CHEAT SHEET 3

Sometimes you might need to convert between different data types in Python for one reason or another. That is very easy to do:

From tuple to list:

>>> data = (1, 2, 3)

>>> list(data)

[1, 2, 3]

From list to tuple:

>>> data = [1, 2, 3]

>>> tuple(data)

(1, 2, 3)

From list to dictionary:

>>> data = [["name", "John"], ["surname", "smith"]]

>>> dict(data)

{'name': 'John', 'surname': 'smith'}

Note that the original data type needs to have the data structured in a way that can be understood by the new data type. For example, the following would not work:

>>> data = [1, 2, 3]

>>> dict(data)

TypeError: cannot convert dictionary update sequence element #0 to a sequence

That's because a dictionary is made of key and value pairs, but the list was not constructed that way, so the above would generate an error.

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