Update Mimic4Dataset.py

Mimic4Dataset.py

@@ -709,7 +709,7 @@ class Mimic4Dataset(datasets.GeneratorBasedBuilder):
     DEFAULT_CONFIG_NAME = "Mortality"
         
     def create_cohort(self):
-        if self.config.name==None:
+        if self.config_path==None:
             if self.config.name == 'Phenotype' : self.config_path = _CONFIG_URLS['phenotype'] 
             if self.config.name == 'Readmission' : self.config_path = _CONFIG_URLS['readmission'] 
             if self.config.name == 'Length of Stay' : self.config_path = _CONFIG_URLS['los']