Python - Exception Handling - Revision history

PeterHarding at 05:01, 31 May 2008

2008-05-31T05:01:29Z

← Older revision		Revision as of 15:01, 31 May 2008
Line 2:		Line 2:

	=Examples=		=Examples=

			<pre>
			try:
			f = open(log_file, 'r')
			except IOError, e:
			sys.stderr.write('open() failed -> %s\n' % e)
			sys.exit(1)
			</pre>

	<pre>		<pre>

2008-05-29T00:00:10Z

← Older revision		Revision as of 10:00, 29 May 2008
Line 50:		Line 50:
	finally:		finally:
	os.chdir(root)		os.chdir(root)
			</pre>

			<pre>
			try:
			# Fork a child process so the parent can exit. This will return control
			# to the command line or shell. This is required so that the new process
			# is guaranteed not to be a process group leader. We have this guarantee
			# because the process GID of the parent is inherited by the child, but
			# the child gets a new PID, making it impossible for its PID to equal its
			# PGID.
			pid = os.fork()
			except OSError, e:
			return((e.errno, e.strerror)) # ERROR (return a tuple)
	</pre>		</pre>


	=Exceptions=		=Exceptions=

2008-05-28T23:58:22Z

← Older revision		Revision as of 09:58, 29 May 2008
Line 44:		Line 44:

	<pre>		<pre>
			try:
			...
			except:
			...
			finally:
			os.chdir(root)

	</pre>		</pre>


	=Exceptions=		=Exceptions=

			Here are some common exception values:


	* AttributeError		* AttributeError
	* IOError		* IOError
			* KeyError
			* KeyboardInterrupt
	* ValueError		* ValueError
	* KeyError


	[[Category:Python]]		[[Category:Python]]

2008-05-28T23:54:45Z

← Older revision		Revision as of 09:54, 29 May 2008
Line 15:		Line 15:
	pf = open(pickle_file, "r")		pf = open(pickle_file, "r")
	except IOError, msg:		except IOError, msg:
	sys.stderr.write('%s~~: cannot~~ open: %s\n' % (pickle_file, msg))		sys.stderr.write('[XXX] %s - Cannot open: %s\n' % (pickle_file, msg))
	details = defaults		details = defaults
	return		return
Line 49:		Line 49:
	=Exceptions=		=Exceptions=

			* AttributeError
	* IOError		* IOError
	* ValueError		* ValueError

2008-05-28T23:52:38Z

@@ Line 1: / Line 1: @@
 =Overview=
 <pre>
@@ Line 10: / Line 11: @@
 </pre>
 [[Category:Python]]

PeterHarding: New page: =Overview=

    try:       out = open(data_file, 'w')    except:        print "XXX"       sys.exit(0)

Category:Python

2008-05-28T23:34:04Z

New page: =Overview= <pre> try: out = open(data_file, 'w') except: print "XXX" sys.exit(0) </pre> Category:Python

New page

=Overview=

<pre>
try:
out = open(data_file, 'w')
except:
print "XXX"
sys.exit(0)
</pre>

[[Category:Python]]