Ternary operator in Python

The ternary operator is an in-line if/else statement that many languages support natively; however, Python does not have a specific operator. Instead, it uses conditional expression resolution which was added in Python 2.5.

In-line if/else statement

An in-line if/else statement in Python looks like the following:

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'true' if True else 'false'

Output:

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'true'

Breaking down the syntax,

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true_value if condition else false_value

Return the value of the “idle” stage for a blue/green deployment.

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def get_active_stage():
    # logic to get the active stage
    return "blue"

idle_stage = "green" if get_active_stage() == "blue" else "blue"
print(stage)

Output:

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green