dictd | server software , human language dictionary databases

Your PRINT token can only be matched by the blk_expr rule through this path:

There is no path for retblock_expr to recognize anything that begins with the PRINT token.

As a result, it will not matter which order you have elk_expr or retblock_expr.

There is no parser rule in your grammar that will match a PRINT token followed by a LPR token. a block_expr is matched by the program rule, and it only matches (ignoring wsp) block_expr or retblock_expr. Neither of these have alternatives that begin with an LPR token, so ANTLR can't match that token.

print(...) would normally be matched as a function call expression that accepts 0 or more comma-separated parameters. You have no sure rule/alternative defined. (I'd guess that it should be an alternative on either retblock_expr or block_expr

That's the immediate cause of this error. ANTLR really does not have any rule/alternative that can accept a LPR token in this position.

Both global and a are listed in your grammer under kwr rule.

kwr is mentioned in the inl rule which isn't used anywhere. So your parser don't know how to deal with inl and don't know what to do with two inl chained together (global a)

This code below will do the trick:

Can't understand the second for loop the temp_list is created at every iteration as empty list, then why do you need to do this lis = tuple(set(temp_list)) instead read it in a variable name :

You just need to reshape your output from tf.gather as explained in this answer:

Your method is called writeLine but it doesn't write a line, unless the string already has a line terminator. Add one.