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from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from core.dbconn import *

# connect to work DB
    def connect_db(self):
        connstr = load_config()
        if connstr:
            engine = create_engine(connstr)
            self.db = DbSession()
            if self.db.db_session():
                user_conf = self.db.db_session.caoa_config.filter(self.db.db_session.caoa_config.os_user == self.os_user, self.db.db_session.caoa_config.os_platform == self.os_platform).first()
                if user_conf is None:
                    user_conf = self.db.db_session.caoa_config.filter(self.db.db_session.caoa_config.os_user == 'default', self.db.db_session.caoa_config.os_platform == self.os_platform).first()

                self.paths = {'path_imgimp': user_conf.path_imgimp, 'path_expfile':  user_conf.path_expfile, 'path_imgsave':  user_conf.path_imgsave, 'path_logfile': user_conf.path_logfile}
                self.units = {'unit_temp': user_conf.unit_temp, 'unit_weight': user_conf.unit_weight, 'unit_calc':  user_conf.unit_calc}
                img_formats = user_conf.img_formats
                self.img_formats = tuple(img_formats.split(';'))
                self.gui = {'gui_lang': user_conf.gui_lang, 'gui_font': user_conf.gui_font, 'gui_fontsize':  user_conf.gui_fontsize, 'gui_theme': user_conf.gui_theme}