How to skip pre header lines with csv.DictReader?

Question

I want to csv.DictReader to deduce the field names from the file. The docs say \"If the fieldnames parameter is omitted, the values in the first row of the

Answer 1

I used islice from itertools. My header was in the last line of a big preamble. I have passed preamble and used hederline for fieldnames:

with open(file, "r") as f:
    '''Pass preamble'''
    n = 0
    for line in f.readlines():
        n += 1
        if 'same_field_name' in line: # line with field names was found
            h = line.split(',')
            break
    f.close()
    f = islice(open(i, "r"), n, None)

    reader = csv.DictReader(f, fieldnames = h)