Find an imported python functions syntax

Question

I am trying to understand a python class and its use. Here is an example of its use on Linux:

from Lima import Andor
from lima import Core

cam = Andor.Camera("/usr/local/etc/andor", 0)

Here is the source of the package: https://github.com/esrf-bliss/Lima-camera-andor. I have installed this package on windows, however there is no documentation for its use or syntax. I would like to know what I should use instead of "/usr/local/etc/andor" for my system. Is there any way to look at the source code for this Andor class?

EDIT:

actually running the example code above returns:

runfile('C:/Users/BioPhotonics/.spyder-py3/untitled0.py', wdir='C:/Users/BioPhotonics/.spyder-py3') `Traceback (most recent call last):

File "C:\Users\BioPhotonics\.spyder-py3\untitled0.py", line 14, in ` cam = Andor.Camera("/usr/local/etc/andor", 0)

Exception: Hardware: lima::Andor::Camera::Camera(C:\miniconda3\conda-bld\lima-camera-andor_1568271992368\work\src\AndorCamera.cpp, 120): `InvalidValue: Invalid Camera number

InvalidValue: Invalid Camera number - Did you check this ? — Ram
– Ram, Commented Jun 16, 2021 at 15:53
I have tried help(andor) to no avail. The invalid camera number error is probably due to the path I'm passing, as this is definitely wrong. I thought I would be able to "see" what Andor.Camera() requires as arguments? but maybe that's not possible — Ryan_Maschine
– Ryan_Maschine, Commented Jun 16, 2021 at 15:57

chepner · Accepted Answer · 2021-06-16 15:37:14Z

3

Andor.__file__ will tell you the file used to define the module Andor. (Or, if Andor is not itself a module, you can import Lima and check Lima.__file__.)

answered Jun 16, 2021 at 15:37

chepner

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Ryan_Maschine Over a year ago

Thank ou, however all that is there is an init file for the Andoe class which states from Lima import Core from limaandor import Andor as A globals().update(_A.__dict_)

user2313067 · Accepted Answer · 2021-06-16 16:54:48Z

1

The source for the Andor.Camera class is in the src/AndorCamera.cpp file. The parameter you're having problem with is a config directory, which is passed to the Initialize function of the Andor C SDK.

On Oxford instruments, there appear to be two versions of this SDK, but only version 2 has this function, so I suppose that's the one the library's using. You can download the documentation for the SDK here. Page 211 documents the Initialize function, which expects a config directory containing at least Detector.ini. I don't know where (or even if) that directory is created when installing the Andor driver pack on Windows.

answered Jun 16, 2021 at 16:54

user2313067

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Ryan_Maschine Over a year ago

Thanks, this is exactly what I wanted.

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