Random Python helper functions

helpers.py

# encoding: utf-8

""" Python General Helpers
	 Copyright (c) 2010 Kenneth Reitz. Creative Commons Attribution 3.0 Lisense.
"""

import urllib, re, time
import paramiko

def enc(str):
	"""Encodes a string to ascii"""
	return str.encode('ascii', 'ignore')

def dec(str):
	"""Decodes a string to ascii"""
	return str.decode('ascii', 'ignore')

def get_file(path):
	"""Returns a file as a string"""
	return open(path, 'r').read()

def get_file_lines(path):
	"""Returns a file as a list of strings"""
	return open(path, 'r').readlines()

def get_http(uri):
	"""Fetches a file over http as a string"""
	return urllib.urlopen(uri).read()

def get_http_lines(uri):
	"""Fetches a file over http as a file object"""
	return urllib.urlopen(uri).readlines()

def get_sftp(hostname, username, password, filename):
	"""Fetches a file over sftp as a string
		Note: Server must be in known_hosts.
	"""

	client = paramiko.SSHClient()
	client.load_host_keys(keysPath=None)
	client.connect(hostname=hostname, username=username, password=password)

	file = client.open_sftp().open(filename).read()
	log("Download of %s complete" % filename)
	return file

def filename_from_url(url):
	"""Returns filename from url"""
	search = "(\w|[-.])+$"
	return re.search(search, url).group()

def sql_datetime():
	"""Returns SQL DateTime NOW() string"""
	return str(time.strftime("%Y-%m-%d %H:%M:%S"))