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How to use python to access DOORS content?

I want to access DOORS content using python.
I have read this answer , but it did not give clear instructions.

The general information you can get from the link is: "there is no direct way to get information about DOORS content using Python". The only reliable way to get information from DOORS is by writing and starting a DXL script.
You might want to start this DXL script from "outside", e.g. using Python and after it is finished you can get the result from that script.
This post sums it up quite well: Rational Doors 9.6 interfacing with C#
(C# is interchangeable with any other language here).
Your python program will possibly contain something like
import subprocess
subprocess.call([r'C:\Program Files\ibm\Rational\DOORS\9.6\bin\doors.exe', '-dxl', r'C:\Users\Hazem\Desktop\DOORSScript\Doors2xml.dxl', '-user', 'Hazem', '-password', 'test'])
While your DXL file might create e.g. an .XML or .CSV file at a predefined location and then your script will read the content of this file and do whatever you want to do with it (you could also catch the script's STDOUT, but that ususally brings more problems).
You can pass parameters to a DXL script using environment variables, in DXL there is a perm string getenv (string var) to get these.

integrating a web server into a python script

I have written a program to generate sequences that pass certain filters (the exact sequences etc don't matter). Each sequence is generated by making a random string of 40 characters made up of C, G, T or A. When each string is generated, it is put through a set of filters, and if it passes the filters it is saved to a list.
I am trying to make one of those filters include an online tool, BPROM, which doesn't appear to have a python library implementation. This means I will need to get my python script to send the sequence string described above to the online tool, and save the output as a python variable.
My question is, if I have a url to the tool (http://www.softberry.com/berry.phtml?topic=bprom&group=programs&subgroup=gfindb), how can I interface my script that generates the sequences, with the online tool - is there a way to send data to the web tool and save the tool's output as a variable? I've been looking into requests but i'm not sure it is the right way to approach this (as a massive python/coding noob).
Thanks for reading, I'm a bit brain dead so I hope this made sense :P

Of course, you can use requests or urllib
Here is demo code:
with urllib.request.urlopen('http://www.softberry.com/berry.phtml?topic=bprom&group=programs&subgroup=gfindb') as response:
html = response.read()

How to change multiple lines using web forms in python?

I have a text file that contains something like this :
host host_name {
# comment (optional)
hardware ethernet 01:22:85:EA:A8:5D;
fixed-address 192.168.107.210;
}
host another_host_name {
# comment (optional)
hardware ethernet 01:22:85:EA:A8:5D;
fixed-address 192.168.107.210;
}
I want my program to detect the line with the 'host' and then modify the content of the block according to what I type.
When I do the following (for example with request.form.get('name') in flask):
#random inputs
host = name2
comment = nothing
hardware = 00:00:00:00:00:00
address = 192.168.101.123
I would like to have :
host host_name {
# comment (optional)
hardware ethernet 01:22:85:EA:A8:5D;
fixed-address 192.168.107.210;
}
#after the change
host name2 {
# nothing
hardware ethernet 00:00:00:00:00:00;
fixed-address 192.168.101.123;
}
I don't have a problem with regex but rather the program that I have to do in order to achieve this, so how can I do it?

