On 2012-10-15 17:00, Wanderer wrote:
How do you get Exceptions to print messages? I have an exception defined like
this
class PvCamError(Exception):
def __init__(self, msg):
self.msg = msg
But when the error is raised I get this:
Traceback (most recent call last):
File
"C:\Python27\lib\site-packages\ipython-0.12.1-py2.7.egg\IPython\core\interactiveshell.py",
line 2538, in run_code
exec code_obj in self.user_global_ns, self.user_ns
File "<ipython-input-1-fb48da797583>", line 1, in <module>
import S477Test
File "U:\workspace\camera\src\S477Test.py", line 13, in <module>
camera.getSerialNum()
File "U:\workspace\camera\src\S477.py", line 131, in getSerialNum
num = self.pl.getParamValue(pvcamConstants.PARAM_HEAD_SER_NUM_ALPHA)
File "U:\workspace\camera\src\pvcam.py", line 261, in getParamValue
raise PvCamError("Unhandled Type: {0}".format(attype))
PvCamError
Why wasn't the message printed out?
You didn't add a __str__ method:
class PvCamError(Exception):
def __init__(self, msg):
self.msg = msg
def __str__(self):
return self.msg
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