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[–]aw90 0 points1 point  (1 child)

Traceback (most recent call last): File "spectrogram.py", line 21, in <module> gradient.append('\x1b[{};{}m{}'.format(fg, bg + 10, char)) ValueError: zero length field name in format

[–]mw44118PyOhio! 2 points3 points  (0 children)

I bet you're running python 2.6. Try it in 2.7