use 'with' lock syntax instead of acquire/release

lib/hidapi/hidconsole.py

@@ -56,7 +56,9 @@ def _print(marker, data, scroll=False):
 		hexs = strhex(data)
 		s = '%s (% 8.3f) [%s %s %s %s] %s' % (marker, t, hexs[0:2], hexs[2:4], hexs[4:8], hexs[8:], repr(data))
 
-	print_lock.acquire()
+	with print_lock:
+		# allow only one thread at a time to write to the console, otherwise
+		# the output gets garbled, especially with ANSI codes.
 
 		if interactive and scroll:
 			# scroll the entire screen above the current line up by 1 line
@@ -72,8 +74,6 @@ def _print(marker, data, scroll=False):
 		else:
 			sys.stdout.write('\n')
 
-	print_lock.release()
-
 
 def _error(text, scroll=False):
 	_print("!!", text, scroll)