python 3.x - How to change global variable through function? -

is there way change global variable within function in python without passing in parameter?

test = 5 print(test) def changetest():     test = 10     return  #no effect.  test still equals 5 print(test) 

you need specify want use global version of 'test' rather local one

test = 5  print(test)  def changetest():     global test //added line     test = 10     return  changetest()  print(test) //prints 10