023-engine-python.md

R works, of course.

library(knitr)
set.seed(123)
rnorm(5)

## [1] -0.56048 -0.23018  1.55871  0.07051  0.12929

Does knitr work with Python? Use the chunk option engine='python':

x = 'hello, python world!'
print(x)
print(x.split(' '))

## hello, python world!
## ['hello,', 'python', 'world!']

Or use the syntax ```{python}:

x = 'hello, python world!'
print(x.split(' '))

## ['hello,', 'python', 'world!']

If all the chunks below are python chunks, we can set the engine globally:

Chunk Options

You can use some chunk options like eval, echo and results. For example, eval=FALSE (do not evaluate code):

x = 'hello, python world!'
print(x)
print(x.split(' '))

or echo=FALSE (hide source code):

## hello, python world!
## ['hello,', 'python', 'world!']

or results='hide':

x = 'hello, python world!'
print(x)
print(x.split(' '))

or results='asis':

print '**Write** _something_ in `Markdown` from `Python`!'

Write something in Markdown from Python!

You can also cache the computation:

import time
# pretend this is a time-consuming task...
time.sleep(10)
print(1+1)

## 2

Strict Markdown

You can use strict markdown (i.e. indent by 4 spaces) by setting render_markdown(TRUE).

render_markdown(TRUE)

Now see how the output is changed:

x = 'hello, python world!'
print(x)
print(x.split(' '))

## hello, python world!
## ['hello,', 'python', 'world!']