Alex Gusarov wrote:
Hello everybody!
I've a list of dictionaries with 'shorcut' and 'command' keys. When user
types a word program must search this list for a typed shortcut and then
run linked command. What I've wrote:
for cmd in self.commands:
if cmd['shortcut'] == input:
os.popen(cmd['command'])
break
else:
os.popen(input)
But it's a brute-force method and I think there is another way in
searching items through a list by dictionary key. Please give me advice
how can I implement fast search in list of dictionaries by some
dictionary key. In my mind language:
list.get({'shortcut' == input})
If want to go from the shortcut to the command (cmd['shortcut'] ->
cmd['command']) the quickest way is using a dict, where cmd['shortcut']
is the key and cmd['command'] is the value:
self.command_dict = {}
for cmd in self.commands:
self.command_dict[cmd['shortcut']] = cmd['command']
and then:
os.popen(self.command_dict[input])
This will raise a KeyError if it's unknown. The equivalent of your code
above is:
os.popen(self.command_dict.get(input, input))
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