Not sure if this is related, but one thing that goes wrong with
the upgrade to IPython 5.0 is that multiline output gets an
extraneous blank line, for example instead of
sage: identity_matrix(2)
[1 0]
[0 1]
we get
sage: identity_matrix(2)
[1 0]
[0 1]
This is solved in IPython 5.3 but Sage has not upgraded to
that version yet. You can fix this on your installation by editing
the "prompts.py" file located at (from your SAGE_ROOT):
local/lib/python/site-packages/IPython/terminal/prompts.py
and replacing the definition of the RichPromptDisplayHook class
by the version at
https://github.com/takluyver/ipython/blob/83d273e24b28b9c06f0fa4f5bf90581db7c29be8/IPython/terminal/prompts.py
ie
#####
class RichPromptDisplayHook(DisplayHook):
"""Subclass of base display hook using coloured prompt"""
def write_output_prompt(self):
sys.stdout.write(self.shell.separate_out)
# If we're not displaying a prompt, it effectively ends with a
newline,
# because the output will be left-aligned.
self.prompt_end_newline = True
if self.do_full_cache:
tokens = self.shell.prompts.out_prompt_tokens()
prompt_txt = ''.join(s for t, s in tokens)
if prompt_txt and not prompt_txt.endswith('\n'):
# Ask for a newline before multiline output
self.prompt_end_newline = False
if self.shell.pt_cli:
self.shell.pt_cli.print_tokens(tokens)
else:
sys.stdout.write(prompt_txt)
#####
In case this extra blank line is interpreted somehow
as something returning None, this might explain why
you get the error message you quote:
TypeError: 'NoneType' object is not iterable
Just a wild guess, maybe worth a try...
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