python Programming Glossary: race

Check if a file is not open( not used by other process) in Python

http://stackoverflow.com/questions/11114492/check-if-a-file-is-not-open-not-used-by-other-process-in-python

is being used by another process is the possibility of a race condition. You could check a file decide that it is not in use.. for nt in flist print t nt.path # This catches a race condition where a process ends # before we can examine its files..

Create a temporary FIFO (named pipe) in Python?

http://stackoverflow.com/questions/1430446/create-a-temporary-fifo-named-pipe-in-python

here. The security issue with using tempfile.mktemp is the race condition where it is possible for an attacker to create a file..

Python C program subprocess hangs at “for line in iter”

http://stackoverflow.com/questions/20503671/python-c-program-subprocess-hangs-at-for-line-in-iter

timeout dead subprocess assert not select master 0 0 # race is possible os.close slave_fd # subproces don't need it anymore..

Fastest way to list all primes below N in python

http://stackoverflow.com/questions/2068372/fastest-way-to-list-all-primes-below-n-in-python

recipe from Cookbok 710ms EDIT ~unutbu is leading the race . python optimization math project euler primes share improve..

The Python yield keyword explained

http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained

Let's see the possible orders of arrival for a 4 horse race horses 1 2 3 4 races itertools.permutations horses print races.. orders of arrival for a 4 horse race horses 1 2 3 4 races itertools.permutations horses print races itertools.permutations.. horses 1 2 3 4 races itertools.permutations horses print races itertools.permutations object at 0xb754f1dc print list itertools.permutations..

Read and overwrite a file in Python

http://stackoverflow.com/questions/2424000/read-and-overwrite-a-file-in-python

If you don't want to close and reopen the file to avoid race conditions you could truncate it f open filename 'r ' text f.read..

Create directory if it doesn't exist for file write

http://stackoverflow.com/questions/273192/create-directory-if-it-doesnt-exist-for-file-write

directory As noted in comments and elsewhere there's a race condition if the directory is created between the os.path.exists..

Atomic operations in Django?

http://stackoverflow.com/questions/280075/atomic-operations-in-django

and save. My concern is that this process is totally a race. Two requests could simultaneously check to see if the entity.. in the tutorial in fact it looks like the tutorial has a race condition in the Vote part of it . How do I do this safely .. of it . How do I do this safely python database django race condition share improve this question This is a bit of a..

Try/catch or validation for speed?

http://stackoverflow.com/questions/5589532/try-catch-or-validation-for-speed

component wise addition. This code is being used for a raytracer so any speed boosts are great. Here's a simplified version.. thrown not thrown cases Whether or not there is a race condition that prevents the use of LBYL That last point is the.. needs to be addressed first if there is a potential for a race condition then you have no choice you must use exception handling...

Are urllib2 and httplib thread safe?

http://stackoverflow.com/questions/5825151/are-urllib2-and-httplib-thread-safe

opener global _opener _opener opener There is an obvious race condition when concurrent threads call install_opener and urlopen..

Why is it “Easier to ask forgiveness than permission” in python, but not in Java? [closed]

http://stackoverflow.com/questions/6092992/why-is-it-easier-to-ask-forgiveness-than-permission-in-python-but-not-in-java

the call stack so that you can display it later in stack trace. This process can take hundreds or thousands of machine instructions.. or thousands of machine instructions and if no stack trace is ever produced as in this example that is just wasted CPU.. open your code can still throw IOException anyway due to race conditions e.g. someone changes the file permissions between..

How do I check if a file exists using Python?

http://stackoverflow.com/questions/82831/how-do-i-check-if-a-file-exists-using-python

someone will have created or deleted the file. This is a race condition that can often lead to security vulnerabilities. An..