i can not use xidle with file about xidel

[Freezystem]

Indeed, I just tried it myself and got:

**** Retrieving: file.html ****
An unhandled exception occurred at $000000000047DF55:
EFOpenError: Unable to open file "file.html"
  $000000000047DF55
  $000000000047DD54
  $000000000045E9E2

I'll investigate shortly

[Freezystem]

Don't know yet if it's related but reading from stdin does not work either:
cat file.html | docker run --rm -it freezystem/xidel - -e "//title"

the input device is not a TTY

Tried both commands within the docker container and it works so it must be a docker related issue.
I'll investigate in this way first.

[Freezystem]

Ok, so the syntax was wrong.
To read a file from within a docker container you have to mount the folder containing the file in the container.

You can workaround this problem by mounting the current folder as a volume like this:
docker run --rm -it -v `pwd`:/tmp freezystem/xidel /tmp/file.html -e "//title"

Here we mount our current working directory to the docker /tmp folder.
Be careful to specify the correct path that leads to the file within the docker container (here it's /tmp/file.html).

You can also use the stdin syntax if you prefer:
cat file.html | docker run --rm -i freezystem/xidel - -e "//title"

You just have to omit the -t (--tty) option to make it work.

[Freezystem]

@esmmusavi feel free to reopen this issue or ask if you have any question.
Hope it solves your problem.