import sys
import pdb
import os

def main_print(content):
    if int(os.environ['LOCAL_RANK']) <= 0: 
        print(content)

#ForkedPdb().set_trace()
class ForkedPdb(pdb.Pdb):
    """A Pdb subclass that may be used
    from a forked multiprocessing child

    """
    def interaction(self, *args, **kwargs):
        _stdin = sys.stdin
        try:
            sys.stdin = open('/dev/stdin')
            pdb.Pdb.interaction(self, *args, **kwargs)
        finally:
            sys.stdin = _stdin