Connect to the ftp server and retrieve all NOAA quantitative predictive forecast (QPF) resources for day one.

noaa_ftp.py

# import modules
from ftplib import FTP
import os

def get_day_one(directory_target):
    """
    Retrieve zero to 30 hour precipitation forecasts
    """
    # ftp url
    url = 'ftp.hpc.ncep.noaa.gov'
    
    # directory to find files
    directory_ftp = '/shapefiles/qpf/day1'
    
    # set of resources
    resources = (
        'QPF24hr_Day1_latest.tar'   # cumulative 24 hour
        ,'QPF6hr_f00-f06_latest.tar'# 0-6 hour
        ,'QPF6hr_f06-f12_latest.tar'# 6-12 hour
        ,'QPF6hr_f12-f18_latest.tar'# 12-18 hour
        ,'QPF6hr_f18-f24_latest.tar'# 18-24 hour
        ,'QPF6hr_f24-f30_latest.tar'# 24-30 hour
    )
    
    # create FTP object instance referencing the NOAA server
    ftp = FTP(url)
    
    # login to the server
    ftp.login()
    
    # change the ftp current working directory to the day one directory
    ftp.cwd(directory_ftp)
    
    # change the local current working directory to the function parameter
    os.chdir(directory_target)
    
    # iterate files
    for resource in resources:
        #