# Trying to run Jupyter Notebook with Python 3 but getting kernel error

**URL:** <https://discourse.jupyter.org/t/trying-to-run-jupyter-notebook-with-python-3-but-getting-kernel-error/4462>\
**Category:** Notebook\
**Created:** [May 19, 2020, 7:53pm UTC](https://discourse.jupyter.org/t/trying-to-run-jupyter-notebook-with-python-3-but-getting-kernel-error/4462 "2020-05-19T19:53:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tb14223](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/tb14223/32/2094_2.png) [@tb14223](https://discourse.jupyter.org/u/tb14223)\
**Post date:** [May 19, 2020, 7:53pm UTC](https://discourse.jupyter.org/t/trying-to-run-jupyter-notebook-with-python-3-but-getting-kernel-error/4462/1 "2020-05-19T19:53:42Z")

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![Screen Shot 2020-05-19 at 2.50.07 PM](https://canada1.discourse-cdn.com/flex031/uploads/jupyter/original/2X/8/8967d1b8771befb0bf5217f36c2ad8774cfb4e8a.png)

^ what my notebook interface looks like

What the kernel error reads:  
Traceback (most recent call last):  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/tornado/web.py”, line 1703, in \_execute  
result = await result  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py”, line 742, in run  
yielded = self.gen.throw(\*exc\_info) # type: ignore  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/notebook/services/sessions/handlers.py”, line 72, in post  
type=mtype))  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py”, line 735, in run  
value = future.result()  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py”, line 742, in run  
yielded = self.gen.throw(\*exc\_info) # type: ignore  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/notebook/services/sessions/sessionmanager.py”, line 88, in create\_session  
kernel\_id = yield self.start\_kernel\_for\_session(session\_id, path, name, type, kernel\_name)  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py”, line 735, in run  
value = future.result()  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py”, line 742, in run  
yielded = self.gen.throw(\*exc\_info) # type: ignore  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/notebook/services/sessions/sessionmanager.py”, line 101, in start\_kernel\_for\_session  
self.kernel\_manager.start\_kernel(path=kernel\_path, kernel\_name=kernel\_name)  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py”, line 735, in run  
value = future.result()  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/tornado/gen.py”, line 209, in wrapper  
yielded = next(result)  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/notebook/services/kernels/kernelmanager.py”, line 168, in start\_kernel  
super(MappingKernelManager, self).start\_kernel(\*\*kwargs)  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/jupyter\_client/multikernelmanager.py”, line 158, in start\_kernel  
km.start\_kernel(\*\*kwargs)  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/jupyter\_client/manager.py”, line 305, in start\_kernel  
self.kernel = self.\_launch\_kernel(kernel\_cmd, \*\*kw)  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/jupyter\_client/manager.py”, line 212, in \_launch\_kernel  
return launch\_kernel(kernel\_cmd, \*\*kw)  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/site-packages/jupyter\_client/launcher.py”, line 135, in launch\_kernel  
proc = Popen(cmd, \*\*kwargs) File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/subprocess.py”, line 800, in **init**  
restore\_signals, start\_new\_session)  
File “/Users/Brahmbha/opt/anaconda3/lib/python3.7/subprocess.py”, line 1551, in \_execute\_child  
raise child\_exception\_type(errno\_num, err\_msg, err\_filename)  
FileNotFoundError: [Errno 2] No such file or directory: ‘/Users/Brahmbha/anaconda2/envs/ipykernel\_py3/bin/python’: ‘/Users/Brahmbha/anaconda2/envs/ipykernel\_py3/bin/python’

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**Author:** ![1kastner](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/1kastner/32/1537_2.png) [@1kastner](https://discourse.jupyter.org/u/1kastner)\
**Post date:** [May 20, 2020, 9:28am UTC](https://discourse.jupyter.org/t/trying-to-run-jupyter-notebook-with-python-3-but-getting-kernel-error/4462/2 "2020-05-20T09:28:15Z")

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How did you install this? `anaconda2` indicates that Python 2 is installed and `anaconda3` indicates that Python 3 is installed as well. Since both of them show up together here, maybe something is mixed up? If you don’t need Python 2 and the corresponding Anaconda version, I suggest you to remove it.