Undefined variable error for calling a object constructor

I have a class ReadBugXML in a folder called code and I added a __init__.py to make the code as a package. main.py and code are in the root folder. My main file looks like this.

import sys
from code import *

def main():
    bug_report = ReadBugXML('bugreports.xml')
    report, structure = bug_reports.read_bugs()

    print(report[0])

if __name__ == "__main__":
    main()

This is how my code\ReadBugXML.py look like

import os

class ReadBugXML:
    def __init__(self, filename):
        curr_dir = os.getcwd()
        data_file_path = os.path.join(curr_dir, 'data', filename)
        try:
            self.bug_file = open(data_file_path, encoding='utf8')
        except IOError:
            print('The file is missing!')

    def read_bugs(self):
       # read the xml and return a list 

I have tried different import statements but didn't work out.

I expected that the object will be created. But it doesn't create any. I have tested the code within the ReadBugXML.py by creating an object and calling the function. It did work. But calling in the main seems to be the problem. I don't know how to fix the import for user-defined classes.

Instead, I am getting a pylint error 'Undefined variable ReadBugXML' in VSCode. Running the main file gives NameError: name ReadBugXML is not defined.

Note: I am using VSCode (win 10) as an editor and python 3.6 is the interpreter.