MacLogger script to print pretty signals without time to a file

MacLogger script

import subprocess, os, sys

from varints import uvarintRead, uvarintsDecode


def main():
    
    signalName = sys.argv[1]
    
    signal_repr = {
        'mouse-pos': mouse_pos,
        'input-idle': input_idle,
        'front-window': front_window,
    }[signalName]
    
    
    signalDir = os.path.expanduser('~/Library/Application Support/MacLogger/signals/%s' % signalName)
    path = '%s/%s' % (signalDir, list(sorted(os.listdir(signalDir)))[-1])
    #p = subprocess.Popen(['tail', '-n', '0', '-f', path], stdout=subprocess.PIPE)
    #f = p.stdout
    try:
        f = open(path, 'rb')
        print path
        while True:
            msDelta = uvarintRead(f)
            dataLength = uvarintRead(f)
            data = f.read(dataLength)
            print '[t += %.4d]: %s' % (msDelta, signal_repr(data))
            msDeltaTime = '%.4d' % msDelta
            
            try:
                # This tries to open an existing file but creates a new file if necessary.
                logfile = open("log2.txt", "a")
                logfile.write(signal_repr(data) + '\n')
                logfile.close()
            except:
                pass
    except:
        pass

def mouse_pos(data):
    (x, y) = uvarintsDecode(data)
    return '%d,%d' % (x, y)


def input_idle(data):
    (value,) = uvarintsDecode(data)
    return '%d' % value


def front_window(data):
    return data


if __name__ == '__main__':
    main()