为什么从 class 调用多个函数只会返回最近调用的 function？

Question

I'm trying to create a class to make viewing my data very quick and simple within Jupyter Notebook.

import color
import h5py

class h5view:
    tempf = h5py.File('juliadata\jul20160102_150km.001.hdf5', 'r')

    def data():
        print(color.YELLOW + 'Data' + color.END)
        templist = []
        for name in h5view.tempf['/Data']:
            templist.append(name)
        return templist
    def metadata():
        print(color.YELLOW + 'Metadata' + color.END)
        templist = []
        for name in h5view.tempf['/Metadata']:
            templist.append(name)
        return templist

This runs without any errors. In the next Jupyter Notebook Cell I type

h5view.data()
h5view.metadata()

outputs

Data
Metadata
['Data Parameters',
 'Experiment Notes',
 'Experiment Parameters',
 'Independent Spatial Parameters',
 '_record_layout']

But before Metadata there should be another returned list. I tried it with other functions in the class (not listed above), and it always gives the return for the most recently called function, but not for any of the others.

If I were to just run h5view.data() Then the output would be

Data
['Array Layout', 'Table Layout']

How do I stop the list here from disappearing the moment I call another function?

I tried assigning the function calls to variables, like so:

a = h5view.data()
b = h5view.metadata()
print(a, b)

which gives a new output:

Data
Metadata
['Array Layout', 'Table Layout'] ['Data Parameters', 'Experiment Notes', 'Experiment Parameters', 'Independent Spatial Parameters', '_record_layout']

Now the list I want is here, but it is after Metadata. What I want is something that looks like this:

Data
['Array Layout',
 'Table Layout']
Metadata
['Data Parameters',
 'Experiment Notes',
 'Experiment Parameters',
 'Independent Spatial Parameters',
 '_record_layout']

Is there an easy way to do this, or perhaps another approach I should be taking?

Answer 1

Python notebooks only print a value if there is no code after it in the cell, which is why h5view.data() is not printing. To get the desired result just use print on each of them separately:

print(h5view.data())
print(h5view.metadata())