How to determine size (in bytes) of a PyTables array?

Question

How can I determine the size (in bytes) of a PyTables Array?

Answer 1

It turns out that since all PyTables arrays are simply Numpy arrays underneath, you can do the following:

MyPytableFile.root.myPytableArray[:].nbytes

Answer 2

Its not straight forward to do, but one thing you can do is to pickle the object and then determine the size of the serialized object. See this post

Answer 3

Why not

arrSizeInBytes = arr.nrows * arr.rowsize

At least it equals to the results of

./h5ls -r -v pytables.db | grep "Dataset\|Storage"