Sending code to an interactive Python session is tricky business due to
Python's indentation-sensitive nature. Perfectly valid code which executes when
run from a file may fail with a SyntaxError when pasted into the CPython
interpreter.
IPython has a %cpaste "magic function" that allows for
error-free pasting. In order for vim-slime to make use of this feature for
Python buffers, you need to set the corresponding variable in your .vimrc:
let g:slime_python_ipython = 1Note: if you're using IPython 5, you need to set g:slime_python_ipython for
pasting to work correctly.
If your target supports bracketed-paste, that's
a better option than g:slime_python_ipython:
" in .vimrc
let g:slime_bracketed_paste = 1
" or, in ftplugin/python.vim
let b:slime_bracketed_paste = 1This lets your target deal with all the problems with indentation and avoids depending %cpaste,
which occassionally causes issues (e.g., #327)