%load_ext importnb fails if ipython is EggInfoDistribution rather than DistInfoDistribution

[waynebliu]

%load_ext importnb

ImportError Traceback (most recent call last)
in
----> 1 get_ipython().run_line_magic('load_ext', 'importnb')

/tmp/artfs-fuse-mount-7G7IIgcG/523966b89c949a780a9134439028df4a494dbca6_20191116_125724_031/glibc-2.13-x86_64/ext/public/python/ipython/7/5/0/dist/lib/python3.6/IPython/core/interactiveshell.py in run_line_magic(self, magic_name, line, _stack_depth)
2305 kwargs['local_ns'] = sys._getframe(stack_depth).f_locals
2306 with self.builtin_trap:
-> 2307 result = fn(*args, **kwargs)
2308 return result
2309

in load_ext(self, module_str)

/tmp/artfs-fuse-mount-7G7IIgcG/523966b89c949a780a9134439028df4a494dbca6_20191116_125724_031/glibc-2.13-x86_64/ext/public/python/ipython/7/5/0/dist/lib/python3.6/IPython/core/magic.py in (f, *a, **k)
185 # but it's overkill for just that one bit of state.
186 def magic_deco(arg):
--> 187 call = lambda f, *a, **k: f(*a, **k)
188
189 if callable(arg):

/tmp/artfs-fuse-mount-7G7IIgcG/523966b89c949a780a9134439028df4a494dbca6_20191116_125724_031/glibc-2.13-x86_64/ext/public/python/ipython/7/5/0/dist/lib/python3.6/IPython/core/magics/extension.py in load_ext(self, module_str)
31 if not module_str:
32 raise UsageError('Missing module name.')
---> 33 res = self.shell.extension_manager.load_extension(module_str)
34
35 if res == 'already loaded':

/tmp/artfs-fuse-mount-7G7IIgcG/523966b89c949a780a9134439028df4a494dbca6_20191116_125724_031/glibc-2.13-x86_64/ext/public/python/ipython/7/5/0/dist/lib/python3.6/IPython/core/extensions.py in load_extension(self, module_str)
85 dir=compress_user(self.ipython_extension_dir)))
86 mod = sys.modules[module_str]
---> 87 if self._call_load_ipython_extension(mod):
88 self.loaded.add(module_str)
89 else:

/tmp/artfs-fuse-mount-7G7IIgcG/523966b89c949a780a9134439028df4a494dbca6_20191116_125724_031/glibc-2.13-x86_64/ext/public/python/ipython/7/5/0/dist/lib/python3.6/IPython/core/extensions.py in _call_load_ipython_extension(self, mod)
132 def _call_load_ipython_extension(self, mod):
133 if hasattr(mod, 'load_ipython_extension'):
--> 134 mod.load_ipython_extension(self.shell)
135 return True
136

/tmp/artfs-fuse-mount-7G7IIgcG/523966b89c949a780a9134439028df4a494dbca6_20191116_125724_031/glibc-2.13-x86_64/ext/public/python/importnb/0/5/5/dist/lib/python3.6/importnb/ipython_extension.py in load_ipython_extension(ip)
96 def load_ipython_extension(ip=None):
97 global manager, module
---> 98 if IPYTHON_MAIN():
99 from .parameterize import Parameterize as Notebook
100 else:

/tmp/artfs-fuse-mount-7G7IIgcG/523966b89c949a780a9134439028df4a494dbca6_20191116_125724_031/glibc-2.13-x86_64/ext/public/python/importnb/0/5/5/dist/lib/python3.6/importnb/ipython_extension.py in IPYTHON_MAIN()
90 return (
91 getattr(runner_frame, "function", None)
---> 92 == pkg_resources.load_entry_point("ipython", "console_scripts", "ipython").name
93 )
94

/nas/local/simscripts/wayne/.nest/qcnest2/lib/python3.6/site-packages/pkg_resources/init.py in load_entry_point(dist, group, name)
478 def load_entry_point(dist, group, name):
479 """Return name entry point of group for dist or raise ImportError"""
--> 480 return get_distribution(dist).load_entry_point(group, name)
481
482

/nas/local/simscripts/wayne/.nest/qcnest2/lib/python3.6/site-packages/pkg_resources/init.py in load_entry_point(self, group, name)
2688 ep = self.get_entry_info(group, name)
2689 if ep is None:
-> 2690 raise ImportError("Entry point %r not found" % ((group, name),))
2691 return ep.load()
2692

ImportError: Entry point ('console_scripts', 'ipython') not found

import pkg_resources
type(pkg_resources.get_distribution('ipython'))

pkg_resources.EggInfoDistribution

[waynebliu]

I think a simple solution is to wrap try/except around the if IPYTHON_MAIN() line

[waynebliu]

Would be nice to have this in 0.5.6 if possible...

[tonyfast]

I'm sorry I delayed answering this.

Could you post a line of code/pr that shows the fix you used?

[waynebliu]

Ugly workaround: I create my wrapper extension and just catch the exception

def load_ipython_extension(ip=None):
import importnb, importnb.ipython_extension
try:
if importnb.ipython_extension.IPYTHON_MAIN():
from importnb.parameterize import Parameterize as Notebook
else:
from importnb.loader import Notebook
except:
from importnb.loader import Notebook
... # rest is same