AttributeError in custom command

[brush701]

I'm trying to add a custom command that computes the frequency of numerical columns. I've got it mostly working, except that every time I invoke it I get a status warning: AttributeError: 'int' object has no attribute 'name'. Other than that the command executes correctly, including setting the column name. Any suggestions on where I can fix this error.

Sheet.addCommand('z.', 'addcol-freq', 'addColumn(FrequencyColumn(cursorCol), cursorColIndex+1)')

def FrequencyColumn(sourceCol):
    return Column(sourceCol.name+"_frequency",
                    getter=lambda c,r: c.source.getTypedValue(r)/c.total,
                    source=sourceCol,
                    total=sum(sourceCol.getValues(sourceCol.sheet.rows)))

[midichef]

Every argument to addColumn() except the named argument index is treated like a list of columns because of *cols:

visidata/visidata/sheets.py

Line 520 in 8f823f5

def addColumn(self, *cols, index=None):

The solution is to use index= in front of your column index:

Sheet.addCommand('z.', 'addcol-freq', 'addColumn(FrequencyColumn(cursorCol), index=cursorColIndex+1)')

Also, a feature that may help you as you write code for visidata: to examine a traceback for errors like this, run the command error-recent (with the shortcut Ctrl+E). Or if you have more than one error, errors-all.

In this example, the traceback would offer this clue on where to look or add debug statements:

  File "/home/midichef/.local/lib/python3.10/site-packages/visidata/sheets.py", line 535, in addColumn
    col.name = self.maybeClean(col.name)
AttributeError: 'int' object has no attribute 'name'

[brush701]

Thanks, this was it exactly!