write a program to find the sum of the logarithms of all the primes from 2 to some number n, and print out the sum of the logs of the primes, the number n, and the ratio of these two quantities in python
What is the most straightforward way of making dictionary or list from a string in Python? Let's say I have string "{ 'x' : 3, 'y' : 4 }" and I want to parse it to a real dictionary object.
Hi,
I'm trying to send a Python list in to client side (encoded as JSON), this is the code snippet which I have written:
array_to_js = [vld_id, vld_error, False]
array_to_js[2] = True
jsonValidateReturn = simplejson.dumps(array_to_js)
return HttpResponse(jsonValidateReturn, mimetype='application/json')
So my question is how to access it form client side, can I access it like this:
jsonValidateReturn[0]
or how I assign a name to the returned JSON array in order to access it?
I am trying to host some files/rails app in the port 8080 for external access. For python I am using the SimpleHTTPServer module, and for rails, webrick. However, both of them does not work very well. I don't get the response back, and, sometimes, if I get it, it's VERY slow. Nevertheless, apache works very well on the port 8080 (i am not running them at the same time). What is going on?
I am trying to create my own class of dictionary in python 3 which has a field of dict variable and setitem and getitem methods. Though, it doesnt work for some reason. Tried to look around but couldn't find the answer.
class myDictionary:
def __init(self):
self.myDic={}
def __setitem__(self, key, value):
self.myDic[key]=value
I'm getting:
'myDictionary' object has no attribute 'myDic'
Any ideas? :)
Hi all
I have the following 4 arrays ( grouped in 2 groups ) that I would like to merge in ascending order by the keys array.
I can use also dictionaries as structure if it is easier.
Has python any command or something to make this quickly possible?
Regards
MN
# group 1
[7, 2, 3, 5] #keys
[10,11,12,26] #values
[0, 4] #keys
[20, 33] #values
# I would like to have
[ 0, 2, 3, 4, 5, 7 ] # ordered keys
[20, 11,12,33,26,33] # associated values
Which are the most advanced frameworks and tools there are available for python for practicing Behavior Driven Development? Especially finding similar tools as rspec and mocha for ruby would be great.
The topic title pretty much says it all. Does anyone know how the built in dictionary type for python is implemented? My understanding is that it is some sort of hash table, but I haven't been able to find any sort of definitive answer.
I want to print in the terminal with colors ? how can I do that in python ?
Another questions what is the best character that when it is printed it look like a box [brick] ?
I want to print colored blocks, it is part of game :)
I want to do a very simple webserver in python able to receive XML document over HTTP and then to send as response XML document.
Do you have any example?
just to understand How arrange the work...
many thanks!
I am looking for a good Tree data structure class. I have come across this package, but since I am relatively new to Python (not programming), I dont know if there are any better ones out there.
I'd like to hear from the Pythonistas on here - do you have a favorite tree script that you regularly use and would recommend?
Hello,
I'll just show some code to show how I do web development in PHP.
<html>
<head>
<title>Example #3 TDavid's Very First PHP Script ever!</title>
</head>
<? print(Date("m/j/y"));
require_once("somefile.php");
$mysql_db = "DATABASE NAME";
$mysql_user = "YOUR MYSQL USERNAME";
$mysql_pass = "YOUR MYSQL PASSWORD";
$mysql_link = mysql_connect("localhost", $mysql_user, $mysql_pass);
mysql_select_db($mysql_db, $mysql_link);
$result = mysql_query("SELECT impressions from tds_counter where COUNT_ID='$cid'", $mysql_link);
if(mysql_num_rows($result)) {
mysql_query("UPDATE tds_counter set impressions=impressions+1 where COUNT_ID='$cid'", $mysql_link);
$row = mysql_fetch_row($result);
if(!$inv) {
print("$row[0]");
}
}
?>
<body>
</body>
</html>
Thats it. I write every file like this. Recently, I learnt OOP and started using classes & objects in PHP.
I hear that there are many frameworks there for PHP. They say that one must use these libraries. But I feel they are just making things complicated.
