i have things that requires processing and rarely changes except with certain events to take advantage of memcached. can i store a serial version of an object in a data field quickly?
How to double a number of binary digits in an integer? For example, if bin(x)="1001" then bin(y) must be "11000011". Is there any smart and fast algorithm ?
Is there a good way in Django to convert an entire model to a dictionary? I mean, like this:
class DictModel(models.Model):
key = models.CharField(20)
value = models.CharField(200)
DictModel.objects.all().to_dict()
... with the result being a dictionary with the key/value pairs made up of records in the Model? Has anyone else seen this as being useful for them?
Thanks.
Update
I just wanted to add is that my ultimate goal is to be able to do a simple variable lookup inside a Template. Something like:
{{ DictModel.exampleKey }}
With a result of DictModel.objects.get(key__exact=exampleKey).value
Overall, though, you guys have really surprised me with how helpful allof your responses are, and how different the ways to approach it can be. Thanks a lot.
take = raw_input('Please enter the string of numbers that compose code\n\n\t')
y = str(take)
l = []
for i in xrange(0, len(y), 3):
l.append(str(y[i:i+3]))
b = len(l)
a = 0
while(a!=b):
c = l[a].replace('444', ' ')
c = l[a].replace('111', 'a')
c = l[a].replace('112', 'b')
c = l[a].replace('113', 'c')
c = l[a].replace('114', 'd')
c = l[a].replace('115', 'e')
etc...
a = a + 1
filename = 'decmes.txt'
file = open(filename, 'w')
file.write(c)
file.close()
I can enter anything, just 111 for example and it gives me back the same thing I put in. Maybe it's something dumb, but I can't figure it out.
Write a function, called constrainedMatchPair which takes three arguments: a tuple representing starting points for the first substring, a tuple representing starting points for the second substring, and the length of the first substring. The function should return a tuple of all members (call it n) of the first tuple for which there is an element in the second tuple (call it k) such that n+m+1 = k, where m is the length of the first substring. Complete the definition
def constrainedMatchPair(firstMatch,secondMatch,length):
I am trying to get a list of all existing model fields and properties for a given object. Is there a clean way to instrospect an object so that I can get a dict of fields and properties.
class MyModel(Model)
url = models.TextField()
def _get_location(self):
return "%s/jobs/%d"%(url, self.id)
location = property(_get_location)
What I want is something that returns a dict that looks like this:
{
'id' : 1,
'url':'http://foo',
'location' : 'http://foo/jobs/1'
}
I can use model._meta.fields to get the model fields, but this doesn't give me things that are properties but not real DB fields.
This is code:
http://www.dpaste.de/Ij0S/
1,if there is a erorr (networking erorr,or Unhandled error in Deferred), the code stop.
I need this code running until all urls finish request. (May be the parallel function not work? )
2,when I write image to local filesystem, if meet erorr, there images may not complete.
Thanks!
Hi folks,
is it possible to give users the permission to view, but not to change or delete.
currently in the only permissions I see are "add", "change" and "delete"... but there is no "read/view" in there.
I really need this as some users will only be able to consult the admin panel, in order to see what has been added in.
Help would be amazing!
I'd like everything to function correctly, except when it's mobile, the entire site will used a set of specific templates.
Also, I'd like to autodetect if it's mobile. If so, then use that set of templates throughout the entire site.
Is there any "python's Generator" equivalent in JavaScript?
PS:
Python's Generator is very memory efficient when we need to do one time iterate through a big array, hash...
"Generators are iterables, but you can only read them once. It's because they do not store all the values in memory, they generate the values on the fly"
(Python's Generator explained in this thread: The Python yield keyword explained )
class a(object):
c=b()# how to call the b method
d=4
def __init__(self):
print self.c
def b(self):
return self.d+1
a()
how to call the 'b' method not in the __init__
thanks
"8,5,,1,4,7,,,,7,,1,9,3,6,,,8,6,3,9,,2,5,4,,,,,3,2,,,7,4,1,1,,4,,6,9,,5,,,,5,,,1,,6,3,,,6,5,,,,7,4,,1,7,6,,,,8,,5,,,7,1,,3,9,"
I'm doing a programming challenge where i need to parse this sequence into my sudoku script.
Need to get the above sequence into 8,5,0,1,4,7,0,0,0,7,0,1,9,3,6,0,0,8.........
I tried re but without success, help is appreciated, thanks.
Hello, I'm developing a web page in Django (using apache server) that needs to call a shell command to enable/dissable some daemons. I'm try to do it with
os.system(service httpd restart 1>$HOME/out 2>$HOME/error)
and this command doesn't return anything. Any idea how can i fix this?
I'm trying to use a third party application located here:
git://github.com/Star2Billing/django-audiofield.git
I'm using Aptana Studio as my IDE. I created my project and then I clicked on the project and imported the app from the github location. It looked like it imported. I wanted to check that it imported properly before beginning any real coding so I performed manage.py validate.
I got a message that stated: "No module named audiofield". I added the app to my Installed Apps settings and followed the installation instructions.
I'm not sure if I'm importing it incorrectly. Also, I'm using virtualenv in Aptana. I'm not sure if this may have added to the problem.
Please help.
| random_code | varchar(200) | YES | UNI | NULL | |
MyTable.objects.filter(random_code = None)
Is this correct? Will this SELECT where there is no random code set? Above is my table.
In a class method, I can add attributes using the built-in function:
setattr(self, "var_name", value).
If I want to do the same thing within a module, I can do something like:
globals()["var_name"] = value
Is this the best way to do this, or is there a more pythonic solution?
Hello all ,
I have a string like "SAB_bARGS_D" . What I want is that the string gets divided into list of characters but whenever there is a _ sign the next character gets appended to the previous one.
So the answer to above should be ['S','A','B_b','A','R','G','S_D']
It can be done by using a for loop traversing through the list but is there an inbuilt function that I can use.....
Thanks a lot
This is probably a really silly question but, given the example code at the bottom, how would I get a single list that retain the tuples?
(I've looked at the itertools but it flattens everything)
What I currently get is:
('id', 20, 'integer')
('companyname', 50, 'text')
[('focus', 30, 'text'), ('fiesta',
30, 'text'), ('mondeo', 30, 'text'),
('puma', 30, 'text')]
('contact', 50, 'text')
('email', 50, 'text')
what I would like is a single level list like:
('id', 20, 'integer')
('companyname', 50, 'text')
('focus', 30, 'text')
('fiesta', 30, 'text')
('mondeo', 30, 'text')
('puma', 30, 'text')
('contact', 50, 'text')
('email', 50, 'text')
def getproducts():
temp_list=[]
product_list=['focus','fiesta','mondeo','puma'] #usually this would come from a db
for p in product_list:
temp_list.append((p,30,'text'))
return temp_list
def createlist():
column_title_list = (
("id",20,"integer"),
("companyname",50,"text"),
getproducts(),
("contact",50,"text"),
("email",50,"text"),
)
return column_title_list
for item in createlist():
print item
Thanks
ALJ
I have a model called "Activity" in my django app. in the admin interface, it appears on the screen as "Activitys". how can I override the label on the admin page to make it "Activities" instead?
I see in the archives how to do this for a field, but not for a model itself. thanks!