code: def fromZigZag(n):
      return (n >> 1) ^ -(n & 1)
  
imports: from .TProtocol import TType, TProtocolBase, TProtocolException, TProtocolFactory, checkIntegerLimits
  from struct import pack, unpack
  from ..compat import binary_to_str, str_to_binary
label_desc: Use image node_id 3 for calling a global function with example usage: fromZigZag(n) and returns: unknown