start working on SWF -> SABjson parser

.gitignore

 __pycache__
 .vscode
-out/*
\ No newline at end of file
+out/*
+
+workloads/*
+!workloads/KTH-SP2-1996-2.1-cln.swf

user_session_builder.py

+from workload import SwfField, Job
\ No newline at end of file

workload.py

+#!/usr/bin/env python3
+
+"""SWF types and functions."""
+
+from enum import Enum, unique
+
+
+@unique
+class SwfField(Enum):
+    """Maps SWF columns and their meaning."""
+
+    JOB_ID = 1
+    SUBMIT_TIME = 2
+    WAIT_TIME = 3
+    RUN_TIME = 4
+    ALLOCATED_PROCESSOR_COUNT = 5
+    AVERAGE_CPU_TIME_USED = 6
+    USED_MEMORY = 7
+    REQUESTED_NUMBER_OF_PROCESSORS = 8
+    REQUESTED_TIME = 9
+    REQUESTED_MEMORY = 10
+    STATUS = 11
+    USER_ID = 12
+    GROUP_ID = 13
+    APPLICATION_ID = 14
+    QUEUD_ID = 15
+    PARTITION_ID = 16
+    PRECEDING_JOB_ID = 17
+    THINK_TIME_FROM_PRECEDING_JOB = 18
+
+
+class Job:
+    """Class representing a job in the workload."""
+
+    def __init__(self,
+                 job_id,
+                 submit_time,
+                 finish_time,
+                 start_time=None,
+                 nb_requested_resources=None,
+                 walltime=None):
+        self.id = job_id
+        self.submit_time = submit_time
+        self.start_time = start_time
+        self.finish_time = finish_time
+        self.res = nb_requested_resources
+        self.walltime = walltime
+
+    def to_dict(self):
+        """Job object to dictionnary, for printing or json export."""
+        run_time = self.finish_time - self.start_time
+        return {
+            "id": self.id,
+            "profile": str(run_time),
+            "res": self.res,
+            "subtime": self.submit_time,
+            "walltime": self.walltime
+        }
+
+
+class Session:
+    """Class representing a user session."""
+
+    def __init__(self, id, first_submit):
+        self.id = id
+        self.first_submit = first_submit
+        self.preceding_sessions = []
+        self.tt_after_prec_sess = []
+        self.jobs = []
+
+    def to_dict(self):
+        """Session object to dictionnary, for printing or json export."""
+
+        return {
+            "id": self.id,
+            "first_submit_time": self.first_submit,
+            "preceding_sessions": self.preceding_sessions,
+            "thinking_time_after_preceding_session": self.tt_after_prec_sess,
+            "nb_jobs": len(self.jobs),
+            "jobs": [j.to_dict() for j in self.jobs]
+        }