create_sphere() probelm

[Forrestwang1]

Hi all, I tried to use this function to make a mask, my understanding is I can put a list of centers but I got some error. The below is example code, when running the code, I got the error. 'AttributeError: '_io.BytesIO' object has no attribute 'mode' any suggestion? Thanks~

`from nltools.mask import create_sphere

mask = create_sphere([[-36,-56,-18],[0,0,0]], radius=3)`

[ljchang]

Hi @Forrestwang1, sorry I missed this. Can you share what version of nltools you are using? and the type of computer you are using? Your code works on my mac running nltools 0.4.2.

[ejolly]

Related to #365