function call behaves differently in a class vs w/o class in python3

Here is my code:

#Check if the value has only allowed characters
def checkStr(value):
         return (set(value) <= allowed)
#Enter parameter
def enterParam (msg)
   value=input(msg)
   if len(value) == 0:
      print("Cannot be empty, try again")
      enterParam(msg)
   if not checkStr(value):
      print("incorrect symbols detected, try again")
      enterParam(msg)
   return value

Now my question is: This works OK inside the body of the script, but as soon as i put inside a class like below the eclipse/pydev starts complaining about enterParam and checkStr not being defined. What am i doing wrong?

class ParamInput:
    #Check if the value has only allowed characters
    def checkStr(self, value):
             return (set(value) <= allowed)
    #Enter parameter
    def enterParam (self, msg)
       value=input(msg)
       if len(value) == 0:
          print("Cannot be empty, try again")
      开发者_StackOverflow    enterParam(msg) #<==== not defined
       if not checkStr(value): #<====not defined
          print("incorrect symbols detected, try again")
          enterParam(msg) #<====not defined
       return value

You need to call the methods as self.enterParam() and self.checkStr().

(Also note that the Python style guide PEP 8 recommends to name methods like enter_param() and check_str() -- CamelCase is only used for class names in Python.