A Jupyter Kernel for the Rust programming language.
sh
sudo apt install libzmq3-dev jupyter-notebook
cargo install evcxr_jupyter
evcxr_jupyter --install
install jupyter or jupyterlab (eg. via anaconda)
sh
brew install zeromq pkg-config
cargo install evcxr_jupyter
evcxr_jupyter --install
sh
cargo install evcxr_jupyter
evcxr_jupyter --install
The last expression in a cell gets printed. By default, we'll use the debug
formatter to emit plain text. If you'd like, you can provide a function to show
your type (or someone else's type) as HTML (or an image). To do this, the type
needs to implement a method called evcxr_display which should then print
one or more mime-typed blocks to stdout. Each block starts with a line
containing BEGIN_EVCXR_OUTPUT followed by the mime type, then a newline, the
content then ends with a line containing EVCXR_END_CONTENT.
For example, the following shows how you might provide a custom display function for a type Matrix. You can copy this code into a Jupyter notebook cell to try it out.
rust
use std::fmt::Debug;
pub struct Matrix<T> {pub values: Vec<T>, pub row_size: usize}
impl<T: Debug> Matrix<T> {
pub fn evcxr_display(&self) {
let mut html = String::new();
html.push_str("<table>");
for r in 0..(self.values.len() / self.row_size) {
html.push_str("<tr>");
for c in 0..self.row_size {
html.push_str("<td>");
html.push_str(&format!("{:?}", self.values[r * self.row_size + c]));
html.push_str("</td>");
}
html.push_str("</tr>");
}
html.push_str("</table>");
println!("EVCXR_BEGIN_CONTENT text/html\n{}\nEVCXR_END_CONTENT", html);
}
}
let m = Matrix {values: vec![1,2,3,4,5,6,7,8,9], row_size: 3};
m
It's probably a good idea to either print the whole block at once, or to lock stdout then print the block. This should ensure that nothing else prints to stdout at the same time (at least no other Rust code).
If the content is binary (e.g. mime type "image/png") then it should be base64 encoded.
If you always want particular options set, you can add these to init.evcxr which, if present will be run on startup. Sample locations: * Linux: ~/.config/evcxr/init.evcxr * Mac: /Users/Alice/Library/Preferences/evcxr/init.evcxr * Windows: C:\Users\Alice\AppData\Roaming\evcxr\init.evcxr
For example, if you want to always turn on optimization (will make stuff slower
to compile), you might put the following in init.evcxr:
:opt 2
sh
evcxr_jupyter --uninstall
cargo uninstall evcxr_jupyter