Note the usage of function default values in python.

Note the usage of function default values in python.

When the default value is defined in the function, the value Initialization is performed only once, that is, when def methodname is executed. See the following code:

From datetime import datetime def test (t = datetime. today (): print t if _ name _ = "_ main _": test ()

The output time of the two method calls is the same value, rather than the current execution time. In this case, we recommend that you use the following method:

From datetime import datetime def test2 (t = None): if t is None: t = datetime. today () print t if _ name _ = "_ main _": test ()

The usage of the default function values in the above python is explained in detail by the small editor. I hope to give you a reference, and I hope you can provide more support for the customer's house.