old_contents: import requests
  import os
  import sys
  import json
  import datetime
  import urllib
  from dateutil import parser
  
  
  
  
  """
  Pulls the latest published images of Earth from NASA's EPIC project.
  """
  def main():
  	localDir = "" #Local directory you want to save images to
  	try:
  		files = [f for f in os.listdir(localDir)]
  	except (WindowsError):
  		print ("Please edit line 16 to include your local directory")
  		sys.exit(0)
  	#Uncomment line below if you wish to remove old files when fetching new ones
  	#deleteOldFiles(localDir)
  	fetched = requests.get(
  		"https://api.nasa.gov/EPIC/api/natural/images?api_key=DEMO_KEY")
  	data = json.loads(fetched.content)
  	date = parser.parse(data[0]["date"])
  	formattedDate = dateFormatter(date)
  	for item in data:
  		name = item['image'] + ".jpg"
  		url = "https://epic.gsfc.nasa.gov/archive/natural/" \
  			+ formattedDate + "/jpg/" + name
  		localName = localDir + name
  		urllib.urlretrieve(url, localName)
  
  
  """
  Helper method for formatting date properly
  
  Parameters
  ------------
  date : dateTime
  	the date being formatted
  """
  def dateFormatter(date):
  	year = str(date.year)
  	month = str(date.month)
  	day = str(date.day)
  	if len(month) == 1:
  		month = '0' + month
  	if len(day) == 1:
  		day = '0' + day
  	formattedDate = year + '/' + month + '/' + day
  	return formattedDate
  
  """
  Helper method for removing old files from a directory
  
  Parameters
  -----------
  dir : string
  	the directory we are emptying
  
  """
  def deleteOldFiles(dir):
  	files = [f for f in os.listdir(localDir)]
  	for file in files:
  		localFile = localDir + file
  		os.remove(localFile)
  
  main()
new_contents: import requests
  import os
  import sys
  import json
  import datetime
  import urllib
  from dateutil import parser
  
  
  
  
  """
  Pulls the latest published images of Earth from NASA's EPIC project.
  """
  def main():
  	localDir = "" #Local directory you want to save images to
  	try:
  		files = [f for f in os.listdir(localDir)]
  	except (WindowsError):
  		print ("Please edit line 16 to include your local directory")
  		sys.exit(0)
  	#Uncomment line below if you wish to remove old files when fetching new ones
  	#deleteOldFiles(localDir)
  	fetched = requests.get(
  		"https://api.nasa.gov/EPIC/api/natural/images?api_key=DEMO_KEY")
  	data = json.loads(fetched.content)
  	date = parser.parse(data[0]["date"])
  	formattedDate = dateFormatter(date)
  	for item in data:
  		name = item['image'] + ".jpg"
  		url = "https://epic.gsfc.nasa.gov/archive/natural/" \
  			+ formattedDate + "/jpg/" + name
  		localName = localDir + name
  		urllib.urlretrieve(url, localName)
  
  
  """
  Helper method for formatting date properly
  
  Parameters
  ------------
  date : dateTime
  	the date being formatted
  """
  def dateFormatter(date):
  	year = str(date.year)
  	month = str(date.month)
  	day = str(date.day)
  	if len(month) == 1:
  		month = '0' + month
  	if len(day) == 1:
  		day = '0' + day
  	formattedDate = year + '/' + month + '/' + day
  	return formattedDate
  
  """
  Helper method for removing old files from a directory
  
  Parameters
  -----------
  dir : string
  	the directory we are emptying
  
  """
  def deleteOldFiles(directory):
  	files = [f for f in os.listdir(directory)]
  	for file in files:
  		localFile = directory + file
  		os.remove(localFile)
  
  main()
  
subject: fix deleteOldFiles helper function