code: def readLog(fname="workdays.csv",onlyAfter=datetime.datetime(year=2017,month=1,day=1)):
      
      with open(fname) as f:
          raw=f.read().split("\n")
      efforts=[] #date,nickname
      for line in raw[1:]:
          line=line.strip().split(",")
          date=datetime.datetime.strptime(line[0], "%Y-%m-%d")
          if onlyAfter and date<onlyAfter:
              continue
          if len(line)<3:
              continue
          for project in line[2:]:
              project=project.strip()
              if len(project):
                  efforts.append([date,project])
      return efforts
docs: return a list of [stamp, project] elements.