refactor: change to logging framework

1_single_core_job/single_core_task.py

 from datetime import datetime
-import time
+
+import logging
 import os
+import time
+
+logger = logging.getLogger(__name__)
 
 def main():
     # Read environment variables.
@@ -13,12 +17,12 @@ def main():
     # This represents the calculations
     current_time = datetime.now()
     sleep_time = 60 - current_time.second
-    print('{} - Sleeping for {} seconds.'.format(current_time.strftime('%Y-%m-%d %H:%M:%S'), sleep_time))
+    logger.info('%s - Sleeping for %d seconds.',current_time.strftime('%Y-%m-%d %H:%M:%S'), sleep_time)
     time.sleep(sleep_time)
 
     # Printing some things to standard output.
-    print('\nJob ID:\t\t\t{name}\nJob name:\t\t{id}\nAllocated cores:\t{cores}\nAllocated memory:\t{mem}'.format(
-        id=JOB_ID, name=JOB_NAME, cores=NUMBER_OF_CORES,mem=MAXIMUM_MEMORY))
+    logger.info('\nJob ID:\t\t\t%s\nJob name:\t\t%s\nAllocated cores:\t%s\nAllocated memory:\t%s',
+        JOB_ID, JOB_NAME, NUMBER_OF_CORES,MAXIMUM_MEMORY)
 
     # Writing some output to a file based on the Slurm job id.
     output_file = '{}.txt'.format(JOB_ID)
@@ -26,7 +30,8 @@ def main():
         file.write('This file was created by the job {} with id {}\n'.format
                    (JOB_NAME, JOB_ID))
         
-    print('\nJob completed.')
+    logger.info('Job completed.')
 
 if __name__ == '__main__':
+    logging.basicConfig(level=logging.INFO)
     main()