Preserve output from python print

In reticulate: Interface to 'Python'

bt <- reticulate::import_builtins()
bt$print("Hello world")

Print statements should always be captured

In jupyter_compat = FALSE: we should only see the output of both expressions.

print(1)
print(2)

In jupyter_compat = TRUE: we should only see the output of both expressions.

```{python, jupyter_compat = TRUE} print(1) print(2)

## Only outputs of last expressions are captured in jupyter compat

In `jupyter_compat = FALSE`: we should only see the output of both expressions.

```{python}
1 + 0
1 + 1

jupyter_compat = TRUE: we should only see the output of the last expression.

```{python, jupyter_compat = TRUE} 1 + 0 1 + 1

## One can disable outputs by using `;`

In `jupyter_compat = FALSE`: we should only see the print statement output

```{python}
print("hello");
1 + 0;
1 + 1;

jupyter_compat = TRUE: we should only see the print statement output

```{python, jupyter_compat = TRUE} print("hello"); 1 + 0; 1 + 1;

## `jupyter_compat` works with interleaved expressions

```{python, jupyter_compat=TRUE}
print('first_stdout')
'first_expression'
print('second_stdout')
'final_expression'

reticulate documentation built on Aug. 8, 2025, 6:31 p.m.