Question

For my homework assignment I need to write the body of this function, using the comments as my requirements. The other functions mentioned in the comments have been provided to me:

def eventfreq(year,month):

'''
  Read DOT1000.txt and return a list of (d,ct)
  pairs, where d is a date object of the form
     datetime.date(A,B,C)
  having A equal to the year argument and 
  B equal to the month argument to eventfreq(year,month).
  The ct part of each pair is the number of records 
  that had a date equal to datetime.date(A,B,C).

  One more requirement:  sort the returned list 
  in increasing order by date (the sorted function will
  do this for you)

  Use fieldict("DOT1000.txt") to get the dictionary
  of tuples used for building the list of pairs
  that eventfreq(year,month) will return.
  '''

This is my effort:

def eventfreq(year, month):
    N=fieldict('DOT1000.txt')[line][1]
    L = []  # empty List for accumulation
    for line in N:  # data file is standard input 

               st = N[1] # get datetime.date 
               (L[st] = L.get(st,0) + 1)

Answer 1

Try to check this:

def eventfreq(year, month):
    dates = [dt for x, dt, y in fieldict('DOT1000.txt') if dt.year==year and dt.month==month]
    return [(dt, dates.count(dt)) for dt in set(dates)