Anyway, this is how I've been doing my web development. Now, I want to improve this. and make it professional. Also I want to move to Python. I searched SO archives and found everyone suggesting Django. But, can any one give me some idea about how web development in Python works?
user (client) request for page ---
webserver(-embedded PHP interpreter)
---- Server side(PHP) Script --- MySQL Server.
Now, is it that instead of PHP interpreter there is python interpreter & instead of php script there is python script, which contains both HTML & python (embedded in some kind of python tags). Python script connects to database server and fetches some data which will be printed as HTML. or is it different in python world?
Is this Django thing like frameworks for PHP? Can't one code in python without using Django. Because, I never encountered any post without django
Please give me some kick start.
I'm working on a python class that is being shared between two products. 90% of the functionality applies to both products. For the 10% that's different the code is littered with this kind of thing:
#Start of file
project = 'B'
#Some line of code
if project == 'A':
import moduleA
elif project == 'B':
import moduleB
#Many lines of code
if project == 'A':
print moduleA.doA(2)
elif project == 'B':
print moduleB.doB(2)
This doesn't seem very elegant or very readable, has anyone encountered this sort of thing before? Are there better ways of doing it?
I am looking for a GUI python module that is best suited for the following job:
I am trying to plot a graph with many columns (perhaps hundreds), each column representing an individual. The user should be able to drag the columns around and drop them onto different columns to switch the two. Also, there are going to be additional dots drawn on the columns and by hovering over those dots, the user should see the values corresponding to those dots. What is the best way to approach this?
I have a shell that runs CentOS
For a project I'm doing I need python 2.5+ but centOS is pretty dependent on 2.4
From what I've read a number of things will break if you upgrade to 2.5
I wan't to install 2.5 separately from 2.4 but I'm not sure how to do it. So far I've downloaded the source tarball, untarred it and did a ./configure --prefix=/opt which is where I want it to end up. can I now just make, make install ? or is there more?
How can I combine 2 ints to a single 32bit IEEE floating point ? (each of the 2 ints represent 16 bit)
And in the opposite direction: How can I transform a python float into 2 16 bit ints?
(I need this because of modbus protocol - where 2x16 bit registers are treated as single 32 floating point number)
What is the best way to store the cards and suits in python so that I can hold a reference to these values in another variable?
For example, if I have a list called hand (cards in players hand), how could I hold values that could refer to the names of suits and values of specific cards, and how would these names and values of suits and cards be stored?
I am looking to make a python script be unique in the sense that it can only run once at a time. For example if I run the script and open another session of the same script a second time and the first session is still running, then the second session will just exit and do nothing. Anyone knows how I could implement this?
I would like to know if there is something similar to PHP natsort function in python?
l = ['image1.jpg', 'image15.jpg', 'image12.jpg', 'iamge3.jpg']
l.sort()
gives:
['image1.jpg', 'image12.jpg', 'image15.jpg', 'iamge3.jpg']
but I would like to get:
['image1.jpg', 'iamge3.jpg', 'image12.jpg', 'image15.jpg']
I've been reading the Python 3.2 docs about string formatting but it hasn't really helped me with this particular problem.
Here is what I'm trying to do:
stats = { 'copied': 5, 'skipped': 14 }
print( 'Copied: {copied}, Skipped: {skipped}'.format( stats ) )
The above code will not work because the format() call is not reading the dictionary values and using those in place of my format placeholders. How can I modify my code to work with my dictionary?
I want certain functions in my application to only be accessible if the current user is an administrator.
How can I determine if the current user is in the local Administrators group using Python on Windows?
What's the easiest way to play a sound file (.wav) in Python? By easiest I mean both most platform independent and requiring the least dependencies. pygame is certainly an option, but it seems overkill for just sound.
I am looking to make a python script be unique in the sense that it can only run once at a time. For example if I run the script and open another session of the same script a second time and the first session is still running, then the second session will just exit and do nothing. Anyone knows how I could implement this?