fix datetime issue (#29)

- fix datetime issue (2afaf208adf592b8c13523bb479d138b40e93637)

data_sources/upload_file.py

@@ -65,12 +65,16 @@ def process_data_upload(data_file, session_hash):
 
         for column in df.columns:
             if type(column) is str:
-                pattern = 'year|month|date|day|time'
-                if re.search(pattern, column.lower()):
+                if "date" in column.lower() or "time" in column.lower():
                     try: 
                         df[column] = pd.to_datetime(df[column])
                     except:
                         pass
+                if 'year' in column.lower():
+                    try: 
+                        df[column] = pd.to_datetime(df[column], format='%Y')
+                    except:
+                        pass
             if df[column].dtype == 'object' and isinstance(df[column].iloc[0], list):
                 df[column] = df[column].explode()