+def obey(cmd, io_db, prefix):
+ """"""
+ print("input " + prefix + ": " + cmd)
+ try:
+ tokens = shlex.split(cmd, comments=True)
+ except ValueError as err:
+ print("Can't tokenize command string: " + str(err) + ".")
+ return
+ if 0 == len(tokens):
+ pass
+ elif "PING" == tokens[0] and 1 == len(tokens):
+ io_db["file_out"].write("PONG\n")
+ elif "QUIT" == tokens[0] and 1 == len(tokens):
+ record("# " + cmd, path_recordfile)
+ raise SystemExit("received QUIT command")
+ elif "MAKE_WORLD" == tokens[0] and 2 == len(tokens):
+ print("I would generate a new world now, if only I knew how.")
+ record(cmd, io_db)
+ else:
+ print("Invalid command/argument, or bad number of tokens.")
+
+
+def record(cmd, io_db):
+ """Append cmd string plus newline to file at path_recordfile. (Atomic.)"""
+ # This misses some optimizations from the original record(), namely only
+ # finishing the atomic write with expensive flush() and fsync() every 15
+ # seconds unless explicitely forced. Implement as needed.
+ path_tmp = io_db["path_record"] + io_db["tmp_suffix"]
+ if os.access(io_db["path_record"], os.F_OK):
+ shutil.copyfile(io_db["path_record"], path_tmp)
+ file = open(path_tmp, "a")
+ file.write(cmd + "\n")
+ file.flush()
+ os.fsync(file.fileno())
+ file.close()
+ if os.access(io_db["path_record"], os.F_OK):
+ os.remove(io_db["path_record"])
+ os.rename(path_tmp, io_db["path_record"])
+
+
+def obey_lines_in_file(path, name, break_test = None):
+ """Call obey() on each line of path's file, use name in input prefix.
+
+ If break_test function is set, only read the file until it returns True.
+ """
+ file = open(path, "r")
+ line_n = 1
+ for line in file.readlines():
+ if None != break_test and break_test():
+ break
+ obey(line.rstrip(), io_db, name + "file line " + str(line_n))
+ line_n = line_n + 1
+ file.close()
+
+
+def make_turn_tester(turn_to_compare, world_db):
+ """Return tester whether world_db["turn"] greater/equal turn_to_compare."""
+ def turn_tester():
+ return world_db["turn"] >= turn_to_compare
+ return turn_tester
+
+
+
+def parse_command_line_arguments():
+ """Return settings values read from command line arguments."""