pipelined generator

[akbarza]

hi
in the below code, pipelined generator has been used to sum values in a" techcrunch.csv" file and the code is in site:
https://realpython.com/introduction-to-p...generators

file_name = "techcrunch.csv"
lines = (line for line in open(file_name))
list_line = (s.rstrip().split(",") for s in lines)
cols = next(list_line)
company_dicts = (dict(zip(cols, data)) for data in list_line)
funding = (
    int(company_dict["raisedAmt"])
    for company_dict in company_dicts
    if company_dict["round"] == "a"
)
total_series_a = sum(funding)
print(f"Total series A fundraising: ${total_series_a}")

it is some ambiguous, however, at the end of the page has suggested changing this code so that in addition to sum, the average of the values should be calculated.
I thought about it, but I did not find anything.
do you have any suggestions?

second question:
(in IDLE), when I want to see the methods of a generator, I first create a generator and then I write dir(name of the generator).
it is time-consuming.
is it possible to without creating a generator, see methods related to generators? ( for string, without creating a string, I write dir(str))
also, I have this question about the result of the command"file=open(address)". namely, i want dir(f) without creating f.
I always do this time-consuming:
f= open(an address of a file)
dir(f)


thanks