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python Programming Glossary: calculateHow to remove convexity defects in a Sudoku square? http://stackoverflow.com/questions/10196198/how-to-remove-convexity-defects-in-a-sudoku-square each pair of vertical horizontal grid lines dilate them calculate the pixel by pixel intersection and calculate the center of.. dilate them calculate the pixel by pixel intersection and calculate the center of the result. These points are the grid line intersections..
How to efficiently calculate a running standard deviation? http://stackoverflow.com/questions/1174984/how-to-efficiently-calculate-a-running-standard-deviation to efficiently calculate a running standard deviation I have an array of lists of numbers.. 0.00 0.01 0.05 0.03 What I would like to do is efficiently calculate the mean and standard deviation at each index of a list across.. deviation I loop through again now that I have the mean calculated. I would like to avoid going through the array twice once for..
how can I force division to be floating point in Python? http://stackoverflow.com/questions/1267869/how-can-i-force-division-to-be-floating-point-in-python ratio in floating point. I know that a b and I want to calculate a b so if I use integer division I'll always get 0 with a remainder..
What is the best way to get all the divisors of a number? http://stackoverflow.com/questions/171765/what-is-the-best-way-to-get-all-the-divisors-of-a-number the number of divisor of a given number doesn't need to calculate all the divisors. It's a different problem if you think it's..
How can I quantify difference between two images? http://stackoverflow.com/questions/189943/how-can-i-quantify-difference-between-two-images idea Load both images as arrays scipy.misc.imread and calculate an element wise difference. Calculate the norm of the difference... If yes you can apply edge detection algorithm first e.g. calculate gradient with Sobel or Prewitt transform apply some threshold.. disabling it img1 normalize img1 img2 normalize img2 # calculate the difference and its norms diff img1 img2 # elementwise for..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained a second time since generators can only be used once they calculate 0 then forget about it and calculate 1 and end calculating 4.. be used once they calculate 0 then forget about it and calculate 1 and end calculating 4 one by one. Yield Yield is a keyword..
Inverse Distance Weighted (IDW) Interpolation with Python http://stackoverflow.com/questions/3104781/inverse-distance-weighted-idw-interpolation-with-python with Python The Question What is the best way to calculate inverse distance weighted IDW interpolation in Python for point.. it doesn't look like there is a straight forward way to calculate IDW. I'm thinking of rolling my own implementation possibly.. the scipy functionality to locate the closest points and calculate distances. Am I missing something obvious Is there a python..
Using strides for an efficient moving average filter http://stackoverflow.com/questions/4936620/using-strides-for-an-efficient-moving-average-filter on a single axis of an ndarray. It makes it really easy to calculate things like a moving standard deviation etc with very little.. function to the last axis repeatedly to effectively calculate things in a moving window. However because we're storing temporary..
How can you dynamically create variables in Python via a while loop? http://stackoverflow.com/questions/5036700/how-can-you-dynamically-create-variables-in-python-via-a-while-loop to each. a k 0 while k 10 dynamically create key key ... calculate value value ... a key value k 1 There are also some interesting..
Python Code Obfuscation [closed] http://stackoverflow.com/questions/576963/python-code-obfuscation
How to read large file, line by line in python http://stackoverflow.com/questions/8009882/how-to-read-large-file-line-by-line-in-python active Any suggestions TIA Chakri EDIT The purpose is to calculate pair wise string similarity. Meaning for each line in file I.. string similarity. Meaning for each line in file I want to calculate levenshtein distance with every other line python share improve..
Fast comparison between two Python dictionary http://stackoverflow.com/questions/1165352/fast-comparison-between-two-python-dictionary key value pairs are changed. class DictDiffer object Calculate the difference between two dictionaries as 1 items added 2 items..
