CODEWITHSUNDEEP
pythonfunctionvariablesinitialization
Li Cooper
Li Cooper

Reputation: 71

initializing variable while defining function in python?

Learning Python, trying to read NASA program. Why is it show=True while defining function? Are we allowed to initialize variable this way? I don' see any use of it.

def visualizeDomain(domain, show=True):
    '''Draw all the sensors and ground truth from a domain'''
    centerMap(domain.center[0], domain.center[1], 11)
    for s in domain.sensor_list:
        apply(addToMap, s.visualize(show=show))
    if domain.ground_truth != None:
        addToMap(domain.ground_truth, {}, 'Ground Truth', False)

Thank you everyone for your help.

Upvotes: 1

Views: 4782

Answers (2)

Chris Nguyen
Chris Nguyen

Reputation: 160

So yeah, all the answers are right. Basically you can call that function with just one argument... "Show" will just be True.

Upvotes: 0

jgray
jgray

Reputation: 76

This is Python's syntax for default arguments. If no value is passed for the second argument to visualizeDomain(), it will automatically be assigned a value of True. (See https://docs.python.org/2/tutorial/controlflow.html#default-argument-values)

Upvotes: 5

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