If you start to cod e the way you are thinking about your problem, you will likely have a complete and utter mess no ne can change or maintain, even if it works at first.
You have several different small tasks, and you are thinking of them "as one thing".
No. You are using Falsk to provide you an easy and light-weight web interface. That is ok. You already know how to get a text block from it. You don't need to ask anything about Flask now. Nor tio put any further code in the same place the code that gets data from the web is.
Instead just write some plain Python functions that will get your textual data as parameters, and then update the configuration files for you.
And while at that, if you can pick an special template and create a new config file when doing this, instead of trying to parse an existing file, and update your desired values in place, then, this is something you can achieve.
Parsing a "real world" config file in place and live update it is not an easy task. Actually it can be so complicated that most Linux distributions skipped trying that for more than 10 years.
And then you have a further complication you don't mention: you probably want to keep any configurations you are not changing on the file. I was to advise you to keep a template of the file, and fill in your data, creating a new file on each run. But that would require you to have all the other config data in some other format, which would basically duplicate your problem.
So, ok, your idea of "getting data from the original file" with regular expressions might be a go. But still, keep it separate from writing back the file. And don't think in "lines" if said file is structured in blocks.
One feasible thing would be to read the file, get the data you are interested in into a Python data-structure (for example, a list of dictionaries, each one having your host_name, comment, ethernet and ip fields). And, in a second apply of the same regex, change all those for placeholders , so that the file contents could be filled back in by a call to the .format method, or using Flask's jinja2 templating.
Separating the above in 2 functions will even allow you to present all the configured hosts on your web interface, so the user can edit then individually without having to type ethernet addresses by hand.
Sorry, but i won be writing all this code for you. I hope the above can help you think about a proper approach there. So, if later you come up with other questions, with some code from your attempts, we can help you further.

Using python to measure Wi-Fi

I am working on a school project in which I must measure and log Wi-Fi (I know how to log the data, I just don't know the most efficient way to do it). I have tried using by using
subproject.check_output('iwconfig', stderr=subprocess.STDOUT)
but that outputs bytes, which I really don't want to deal with (and I don't know how to, either, so if that is the only option, then can someone explain how to handle bytes). Is there any other way, maybe to get it in plain text? And please do not just give me the code I need, tell me how to do it.
Thank you in advance!

You are almost there. I assume that you are using python 3.x. iwconfig is sending you text encoded in whatever character set your terminal uses. That encoding is available as sys.stdin.encoding. So just put it together to get a string. BTW, you want a command list instead of a string.
raw = subprocess.check_output(['iwconfig'],stderr=subprocess.STDOUT)
data = raw.decode(sys.stdin.encoding)

Python and downloading Google Sheets feeds

I'm trying to download a spreadsheet from Google Drive inside a program I'm writing (so the data can be easily updated across all users), but I've run into a few problems:
First, and perhaps foolishly, I'm only wanting to use the basic python distribution, so I'm not requiring people to download multiple modules to run it. The urllib.request module seems to work well enough for basic downloading, specifically the urlopen() function, when I've tested it on normal webpages (more on why I say "normal" below).
Second, most questions and answers on here deal with retrieving a .csv from the spreadsheet. While this might work even better than trying to parse the feeds (and I have actually gotten it to work), using only the basic address means only the first sheet is downloaded, and I need to add a non-obvious gid to get the others. I want to have the program independent of the spreadsheet, so I only have to add new data online and the clients are automatically updated; trying to find a gid programmatically gives me trouble because:
Third, I can't actually get the feeds (interface described here) to be downloaded correctly. That does seem to be the best way to get what I want—download the overview of the entire spreadsheet, and from there obtain the addresses to each sheet—but if I try to send that through urlopen(feed).read() it just returns b''. While I'm not exactly sure what the problem is, I'd guess that the webpage is empty very briefly when it's first loaded, and that's what urlopen() thinks it should be returning. I've included what little code I'm using below, and was hoping someone had a way of working around this. Thanks!
import urllib.request as url
key = '1Eamsi8_3T_a0OfL926OdtJwLoWFrGjl1S2GiUAn75lU'
gid = '1193707515'
# Single sheet in CSV format
# feed = 'https://docs.google.com/spreadsheets/d/' + key + '/export?format=csv&gid=' + gid
# Document feed
feed = 'https://spreadsheets.google.com/feeds/worksheets/' + key + '/private/full'
csv = url.urlopen(feed).read()
(I don't actually mind publishing the key/gid, because I am planning on releasing this if I ever finish it.)

Requres OAuth2 or a password.
If you log out of google and try again with your browser, it fails (It failed when I did logged out). It looks like it requires a google account.
I did have it working with and application password a while ago. But I now use OAuth2. Both are quite a bit of messing about compared to CSV.

This sounds like a perfect use case for a wrapper library i once wrote. Let me know if you find it useful.