python Programming Glossary: calculatedPython: Reducing memory usage of dictionary http://stackoverflow.com/questions/10264874/python-reducing-memory-usage-of-dictionary count type pointer size information space for the lazily calculated hash code state information e.g. used for interned strings a.. and in particular string objects for reference counts pre calculated hash codes etc. is more than you'd think at first There is hardly..
django - convert a list back to a queryset http://stackoverflow.com/questions/1058135/django-convert-a-list-back-to-a-queryset wise. What you can do Describe how the reputation field is calculated it's probably possible to order the data in the database somehow...
How to efficiently calculate a running standard deviation? http://stackoverflow.com/questions/1174984/how-to-efficiently-calculate-a-running-standard-deviation deviation I loop through again now that I have the mean calculated. I would like to avoid going through the array twice once for..
Python random lines from subfolders http://stackoverflow.com/questions/12128948/python-random-lines-from-subfolders if your files ever do change as the indexes have to be re calculated. The file_indices will help you with that task but that is outside..
Python: Random is barely random at all? http://stackoverflow.com/questions/2145510/python-random-is-barely-random-at-all log10 numerator log10 denominator # We've just calculated the log of the probability that NO # two matching pairs occur..
Solving embarassingly parallel problems using Python multiprocessing http://stackoverflow.com/questions/2359253/solving-embarassingly-parallel-problems-using-python-multiprocessing based of the original row as the first element and the calculated result from that row as the second element for result_row in.. could wait until all input was parsed and all results were calculated e.g. because we know all the input and output will fit in system..
Variables viewer on Eclipse debugging truncates the string values [duplicate] http://stackoverflow.com/questions/3199611/variables-viewer-on-eclipse-debugging-truncates-the-string-values the truncation of string output. Keep in mind that the calculated length includes the type identifier at the beginning so str..
Algorithm to find which number in a list sum up to a certain number http://stackoverflow.com/questions/3420937/algorithm-to-find-which-number-in-a-list-sum-up-to-a-certain-number 0 else 0 if i S not in memo # Check if value has not been calculated. count f v i 1 S memo count f v i 1 S v i memo memo i S count.. 1 S memo count f v i 1 S v i memo memo i S count # Memoize calculated result. return memo i S # Return memoized value. v 1 2 3 10..
Python - anyone have a memoizing decorator that can handle unhashable arguments? http://stackoverflow.com/questions/4669391/python-anyone-have-a-memoizing-decorator-that-can-handle-unhashable-arguments the level of dependencies multiple times e.g. 'a' is calculated 8 times I think in the example above . Thanks Mike python memoization..
Python: List vs Dict for look up table http://stackoverflow.com/questions/513882/python-list-vs-dict-for-look-up-table Problem 92 . I'm making a look up table to see if a value calculated has all ready been calculated. EDIT 2 Efficiency for look up... up table to see if a value calculated has all ready been calculated. EDIT 2 Efficiency for look up. EDIT 3 There are no values assosiated..
Python 2.x gotcha's and landmines http://stackoverflow.com/questions/530530/python-2-x-gotchas-and-landmines this question Expressions in default arguments are calculated when the function is defined not when it 䏭 called. Example consider..
Generating unique, ordered Pythagorean triplets http://stackoverflow.com/questions/575117/generating-unique-ordered-pythagorean-triplets new Triple x y z y return result Note that x x is calculated in the outer loop although I didn't bother to cache z z similar..
Analyze audio using Fast Fourier Transform http://stackoverflow.com/questions/604453/analyze-audio-using-fast-fourier-transform a b j then its magnitude is sqrt a^2 b^2 . Once you have calculated the magnitude of each FFT coefficient you need to figure out..
http://stackoverflow.com/questions/6352740/matplotlib-label-each-bin sure how Matplotlib calculates this but I assume it's auto calculated from the range data Is there some way I can increase the resolution..
Why is early return slower than else? http://stackoverflow.com/questions/8271139/why-is-early-return-slower-than-else used in the past in which case we go try the next value calculated as above. The slot is full but the full hash value stored in..
Converting datetime.date to UTC timestamp in Python http://stackoverflow.com/questions/8777753/converting-datetime-date-to-utc-timestamp-in-python corresponding to a datetime instance dt can be easily calculated as follows. For a naive dt timestamp dt datetime 1970 1 1 timedelta..
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