Trying To Find The Average Of Multiple Values In A Dictionary

New to python here. Trying to get find the average of totaled up keys in a dictionary. I've managed to grab the total of all values for each key, but I'm not certain how to find th

Solution 1:

You already store a count with each list of values; simply loop over the dictionary items (key-value) pairs and use the last element of the value lists:

for key, values in d.items():
    avg = [v / values[-1] for v in values[:-1]]
    print(key, *avg)

This uses the last element of each values list as the row count, and uses a list comprehension to produce an average value for each of your columns.

Some other remarks:

• you evidently have a CSV file; consider using the csv module instead.

• you never called the f.close() method; you merely referenced it.

  However, you should consider using the file object as a context manager instead. The with statement ensures that the file is closed for you when the block is exited:

  withopen("iris.data", "r") as f:
      for line in f:
          line = line.rstrip('\n')
          ifnot line:
              continue

Solution 2:

You can convert the values to a list, then sum, and divide by the length of the list:

values = d.values()
average_value = sum(values) / len(values)

Since the values are lists, perhaps you can get the average for each list:

for v in d.values():
    average_value = sum(v) / len(v)