When you need get a value from dicctionary is very easy, anybody know how do it, but i believe this solution is unknow from a new programer of python.
the most common way to get a value from dictionary:
computer_component = {"output":"monitor","input":"teclado","storage":"SSD"} get_component = computer_component['output'] print(get_component) the problem with that is when value not exists in dictionary:
computer_component = {"output":"monitor","input":"teclado","storage":"SSD"} get_component = computer_component['internet'] print(get_component) #output: #Traceback (most recent call last): # File "main.py", line 2, in <module> # get_component = computer_component['internet'] #KeyError: 'internet' Ok, you can validate if value exists:
computer_component = {"output":"monitor","input":"teclado","storage":"SSD"} if "internet" in computer_component.keys(): print(computer_component["internet"]) else: print("internet 404") #output: #internet 404 but the best way to get value from a dictionary is this:
computer_component = {"output":"monitor","input":"teclado","storage":"SSD"} print(computer_component.get("output","404")) #output #monitor #--in case when value not exists: print(computer_component.get("internet","404")) #output #404 where the firt param is the value and the second is the value by default.
Forgive me, but my English is a little bad, I want to improve it.
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