fsm | filesystem music player | Music Player library

I have a state machine with several states that are very similar. I could write it for each state, like in the following example:

I experienced a storage issue and then found that my database was taking up 300GB using:

Can you please suggest if it possible and how to define regular expression for the next problem:

I have 2 'binary' strings joined by a delimiter. Let's say the delimiter is always 3.

Example of input data:

I have a dataset where some entries appear more than once, sometimes with data in one entry that is missing in another, sometimes with completely missing data, and sometimes with conflicting data:

I have a a dataset with multiple repeated entries, the entries are largely the same, but with data missing, The missing data could be in any field except for the ID. For example:

I have a fairly complex application involving a GUI front-end and several other classes, several of which are state machines based on the excellent pytransitions library. The application hangs at various times, and being multi-threaded it is difficult to debug, but I have reproduced a minimal example here:

I have a character stream, producing one char each step.

• Step 1: produced character '1', final string '1'
• Step 2: produced character '2', final string '12'
• and so on...

Each step I want to know if the produced final string (sum of every char produced) has possibility to be matched by regexp in the future.

Example regex: ^\d{5}

So the string '123' is not matched by this exact regex, but if the character stream produces two more digits, on the fifth step it would match. But the string 'a12' is already not matched and not possible to be matched in the future.

My question is - is there a possibility to separate those two cases in regex matching engine? This looks like a FSM(finite state machine) task to check if the FSM has successful match, error or is in progress of its matching graph. I know that regex inside is FSM, but I don't know if it is possible to separate not matching case in two different cases as described above.

First i am a lost noob

I have been recently trying to find out a way weather i can send serial data (large file like image data) only through the Rpi w 0's micro USB port using ttyGS0.but when i searched online i only found ways of setting up headless through serial and other stuff which was no what i wanted. But i did follow the tutorial half way

• I went to '/boot/config.txt' and set 'dtoverlay=dwc2' at the end of the file after leaving a line

• I went to '/boot/cmdline.txt' and did put 'modules-load=dwc2,g_serial' after 'rootwait' leaving a space

Thinking i could just use the /dev/ttyGS0 in my serial program on the Rpi and send the data the data was being sent but on my PC when i tried to access my Rpi which was on comport 12 it said port not found and couldn't open it.But it was showing up in the device manager as 'PI USB to Serial(COM12)'

Then i wondered weather it would be possible at all to access Rpi's comport this way.

If that's the case, i want to know if there is any other way to access the Rpi's USB port only using the USB cable

Note:-

• I don't want to use Rpi's USB as a way of loging ie. 'headless setup'.i just want to receive serial data like an arduino.
• I don't want to use the GPIO pins(i tried) as they can only send limited characters at a time and i want to send an image file. Very quickly.
• I don't have any serial converters at hand so i could route it to the arduino and use /dev/ttyUSB0 then read it on PC. I just only want to use the USB cable.
• In case this info is required:-
  • my pc is a probook 6560b running windows 7

things i found while testing and stuff:-

• I did do -lsusb command but i dint find my device on that list
• I tried the 'ls /dev/ttyGS0' and i found '/dev/ttyGS0'
• I checked many forums and some guys were asiking to use this command 'dmesg | grep tty'and show them the code . So i performed it i dont understand what alot in the piece of text means but if it would be helpfull i pasted it here:-

I'm struggling with this for a couple of weeks and need help with understanding and building a state machine for my game.

What I need is something like this:

Basically, FSM class is just for changing states: