Python. How can I remove a specific key in an array?

Question

I have the code:

a = {"listA" : ("keyA", "keyB"), "listB" : ("keyC", "keyD")}

How can I for example remove the KeyB so:

a = {"listA" : ("keyA"), "listB" : ("keyC", "keyD")}

Vasili Syrakis · Accepted Answer · 2015-03-21 12:05:52Z

4

You have a dict not a list with tuples as values, you would need to reassign the value as tuples are immutable so you cannot remove an element:

a = {"listA" : ("keyA", "keyB"), "listB" : ("keyC", "keyD")}

a["listA"] =  a["listA"][0],
print(a)

If you want to be able to modify the values use lists as values which are mutable:

a = {"listA" : ["keyA", "keyB"], "listB" : ["keyC", "keyD"]}

a["listA"].remove("keyB")

print(a)

Vasili Syrakis

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answered Mar 21, 2015 at 11:55

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2 Comments

Thank you, that was quite informing!

@GeorgeTsak, no worries, if you control how the dict is created and want to be able to modify the values easily use a list.