More Python YASnippets

I found that snippets were missing for try- and with-statements as well, so I created some:

# contributor: Mads D. Kristensen 
# name: try
# --
try:
    $0
except ${1:Exception}, ${2:e}:
    pass

# contributor: Mads D. Kristensen 
# name: with
# --
with ${1:lock}:
     $0

These are very simple snippets but I find them immensely useful and I hope you will too :-)