VIM get E488: Trailing characters error

Question

I'd like to implement a function that can get VirtualEnv name from a file named .env and then execute CondaChangeEnv VirtualEnvName.

function! SetVirtualEnv()
    let cmd = "sed -n '1,1p' ". $PWD . "/.env"
    let result = 'CondaChangeEnv ' . system(cmd)
    if !v:shell_error
        exe result
    endif
endfunction
autocmd FileType python call SetVirtualEnv()

But, it seems like something is wrong

E488: Trailing characters: CondaChangeEnv G

G is the content of .env and generated by echo -n 'G' >> .env

So, anybody can help me? Thanks in advance :)

Answer 1

If you check the source codes of your plugin:

command! CondaChangeEnv call s:CondaChangeEnv()

The CondaChangeEnv command expects no parameter, but you passed a G to it. That's the cause of your problem.