Completely disable IPython output caching

Question

I\'m dealing with some GB-sized numpy arrays in IPython. When I delete them, I definitely want them gone, in order to recover the memory. IPythons output cache is quite annoying

Answer 1

Create an ipython profile:

!ipython profile create

The output might be (for ipython v4.0):

[ProfileCreate] Generating default config file: '/root/.ipython/profile_default/ipython_config.py'
[ProfileCreate] Generating default config file: '/root/.ipython/profile_default/ipython_kernel_config.py'

Then add the line 'c.InteractiveShell.cache_size = 0' to the ipython_kernel_config.py file by

!echo 'c.InteractiveShell.cache_size = 0' >> /root/.ipython/profile_default/ipython_kernel_config.py

Load another ipython kernel and check if this work

In [1]: 123
Out[1]: 123

In [2]: _1
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
 in ()
----> 1 _1

NameError: name '_1' is not defined

In [3]: len(Out)
Out[3]: 0