can you call upon method in same class python code example

Example: python call function in the same class

# Add the argument ".self" before your function's name --> line 12

class ThisClass:
  	def __init__(self):
  		self.a_random_arg = a_random_arg
    
    def FirstDef(self):
   		[Here my function]
      
    def SecondDef(self):
    	if self.FirsDef:
          [following]