Combining the regex into single findall

Combining the regex into single findall - Printable Version

+- Python Forum (https://python-forum.io)
+-- Forum: Python Coding (https://python-forum.io/forum-7.html)
+--- Forum: General Coding Help (https://python-forum.io/forum-8.html)
+--- Thread: Combining the regex into single findall (/thread-10614.html)

Combining the regex into single findall - syoung - May-28-2018

Hello fellow Python Trekkers,

So, this program is a kind of prelude to a program involving SQLite. I'm not looking for help on that. At least not yet. I want to be able to take some fairly raw data from text files and turn them into rows and columns, as a next step.

But with that in mind, should I be trying to combine all of the findall expressions into a single list of lists, or is the approach I took going to be easier to handle ultimately? Some files that this program will be sorting through when I have the db program working properly may be MB long. So I am worried that if I do add them separately, I will take a big performance hit. Whether or not that's important, I don't really know. I am still very much a beginner.

Without further ado, here is the program:

import re


def test(input_data):
    # extracts strings from the test strings
    input_data = str(input_data)
    f_server = re.findall(r'^(![\w|d]+)', input_data)
    add_server(f_server)
    f_name = re.findall(r'^![\w|d]+\s([a-zA-Z|\(|\)|\'|\"|\&|\.|\s|\d|\w|\-|,]+)', input_data)
    add_file_name(f_name)
    f_size = re.findall('([\d\.]+KB|MB)$', input_data)
    add_file_size(f_size)


def add_server(f_server):
    # adds all server hits to a list
    server_list.append(f_server)


def add_file_name(f_name):
    # adds all file name hits to a list
    f_string = str(f_name[0])
    f_string = f_string.rstrip()
    file_name_list.append(f_string)


def add_file_size(f_size):
    # adds all file sizes to a list
    file_size.append(f_size)


server_list = []
file_name_list = []
file_size = []

# Sample data for testing
test("!FlipMoran 100 Best Science Fiction Novels - David Pringle.txt  ::INFO:: 14.9KB")
test("!dragnbreaker Aldiss, Brian W - SSC 21 - Man in His Time-The Best Science Fiction Of.jpg  ::INFO:: 24.8KB")
test("!dragnbreaker Aldiss, Brian W - SSC 21 - Man in His Time-The Best Science Fiction Of.rtf  ::INFO:: 840.4KB")
test("!pondering42 Bleiler, EF & Dikty, TE - Year's Best Science Fiction Novels - 1953 (html).rar  ::INFO:: 348.0KB")
print("Server list: ", server_list)
print("File name list: ", file_name_list)
print("File size list: ", file_size)

Regards and thanks in advance.