add main method

pypcc/pypcc.py

@@ -7,6 +7,8 @@ import threading
 import time
 from pypcc.simpleflock import simpleflock
 
+
+def main():
     parser = argparse.ArgumentParser()
     parser.add_argument("-s", "--simulator", help="Do not connect to I2c, but simulate behaviour.", action="store_true")
     parser.add_argument("-t", "--test", help="Do not start OPC-UA server.", action="store_true")