TypeError at use of make_spectrogram

[filipthor]

As the title reads, I have hit a bit of a snub trying the code out.

Trying to run the code:
import thinkdsp

wave = thinkdsp.read_wave('100475__iluppai__saxophone-weep.wav')
spectrogram = wave.make_spectrogram(seg_length=512)
spectrogram.plot(high=700)

on Python 3.6, resulting in:
Traceback (most recent call last):
...
File "/Users/filipthor/PycharmProjects/music/main.py", line 9, in
spectrogram = wave.make_spectrogram(seg_length=512)
File "/Users/filipthor/anaconda/lib/python3.6/site-packages/thinkdsp.py", line 943, in make_spectrogram
segment = self.slice(i, j)
File "/Users/filipthor/anaconda/lib/python3.6/site-packages/thinkdsp.py", line 897, in slice
ys = self.ys[i:j].copy()
TypeError: slice indices must be integers or None or have an index method

Any ideas?

[filipthor]

"ugly-fixed" it by wrapping i and j with int(), which seems to work

[AllenDowney]

In the current version,

        step = int(seg_length // 2)

so i and j should already be ints.

Maybe you have an older version of thinkdsp.py?

[AllenDowney]

I just ran a test with current version and all is well.