Processing.py - Unknown Error on Class Definition

问题

I have no idea how to fix this error.

Maybe there's an open parenthesis or quotation mark somewhere before this line?

What is wrong with this code?

Class Ribbon: # I got an error on this line!
def __init__(self, xpos, ypos, m, g):
    self.x=xpos
    self.y=ypos
    self.mass=m
    self.gravity=g
    ..

def update(self, xpos, ypos):
    ..

def display(self, xpos, ypos):
    ..

回答1:

Here is your problem:

Class Ribbon (object): 
      def __init__(self, xpos, ypos, m, g):
      self.x=xpos
      self.y=ypos
      self.mass=m
      self.gravity=g

also remember that other def must be indented properly as well

来源：https://stackoverflow.com/questions/53531121/processing-py-unknown-error-on-class-definition