def inject_print_functions(module_name=None, module_prefix='[???]',
                           DEBUG=False, module=None):
    """
    makes print functions to be injected into the module
    """
    module = _get_module(module_name, module)
    if SILENT:
        def print(*args):
            """ silent builtins.print """
            pass
        def printDBG(*args):
            """ silent debug print """
            pass
        def print_(*args):
            """ silent stdout.write """
            pass
    else:
        if DEBUG_PRINT:
            # Turns on printing where a message came from
            def print(*args):
                """ debugging logging builtins.print """
                from utool._internal.meta_util_dbg import get_caller_name
                calltag = ''.join(('[caller:', get_caller_name(N=DEBUG_PRINT_N), ']' ))
                util_logging._utool_print()(calltag, *args)
        else:
            def print(*args):
                """ logging builtins.print """
                util_logging._utool_print()(*args)

        if __AGGROFLUSH__:
            def print_(*args):
                """ aggressive logging stdout.write """
                util_logging._utool_write()(*args)
                util_logging._utool_flush()()
        else:
            def print_(*args):
                """ logging stdout.write """
                util_logging._utool_write()(*args)

        # turn on module debugging with command line flags
        dotpos = module.__name__.rfind('.')
        if dotpos == -1:
            module_name = module.__name__
        else:
            module_name = module.__name__[dotpos + 1:]
        def _replchars(str_):
            return str_.replace('_', '-').replace(']', '').replace('[', '')
        flag1 = '--debug-%s' % _replchars(module_name)
        flag2 = '--debug-%s' % _replchars(module_prefix)
        DEBUG_FLAG = any([flag in sys.argv for flag in [flag1, flag2]])
        for curflag in ARGV_DEBUG_FLAGS:
            if curflag in module_prefix:
                DEBUG_FLAG = True
        if __DEBUG_ALL__ or DEBUG or DEBUG_FLAG:
            print('INJECT_PRINT: %r == %r' % (module_name, module_prefix))
            def printDBG(*args):
                """ debug logging print """
                msg = ', '.join(map(str, args))
                util_logging.__UTOOL_PRINTDBG__(module_prefix + ' DEBUG ' + msg)
        else:
            def printDBG(*args):
                """ silent debug logging print """
                pass
    #_inject_funcs(module, print, print_, printDBG)
    print_funcs = (print, print_, printDBG)
    return print_funcs