python snippets

append_csv.py

def append_csv(filename, value):
    """This will append a vaule to a csv file.
        args:
            filename (str): full path or relative path of the csv file. 
            value (str): string to append to the csv file.
        Return: None
    """
    with open(filename, 'a') as openFile:
        openFile.write('\n{}'.format(value))

logging_function.py

import os
import logging

def log_config():
    # Logging configuration
    fmtstr = "%(asctime)s: %(levelname)s - %(message)s"
    logging.basicConfig(
        filename='tracking.log',
        level=logging.INFO,
        filemode='a',
        format=fmtstr
    )

    # Log when script runs with machine name and script name
    logging.info('{} started {}'.format(
        socket.gethostname(), os.path.basename(__file__)))

read_csv.py

import csv

def read_csv(filename):
    """This will import single column csv files.
        args:
            filename (str): full path or relative path of the csv file. 
        Return (list): list of row values in the csv file.
    """
    final_list = []
    with open(filename, 'r') as openFile:
        reader = csv.reader(openFile)
        for row in reader:
            final_list.append(row[0])
    return final_list

today+n_days.py

from datetime import datetime

today = datetime.now()
plus_days = 7
final_date = today + timedelta(days=int(plus_days))