I found an interesting python development method that can be done from a usb drive.
portableapps.com has many interesting apps:
1. commandprompt portable
2. notepad++ portable
3. sumatrapdf portable
4. putty portable
5. winscp portable
etc.
After installing portablepython
execute
SPE-Portable.exe
open manage.py
and run (F9) with argument “runserver”
Then,
import datetime
If you don’t want to refer to the elements of a collection by their position number but prefer some other type of object as a key,
use a python dictionary
———–
e.g.,
>>> tel = {'jack': 4098, 'sape': 4139} >>> tel['guido'] = 4127 >>> tel {'sape': 4139, 'guido': 4127, 'jack': 4098} >>> tel['jack'] 4098 >>> del tel['sape'] >>> tel['irv'] = 4127 >>> tel {'guido': 4127, 'irv': 4127, 'jack': 4098} >>> tel.keys() ['guido', 'irv', 'jack'] >>> 'guido' in tel True
Python tuple
consist of a number of objects which can be referenced by their position number within the object.
———
e.g.,
fruit = (“Apple”,”Banana”,”Cherry”,”Fig”,”Grapefruit”)
__unicode__
is for displaying objects.
———–
For example,
>>>p = Card.objects.create(name=’Hot Pot’, city=’San Diego’)
>>>card_list = Card.objects.all()
>>>card_list
[<Card: Card object>]
without __unicode__, you will see just “Card object”
if you define __unicode__
def __unicode__(self):
return self.name
then, you will see
[<Card: Hot Pot>]
Pygments
takes a source code and
outputs a beautiful looking code.
def func(*args, **kwargs):
Python functions and methods can pass and receive arguments in two forms:
1. positional argument (the order is important)
2. keyword argument(names along with the values)
—
In Python, list and dictionary types are used for positional and keyword arguments respectively.
Passing a list as an argument and prefixing it with a single asterisk(*) will cause each item of the list in order. This will be used as a separate positional argument.
Passing a dictionary and prefixing it two asterisks(**) will cause the keys of the dictionary to be used as names for separate keyword arugments and the dictionary’s values to become the values of these arguments.
lower()
is a Python string method to return a string converted to lowercase
—-
e.g.,
def get_absolute_url(self):
return “/card/%s/%s/” % (self.pub_date.strftime(“%Y/%b/%d”).lower(), self.slug)
