Using the same variable in multiple functions in a class-CodePudding

I created a variable conID in one function and I want to use it in another. Both functions are inside a class.

The problem is that in the second function the first function is called, so self.reqSecDefOptParams calls the first function. And after that conID receives it value. If I try to output condID in the second function I can't, it says its value is still None. Is there a way to first call the first function and then output the value in the same function?

The first function:

def contractDetails(self, reqId: int, contractDetails: ContractDetails):
    string = str((contractDetails))
    letter_list = string.split(",")
    print(letter_list)
    conID = letter_list[90]  # the variable I need

The second function:

def start(self):
   # using the variable again
   self.reqSecDefOptParams(1, contract.symbol, "", "STK", conID)

CodePudding user response：

Welcome @LaForge1071! You have a few ways you can do this! One way you might do this is by passing the variable to the new function like this

def func_a():
    foo = 'bar'
    func_b(foo)


def func_b(var):
    print(var)

func_a()

or, and I don't recommend this, you can use global scope to solve this like so,

def func_a():
    global foo
    foo = 'bar'
    func_b()


def func_b():
    print(foo)

func_a()

CodePudding user response：

You said both function are in one class, so maybe declare the variable to be a class variable:

class A:
   def __init__(self):
      self.foo = None


   def func_a(self):
      self.foo = "Hello"


   def func_b(self):
      if self.foo is not None:
         print(self.foo)

CodePudding user response：

you can declare this variable in init funciton ,just like constrution function in c/c .

def __init__(self):
      self.foo = init_value