从X行读取带有fileinput.input（）的文件

Question

here my question, it is probably not very complex but I am learning Python. I'm trying to read multiple files (all of them with the same format), at the same time a have to begin reading them from line 32, somehow I don't find the most efficient way to do so.

Here my code until now:

for file in fileinput.input():
    entries = [f.strip().split("\t") for f in file].readlines()[32:]

which gives the error: AttributeError: 'list' object has no attribute 'readlines'

I know another possibility would be:

sources = open(sys.argv[1], "r").readlines()[32:]

and then just on the command line python3.2 script.py data/*.csv. But this seems not to work properly.

I am thanked for any help.

Answer 1

It's just a little syntax

 entries = [f.strip().split("\t") for f in file].readlines()[32:]

should be:

entries = [f.strip().split("\t") for f in file.readlines()][32:]

Answer 2

You can use openhook argument.

According to the module documentation :

You can control how files are opened by providing an opening hook via the openhook parameter to fileinput.input() or FileInput() . The hook must be a function that takes two arguments, filename and mode, and returns an accordingly opened file-like object. Two useful hooks are already provided by this module.

import fileinput

def skip32(filename, mode):
    f = open(filename, mode)
    for i in range(32):
        f.readline()
    return f

entries = [line.strip().split('\t') for line in fileinput.input(openhook=skip32)]

BTW, the last line can be replaced with (using csv module):

import csv
entries = list(csv.reader(fileinput.input(openhook=skip32), delimiter='\t'))