[Python] How do I call a class method from another file in Python?

I'm learning Python and have two files in the same directory.

printer.py

class Printer(object):
def __init__(self):
self.message = 'yo'

def printMessage(self):
print self.message

if __name__ == "__main__":
printer = Printer()
printer.printMessage()


How do I call the printMessage(self) method from another file, example.py in the same directory? I thought this answer was close, but it shows how to call a class method from another class within the same file.

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