for a good source of documentation for these, and was unable to find one. Is there a good place to find an explanation of the basics of how to use either of these? Also, is there an alternative solution that may work better?
To further define my problem, let's define understanding of using this module into three layers.
Understanding Python.
Understanding how PLCs communicate.
Understanding how to use these modules.
While I understand level 1, I don't understand level 2. This makes it very hard to understand level 3.
You can look at pylogix, it has some example code for it:
https://github.com/dmroeder/pylogix
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I need to import this python project to Unity3d. How can i do that? Based on my search, i see that there are plugins like this. However, i need to perform this tasks without using any plugin? How should i do that, i am experienced in Unity but i have no python experience? Can i get .dlls from python project so that i can use the .dlls in Unity. Or should i do something else?
If someone lead me, i'd appereciate.
I'm not sure if you can. I know that's not what you're looking for, and don't let me discourage you, but start looking for another answer. I've been trying for a while now, and even with plugins the best I could do cost about $40, and that guy spent about a year working on it. Maybe try manually converting it to C#?
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I recently started working in a lab that generate a lot of data. I need to manipulate files very often for various needs. I have learnt awk programming but it seems not enough for my work. I know python but not to that extent where I can comfortably work on files. Could anyone please suggest to me any book or online tutorial where I can find exclusively the use of Python on files. most of the python books do not dwell intensively on this subject.
thanks
You can find these materials are helpful:
http://www.diveintopython.net/file_handling/file_objects.html
http://opentechschool.github.io/python-data-intro/core/text-files.html
For data manipulation, you may need to improve your skills in string processing, regular expression operations, data structures,....
You can attend this course:
https://www.edx.org/course/introduction-python-data-science-microsoft-dat208x-0
I would recommend familiarizing yourself with the os and sys standard libraries. Here is a comprehensive tutorial that covers both libraries and other necessary aspects of file management in Python.
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I need simple ping that will return some float number or None if destination unreachable. I am using Python 3 and windows and don't want to use standart ping, cause i have to decode bytes from shell and parse results. I know nothing about implementation of ICMP protocol so ready to use library is the best choice.
You could use a pure Python implementation like the following:
https://pypi.python.org/pypi/ping
or if you prefer this one:
http://www.python.org/~jeremy/python.html
and also take a look here, because they are discussing about the subject and you may find it useful:
python non-privileged ICMP
UPDATE
Without the need of patching for Py 3, a very simple example:
https://github.com/volftomas/pyicmp
Active State Recipes is always the first place when I want to find such tiny/common/useful code snippets.
Here's one:
icmplib (Python recipe)
It works in Python3,
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I'm having a really hard time finding a good comprehensive source for Mechanize's documentation. Even the main documentation on mechanize's site isn't really that great: it only seems to list examples.
Is there a more formal place for documentation where I can see lists of classes and methods for this module? I'm a bit new to python, so maybe there's a simple answer for this.
More specifically I need a good source of information for mechanize.Browser(), which I've only been able to find information on through random questions on Stack Overflow.
UPDATED:
How about
https://github.com/python-mechanize/mechanize
prior answer: A google search turned up the below, courtesy of one Joe. He parsed the source through pydoc and posted the generated results. Nice one, Joe.
http://joesourcecode.com/Documentation/mechanize0.2.5/
http://joesourcecode.com/Documentation/mechanize0.2.5/mechanize._mechanize.Browser-class.html
If you're not happy with mechanize's site, then I'm afraid the best you can do is look at the examples you've found or at the code from the library ifself.
Regarding mechanize.Browser if you take a look at the code, then you'll see:
class Browser(UserAgentBase):
class UserAgentBase(_opener.OpenerDirector):
class OpenerDirector(urllib2.OpenerDirector):
So, for starters, you can assume that a mechanize.Browser object is just a specialized urllib2.OpenerDirector.
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I would like to generate Python Expect (pexpect) code automatically, does something like autoexpect exist for pexpect?
I have written one:
https://github.com/ianmiell/autopexpect
which works in very basic form. Please contribute if you can!
Use it much the same way as autoexpect:
./autoexpect
[your session]
[exit session]
./script.py
As with autoexpect, you may need to fiddle with the produced script.
Not really, AFAIK, but you could use expy AKA expectpy, rather than pexpect, if you depend on autoexpect's functionality. There's nothing conceptually standing in the way of implementing a pyautoexpect -- it's just that, as far as I know, nobody's taken the trouble of doing it (since I've never felt a need for autoexpect myself, I'm not really surprised;-).