pythonpyspin

spinnaker returned exposure time not liking an arithmetic operation

I am using PySpin / python wrapper for spinnaker (Flir camera SDK).

There is a cam.ExposureTime.GetValue() method to get the current exposure time of the camera. I am able to use it like this:

print("Exposure time set to %.2f µs." % cam.ExposureTime.GetValue())

This works fine and prints the exposure time in micro seconds.

Next, I wanted to display time in milliseconds so I did the following:

print("Exposure time set to %.2f ms." % float(cam.ExposureTime.GetValue())/1000)

Python doesn't like it! I get an error:

TypeError: unsupported operand type(s) for /: 'str' and 'int'

A simple statement like float('12.67')/10 runs without any problem. Not sure what is going wrong.

Solution

  • I figured the issue was due to an arithmetic operation on PySpin returned value inside a print statement. I moved the operation before print statement and that solved by issue.

    I simply used:

    exp_time = float(cam.ExposureTime.GetValue())/1000
print("Exposure time set to %.2f ms." % exp_time )