[PYTHON] Differences and commonalities between dict, list, and tuple types

What is dict type, list type, tuple type?

• dict type This type handles dictionaries. Using {}, {key 1: value 1, key 2: value 2, key 3: value 3}

• list type A type that handles a variable array called a list Using [], [value 1, value 2, value 3]

• tuple type A type that handles invariant arrays called tuples Use () and (value 1, value 2, value 3)

Add an element

• dict type

a={"apple":1,"orange":2,"book":3}
a["ball"]=4　#Add an element
print(a)

Execution result

a={"apple":1,"orange":2,"book":3,"ball":4}

• list type Use ʻappend ()`

a=["apple","orange","book"]
a.append("ball")　#Add an element
print(a)　

Execution result

a=["apple","orange","book","ball"]

• tuple type You cannot add elements.

Delete the element

The deletion method is the same for dict type and list type. The tuple type cannot delete an element. The following two are typical ones.

• pop()

dict type

a={"apple":1,"orange":2,"book":3}
a.pop("apple")
print(a)

Execution result

a={"orange":2,"book":3}

list type

a=["apple","orange","book"]
a.pop("0")
print(a)

Execution result

["orange","book"]

• del

dict type

a={"apple":1,"orange":2,"book":3}
del a["apple"]
print(a)

Execution result

{"orange":2,"book":3}

list type

a=["apple","orange","book"]
del a[0]
print(a)

Execution result

["orange","book"]