[Bug] LexerNoViableAltException: word.p=a|b (error comes from the vertical bar)

[zhaoyanpeng]

hi there,

looks hydra does not support escaping a vertical bar? I checked the doc and it says

... by escaping them with a \. These characters are: \()[]{}:=, \t (the last two ones being the whitespace and tab characters).

any reason for not escaping vertical bar? one of my running parameters is a regex expression, which contains a vertical bar, but I cannot send it in from the command line, e.g, python main.py word.p=a\|b

[Jasha10]

I can reproduce the issue:

$ cd ~/hydra.git/examples/tutorials/basic/your_first_hydra_app/1_simple_cli/
$ python my_app.py '+foo=ab'
foo: ab

$ # with unescaped bar:
$ python my_app.py '+foo=a|b'
LexerNoViableAltException: +foo=a|b
                                 ^
...

$ # with escaped bar:
$ python my_app.py '+foo=a\|b'
LexerNoViableAltException: +foo=a\|b
                                  ^
...

[jieru-hu]

the following works for me:

$ python examples/tutorials/basic/your_first_hydra_app/2_config_file/my_app.py '+foo="a|b"'
db:
  driver: mysql
  user: omry
  password: secret
foo: a|b

[zhaoyanpeng]

thanks @jieru-hu , that works! quoting only the right-hand-side also works: python main.py word.p='"a|b"'