I see Bob Gailer has responded to your message while I was still trying to make sense of it. His "guesses" are probably right on.

I have no knowledge of arcpy, so I can't directly answer your query. But I may be able to help you formulate a question that will solicit some answers.


On 03/03/2012 11:21 PM, Carie Pigeon wrote:
I have an assignment to create a polyline feature class of rhino tracks from a csv file. I am getting an error that says "unbound method add() must be called with Array instance as first argument (got type instance)". this is for line 104, the line I underlined and put in bold below in my code. What does this mean? If there are other obvious code issues, please feel free to comment. I am unsure if my code is correct. Thank you for your time!
Cheers,
Carie
<SNIP>
        coordArray.add(coord)

There's no underline or bold here; this mailing list is a text based one, and attributes are dropped for most of us. If you want to tag a particular line, use a comment in the code, or put a row of dashes after it, or something.

If you import a non-standard library, then give a web link so that interested people could actually look it up. In addition, tell the version that you're using.

Similarly, you need to supply the python version, and probably the OS environment Windows 94, Atari 4.3, ...)

When giving error messages, supply the whole stacktrace, not just the abbreviated error. The stacktrace would have shown the line that actually triggered the error. And in more complex code, it also would have shown the functions that called the one that had the error.

As you surmise, there seem to be a number of problems with the code. But judicious use of print statements could have probably given you a lot of clues as to what was wrong.



--

DaveA

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