I get an UnboundLocalError because I use a template value inside an if statement which is not executed. What is the standard way to handle this situation? class Test(webapp.RequestHandler): def get(self): user = users.get_current_user() if user: greeting = ('Hello, ' + user.nickname()) else...
Hello everyone, I have a question about sharing queues between processes in Python. Below, I have three queues, one main process, and three inner processes. Each inner process will be adding and getting values from the various queues (they need easy access to the queues). I think it works as it is right now, but this code is the found...
Hi there I need to convert a matrix to a list as the example below Matrix: [[ 1. 6. 13. 10. 2.] [ 2. 9. 10. 13. 15.] [ 3. 15. 13. 14. 16.] [ 4. 5. 14. 13. 6.] [ 5. 18. 16. 4. 3.] [ 6. 7. 12. 18. 3.] [ 7. 1. 8. 17. 11.] [ 8. 14. 5. 4. 16.] [ 9. 16. 18. 17. 15.] [ 10. 8...
I'm developing a Java program through Eclipse locally, and debugging on a remote machine. Whenever I make a change to my program, I copy the corresponding class file to the bin directory on the remote machine. I run my program (a simulator) through a python script via the OS.system command. The problem is that my program sometimes does...
class all_items(dict): def __getitem__(self, key): return 1 >>> eval("undefined",dict(),all_items()) 1 >>> eval("undefined",all_items(),dict()) Traceback (most recent call last): File "<pyshell#2>", line 1, in <module> eval("undefined",all_items(),dict()) File "<string>", line 1, in <module> NameError: name 'undefined...
Here's my current code: print(list[0], list[1], list[2], list[3], list[4], sep = '\t') I'd like to write it better. But print('\t'.join(list)) won't work because list elements may numbers, other lists, etc., so join would complain. ...
I really want tobuild a web application (something simple, maybe a database of pokemon cards for instance..) I've heard excellent things about django, wheres the best place to start? ...
Hi everyone, i would like to create a source code analyser for Java Project (like FindBugs and other static analysis programs) that would be able to detect certain method calls. I would prefer to do it using Python, but any advice would be great ! I'm going to start by studying the FindBugs source code, but if anyone could explain to...
I use vars() function for the first time, and noticed this behaviour: nodes = ['one', 'two', 'three'] for node in nodes: vars()[node + '_'] = 'some calc ' + node vars()[node] = vars()[node + '_'] print one With this snippet Python outputs some calc one as expected, but if I use it inside function like this: def main(): ...
Python 2.7/Windows: My understanding is that we can load custom mouse cursors using the cursor='@file.cur' syntax: widget = tkinter.Label( ..., cursor='@help.cur' ) Here's the traceback I receive: Traceback (most recent call last): File "<pyshell#82>", line 1, in <module> widget.config( cursor='@help.cur' ) File "C:\Python27\...
Working with a couple of lists, iterating over each. Here's a code segment: self.links = [] self.iter=iter(self.links) for tgt in self.links: for link in self.mal_list: print(link) if tgt == link: print("Found Suspicious Link: {0}".format(tgt)) self.count += 1 else: self.coun...
Python: How to get the sum of timedelta? Eg. I just got a lot of timedelta object, and now I want the sum. That's it! ...
$ py twitterDump2.py Traceback (most recent call last): File "twitterDump2.py", line 30, in <module> stream=tweepy.Stream(username,password,listener) TypeError: __init__() takes exactly 3 arguments (4 given) My code: username="abc" password="abc" listener = StreamWatcherListener() stream=tweepy.Stream(username,password,listener...
Is there a way to enable a package to be executed as a script? For example: [~]# easy_install /path/to/foo.egg ... [~]# python -m foo --name World Hello World I've tried creating a __main__.py file inside my package but it's not being executed (I'm using Python 2.6). The following error is raised: foo is a package and cannot be dire...
from getpass import getpass from textwrap import TextWrapper import tweepy import time class StreamWatcherListener(tweepy.StreamListener): status_wrapper = TextWrapper(width=60, initial_indent=' ', subsequent_indent=' ') def on_status(self, status): try: print self.status_wrapper.fill(status.text) ...
It seems as if MySQLdb is restricting the maximum transfer size for SQL statements. I have set the max_allowed_packet to 128M for mysqld. MySQL documentation says that this needs to be done for the client as well. ...
At the end of python PEP8 I'm reading: Don't compare boolean values to True or False using == Yes: if greeting: No: if greeting == True: Worse: if greeting is True: I have no problem with that recommandation when the boolean is True, but it sounds strange when checking for False If I want to know if variable greeting is False...
I try to create a configuration file, where I can store constants. Whenever I try with ConfigParser, I get an error Traceback (most recent call last): File "/home/baun/google_appengine/google/appengine/ext/webapp /__init__.py", line 511, in __call__ handler.get(*groups) File "/home/baun/workspace/octopuscloud/s3/S3.py",...
When trying to run django-celery with beat scheduler: bin/django celeryd -B --settings=app.development --loglevel=INFO I got this exception: Process Beat: Traceback (most recent call last): File "/usr/local/lib/python2.6/dist-packages/multiprocessing/process.py", line 237, in _bootstrap self.run() File "/home/user/eggs/celery-2.1.1-p...
37.807614 to 37.786996 The randomly generated double must have the same precision (num of digits) as those above. For example, 37.792242 would be good, whereas 37.7823423425 would be bad. ...