Chris Withers wrote:
Hi All,
Am I right in thinking this is a bug:
class MyContextManager:
def __enter__(self):
pass
def __exit__(self,t,e,tb):
print type(t),t
print type(e),e
with MyContextManager():
import foo.bar.baz
...when executed, gives me:
<type 'type'> <type 'exceptions.ImportError'>
<type 'str'> No module named foo.bar.baz
Why is 'e' ending up as a string rather than the ImportError object?
This is with Python 2.6.5 if that makes a difference...
I don't have an answer, just some more examples across different
versions/exceptions:
<code>
class MyContextManager:
def __enter__(self):
pass
def __exit__(self,t,e,tb):
print ('--------')
print (type(t),t)
print (type(e),e)
return True
with MyContextManager():
import foo.bar.baz
with MyContextManager():
1/0
with MyContextManager():
not_here()
</code>
<output>
c:\temp>\python25\python test.py
[0]
--------
(<type 'type'>, <type 'exceptions.ImportError'>)
(<type 'str'>, 'No module named bar.baz')
--------
(<type 'type'>, <type 'exceptions.ZeroDivisionError'>)
(<type 'str'>, 'integer division or modulo by zero')
--------
(<type 'type'>, <type 'exceptions.NameError'>)
(<type 'str'>, "name 'not_here' is not defined")
c:\temp>\python26\python test.py
[0]
--------
(<type 'type'>, <type 'exceptions.ImportError'>)
(<type 'str'>, 'No module named bar.baz')
--------
(<type 'type'>, <type 'exceptions.ZeroDivisionError'>)
(<type 'str'>, 'integer division or modulo by zero')
--------
(<type 'type'>, <type 'exceptions.NameError'>)
(<type 'str'>, "name 'not_here' is not defined")
c:\temp>\python27\python test.py
[0]
--------
(<type 'type'>, <type 'exceptions.ImportError'>)
(<type 'exceptions.ImportError'>, ImportError('No module named bar.baz',))
--------
(<type 'type'>, <type 'exceptions.ZeroDivisionError'>)
(<type 'exceptions.ZeroDivisionError'>, ZeroDivisionError('integer
division or modulo by zero',))
--------
(<type 'type'>, <type 'exceptions.NameError'>)
(<type 'exceptions.NameError'>, NameError("name 'not_here' is not
defined",))
c:\temp>\python31\python test.py
--------
<class 'type'> <class 'SyntaxError'>
<class 'SyntaxError'> invalid syntax (foo.py, line 3)
--------
<class 'type'> <class 'ZeroDivisionError'>
<class 'ZeroDivisionError'> int division or modulo by zero
--------
<class 'type'> <class 'NameError'>
<class 'NameError'> name 'not_here' is not defined
</output>
As an aside, does anyone know why the 2.x versions are printing the [0]
as the first line? 3.1 does not.
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