Calculating a SHA hash with a string + secret key in python http://stackoverflow.com/questions/1306550/calculating-a-sha-hash-with-a-string-secret-key-in-python ushing Python. The step I get hung up on is this one Calculate an RFC 2104 compliant HMAC with the SHA256 hash algorithm using..
Sanitising user input using Python http://stackoverflow.com/questions/16861/sanitising-user-input-using-python vbs js if attr in urlAttrs val urljoin base_url val # Calculate the absolute url tag.attrs.append attr val return soup.renderContents..
How can I quantify difference between two images? http://stackoverflow.com/questions/189943/how-can-i-quantify-difference-between-two-images and calculate an element wise difference. Calculate the norm of the difference. However there are some decisions..
counting combinations and permutations efficiently http://stackoverflow.com/questions/2096573/counting-combinations-and-permutations-efficiently prod 1 for n in iterable prod n return prod def npr n r Calculate the number of ordered permutations of r items taken from a population.. assert 0 r n return product range n r 1 n 1 def ncr n r Calculate the number of unordered combinations of r items taken from a..
Solving embarassingly parallel problems using Python multiprocessing http://stackoverflow.com/questions/2359253/solving-embarassingly-parallel-problems-using-python-multiprocessing the input file into raw data lists iterables of integers Calculate the sums of the data in parallel Output the sums Below is traditional..
Search for string allowing for one mismatch in any location of the string http://stackoverflow.com/questions/2420412/search-for-string-allowing-for-one-mismatch-in-any-location-of-the-string wstr else wstr 0 wstr num 1 return wstr def Ham_dist s1 s2 Calculate Hamming distance between 2 sequences. assert len s1 len s2 return..
Python lazy property decorator http://stackoverflow.com/questions/3012421/python-lazy-property-decorator self._b None @property def a self if self._a is None # Calculate the attribute now self._a 7 return self._a @property def b self..
Non biased return a list of n random positive numbers (>=0) so that their sum == total_sum http://stackoverflow.com/questions/3959021/non-biased-return-a-list-of-n-random-positive-numbers-0-so-that-their-sum uniformly distributed between b sqrt 2 3 and b sqrt 3 . Calculate the vector U' 1 sqrt 3 u v Compute U U' W. If any of U's components.. the range 0 b reject this value and go back to step 1. Calculate V U S. The solution is similar for higher dimensions uniformly.. u N 1 each uniformly distributed between b k N and b k N . Calculate the vector U' 1 N u 1 u 2 ... u N 1 Compute U U' W. there are..
Calculate next scheduled time based on cron spec http://stackoverflow.com/questions/4610904/calculate-next-scheduled-time-based-on-cron-spec next scheduled time based on cron spec What's an efficient..
Haversine Formula in Python (Bearing and Distance between two GPS points) http://stackoverflow.com/questions/4913349/haversine-formula-in-python-bearing-and-distance-between-two-gps-points cos sin asin sqrt def haversine lon1 lat1 lon2 lat2 Calculate the great circle distance between two points on the earth specified..
Efficient Numpy 2D array construction from 1D array http://stackoverflow.com/questions/4923617/efficient-numpy-2d-array-construction-from-1d-array x 3 array 0 1 2 1 2 3 2 3 4 5 6 7 6 7 8 7 8 9 Calculate rolling mean of last dimension np.mean rolling_window x 3 1..
How to include external Python code to use in other files? http://stackoverflow.com/questions/714881/how-to-include-external-python-code-to-use-in-other-files any prefix i.e. file prefix So if I have Math.py def Calculate num How do I call it like this Tool.py using Math.py for i in.. I call it like this Tool.py using Math.py for i in range 5 Calculate i python share improve this question You will need to import.. like this import Math If you don't want to prefix your Calculate function with the module name then do this from Math import..
http://stackoverflow.com/questions/7343697/linear-interpolation-python would be x1 x2 2.5 3.4 and the indices would be i1 1 i2 2 Calculate the slope on this interval by y_values i2 y_values i2 x_values..
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