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How to remove the text between all curly brackets from text file?


 
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# 1  
Old 07-08-2018
How to remove the text between all curly brackets from text file?

Hello experts,

I have a text file with lot of curly brackets (both opening { & closing } ). I need to delete them alongwith the text between opening & closing brackets' pair.

For ex: Input:-
Code:
59. Rh1 Qe4 {(Qf5-e4 Qd8-g8+ Kg6-f5
Qg8-h7+ Kf5-e5 Qh7-e7+ Ke5-f5 Qe7-d7+ Qe4-e6 Qd7-h7+ Qe6-g6 Qh7-h3+ Kf5-f6
Qh3-c3+ Kf6-f7 Qc3-b3+ Kf7-f6 Qb3-b6+ Kf6-f7 Qb6-b7+ Kf7-f6 Qb7-c6+ Kf6-f7
Qc6-d7+ Kf7-f6 Rh1-h8 Qg6-g7 Qd7-c6+ Kf6-f5 Qc6xc5+ Bf4-e5 Rh8-h7 Qg7-g6
Qc5-c2+ Kf5-f6 Qc2-c6+ Kf6-f5 Qc6-f3+ Be5-f4 Qf3-h3+ g5-g4 Qh3-d3+ Kf5-f6
Qd3-d8+ Kf6-f5 Qd8-d5+ Kf5-f6 Rh7-h8 Bf4-e5 Rh8-f8+ Kf6-e7 Qd5-d8+ Ke7-e6
Rf8-e8+ Qg6xe8 Qd8xe8+ Ke6-f5 Qe8-d7+ Kf5-g5 Qd7-d8+ Kg5-f5 Qd8xa5 Kf5-f4
Qa5-d2+ Kf4-g3 Qd2-e3+ Kg3-g2 Qe3xe5 g4-g3) -132.53/42 7} 60. Qg8+
{(Qd8-g8+ Kg6-f5 Qg8-h7+ Kf5-e5 Qh7-e7+ Ke5-f5 Qe7-d7+ Qe4-e6 Qd7-h7+
Qe6-g6 Qh7-h3+ Kf5-f6 Qh3-c3+ Kf6-f7 Qc3-b3+ Kf7-f6 Qb3-b6+ Kf6-g7 Qb6-b7+
Kg7-f6 Qb7-c6+ Kf6-g7 Qc6-d7+ Kg7-f6 Rh1-h8 Qg6-g7 Qd7-c6+ Kf6-f5 Qc6xc5+
Bf4-e5 Rh8-h7 Qg7-g6 Qc5-f2+ Kf5-g4 Qf2-e2+ Kg4-f5 Qe2-d3+ Kf5-f6 Qd3-f3+
Be5-f4 Qf3-c6+ Kf6-f5 Qc6-c8+ Kf5-e5 Rh7-e7+ Ke5-d5 Qc8-d7+ Bf4-d6 Qd7-b5+
Kd5-d4 Qb5-c6 Bd6xe7 Qc6xg6 Kd4-e5 Qg6-e8 Ke5-d6 Qe8-b8+ Kd6-c6 Qb8-c8+
Kc6-d5 Qc8-f5+ Kd5-d4 Qf5xa5 Kd4-c4) +132.53/37 4} Kf5



Then the expected output:-
Code:
59. Rh1 Qe4 60. Qg8+ Kf5

I tried sed and awk but failed to do so as I'm not at all good with them. Smilie Please help!

Many Thanks!!

Last edited by prvnrk; 07-08-2018 at 06:14 PM..
# 2  
Old 07-08-2018
You could try this awk solution:

Code:
awk '{print $2} NR==1' RS={ FS="}" ORS= infile

or using sed:

Code:
sed ':loop;$!N;$!b loop; :d; s/{[^{}]*}//g; t d' infile

This User Gave Thanks to Chubler_XL For This Post:
# 3  
Old 07-08-2018
Awesome! worked perfectly!! Smilie

Many thanks Chubler_XL Smilie
# 4  
Old 07-08-2018
The awk solution dosn't seem to work very well with nested {}'s, this update might be a bit more accurate:

Code:
awk '{nest++; nest-=NF-1} nest==1 {print $NF}' RS={ FS="}" ORS= infile

# 5  
Old 07-09-2018
Do you have the option to output your PGN file without computer annotation?
# 6  
Old 07-09-2018
Quote:
Originally Posted by wbport
Do you have the option to output your PGN file without computer annotation?
Pardon? What is PGN?
--
Another sed solution that will save some memory, by only reading the needed lines into the input buffer.
Written as a multi-liner (better readable):
Code:
sed '
 :loop
 /{/{
  s/{[^{}]*}//
  t loop
  $!N; $!b loop
 }
' infile

This User Gave Thanks to MadeInGermany For This Post:
# 7  
Old 07-09-2018
PGN is Portable Game Notation is used to record chess games. Files are a-h from the queenside to kingside, ranks are 1-8 from White's side to Black's. Pieces are uppercase KQBNR in English and are different for other languages (e.g., German is KDLST). A move or capture (has an x) not starting with an uppercase symbol is a move by a pawn. The long form includes where the piece came from and a dash before where the piece moved to--in the short form this is missing (Nf3) unless a rank or file is required to keep the move from being ambiguous (Ngf3 if there is also a knight on d2).
I'm leaving other info off for sake of brevity, but it's easy to research for those interested.

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