No argument tooltip for some functions?

In Spyder, if I import numpy as np, then start typing:


I get a tooltip that tells me the arguments:



In PyCharm, I get nothing.


I have tried with a few other functions, and the behaviour seems quite inconsistent. Any ideas why? Can this be fixed? Thanks!





You should get the tooltip as shown on the screenshot below (also notice the helpful documentation on the right):


The tooltip is triggered by opening brackets () . Which PyCharm version are you using? 


I don't. That's odd. I get it for many other functions , including other numpy functions, but not arange.


Which numpy version are you using? In my case I'm using PyCharm 2018.3.5 and numpy==1.16.2 , do you have the issue with the same versions?


Numpy 1.16.2

PyCharm 2018.3.5 (Professional Edition)
Build #PY-183.5912.18, built on 
Licensed to 
You have a perpetual fallback license for this version
JRE: 1.8.0_152-release-1343-b28 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0


Hi John,

Strange, same versions as me. Let's try the following:

1. Try File > Invalidate caches / restart , that helps if there was an issue with caching / building skeletons

2. Type `np.arange()`, place caret inside the brackets, and press CTRL+P, that should force the tip to appear in case it's an interface related issue.

3. Hit CTRL+CLICK on "arange", that should take you to it's declaration, which should look something like this:

def arange(start=None, *args, **kwargs):

Do you have the same in your case?


No, it still doesn't work.

If I CTRL + click on arange, I am taken to, which does NOT contain def arange(....):

Maybe that's the issue?

Similarly, the documentation pane on the right shows numpy.core.multiarray , not arange.

I have done:

conda remove --force numpy 

to remove numpy only, no ther packages. Then

conda install numpy

to reinstall it.

I have rebooted the PC, and done File -> invalidate caches / restart from PyCharm. Still nothing


>If I CTRL + click on arange, I am taken to, which does NOT contain def arange(....):

Yes, most likely that is the issue. Frankly, this method should not even work if PyCharm can't even find the declaration. Have you tried making a simple script with arange and running it? Also, try it from your system terminal using the same interpreter to confirm/exclude PyCharm from the suspect list.

Please also try to create a new environment and install numpy there. If still reproduced in new conda environment, try new virtualenv, as the issue might be conda-related.


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