TypeError: 'unicode' objet n'est pas appelable

Je veux obtenir le code source, mais j'ai l' ERROR:

>> from selenium import webdriver
>> driver = webdriver.PhantomJS()
>> url='http://google.com'
>> cont=driver.page_source(url)
>> print cont
>> driver.quit()

ERREUR:

Traceback (most recent call last):
  File "u.py", line 6, in <module>
    cont=driver.page_source(url)
TypeError: 'unicode' object is not callable
InformationsquelleAutor MLSC | 2014-11-05