Please remove the waiting after a Wire.requestFrom().
These lines: while(Wire.available() < 6);
Explanation: Common-mistakes#1
Those lines are in the files "Self-Balancing-Segway-Robot/Arduino_Implementation/Fresh_Bal_Bot/Fresh_Bal_Bot.ino" and "Self-Balancing-Segway-Robot/Arduino_Files/Arduino_Python_Communication.ino".
Please remove the waiting after a Wire.requestFrom(). These lines:
while(Wire.available() < 6);
Explanation: Common-mistakes#1 Those lines are in the files "Self-Balancing-Segway-Robot/Arduino_Implementation/Fresh_Bal_Bot/Fresh_Bal_Bot.ino" and "Self-Balancing-Segway-Robot/Arduino_Files/Arduino_Python_Communication.ino".