Update graph_accelerometer.py

[DrPacemaker]

Usage of undeclared local variable 'header' due to missing indentation

[JamesH1978]

Please review https://github.com/Klipper3d/klipper/blob/master/docs/CONTRIBUTING.md particularly the signed off by line

Thanks
James

[KevinOConnor]

@dmbutyugin - any thoughts on this bug report?

-Kevin

[github-actions]

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[dmbutyugin]

FWIW, the code is somewhat correct. That is, if a user passes a csv file produced by Klipper, it works, there is no mistake there. I suppose the error could arise if the user passes an empty file as an input. A more proper fix would be

 def parse_log(logname, opts):
     with open(logname) as f:
         for header in f:
-            if not header.startswith('#'):
-                break
+            if header.startswith('#'):
+                continue
-        if not header.startswith('freq,psd_x,psd_y,psd_z,psd_xyz'):
+            if not header.startswith('freq,psd_x,psd_y,psd_z,psd_xyz'):
+                break
             # Raw accelerometer data
             return np.loadtxt(logname, comments='#', delimiter=',')
     # Power spectral density data or shaper calibration data
     opts.error("File %s does not contain raw accelerometer data and therefore "
                "is not supported by graph_accelerometer.py script. Please use "
                "calibrate_shaper.py script to process it instead." % (logname,))

[KevinOConnor]

Okay, thanks. Maybe I'm missing something, but the alternative implementation seems to negate the if not header.startswith('freq,psd_x,psd_y,psd_z,psd_xyz') check.

-Kevin

[dmbutyugin]

@KevinOConnor Yes, you are right. So, I sent another PR #6072 with this fix and a few other small improvements.

[github-actions]

This ticket is being closed because the underlying issue is now thought to be resolved.

Best regards,
~ Your friendly GitIssueBot

PS: I'm just an automated script, not a human being.