Change value of a variable depending on another in python

Question

So let's say I have two variables, var and text. I would like to know how I could change the value of text depending on what var is equal to.

For example, i receive var and it's value is "this". I would then like text to get the value 1. If var is then equal to "that", text would then be equal to 2.

I would like not to use if ... elif as there could be quite a lot of values.

Sorry for my english, I could try to re-explain if it's not clear

Could your please edit your question and include that illustrates your problem? Please also include the code you have tried. Does it work? — user5547025
– user5547025, Commented May 11, 2016 at 7:36

polku · Accepted Answer · 2016-05-11 07:36:45Z

6

Use a dict :

yourdict = {'this':1, 'that':2, ...}
text = yourdict[var]

answered May 11, 2016 at 7:36

polku

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heemayl · Accepted Answer · 2016-05-11 07:37:55Z

4

Use a dictionary to keep the mappings:

check = { 'this': 1, 'that' : 2 }

Then you can use the value dynamically:

text = check.get(var)

answered May 11, 2016 at 7:37

heemayl

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Comments

cbo · Accepted Answer · 2016-05-11 07:44:34Z

2

Python has no switch/case statement. Best way to go is using a dictionary, which I find more clear even in languages providing a switch statement.

E.g.

cases = {
    'this': 'blah',
    'that': 'blub'
}

var = 'this'
text = cases.get(var, 'your default value here')
print(text)

answered May 11, 2016 at 7:44

cbo

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