After remove captcha’s background. The image remain digits and noise. Noise line is all in one color : RGB(127,127,127) And then using morphology method. Some part of digit will be remove. How to use morphologyEx() remove only color in RGB(127,127,127) ? Answer In order to eliminate color within a parti…
How to test a Django on_commit hook without clearing the database?
The on_commit function has been added to Django 1.9 to be able to trigger an action (e.g. a Celery task) after the current transaction has committed. They mention later in the docs that one should use TransactionTestCase to test features that rely on that function. However, unlike TestCase (which uses transac…
Use .corr to get the correlation between two columns
I have the following pandas dataframe Top15: I create a column that estimates the number of citable documents per person: I want to know the correlation between the number of citable documents per capita and the energy supply per capita. So I use the .corr() method (Pearson’s correlation): I want to ret…
doctest doesn’t test classes methods in a module
I can’t manage to have doctest test my modules classes methods. My module looks like that: A.py contains: (so the tests should fail) __init__.py contains And then I run Why doesn’t doctest test A.method ? Answer I found out why. Why it doesn’t work doctest tries to detect which tests donR…
Download pdf in memory python
I want to open a pdf in my Python program. So far that works. Right now I open the pdf from my local disk, but I want it to fetch the pdf from the internet, instead of opening it from my local drive. Note that I don’t wish to save the existing_pdf, once I fetched it from the internet I
Python & MS Word: Convert .doc to .docx?
I found several questions that were similar to mine, but none of the answers came close to what I need. Specifications: I’m working with Python 3 and do not have MS Word. My programming machine is running OS X and cloud machine is linux/ubuntu too. I’m using python-docx to extract values from a .d…
Python/Pandas: If Column has multiple values, convert to single row with multiples values in list
In my DataFrame, I have many instances of same AutoNumber having different KeyValue_String. I would like to convert these instances to a single row where the KeyValue_String is a list comprised of the multiple unique values. The desired output would look like this, except I want to keep all of the other colum…
Converting to unix timestamp Python
I am trying to convert a datestamp of now into Unix TimeStamp, however the code below seems to be hit but then just jumps to the end of my app, as in seems to not like the time.mktime part. Answer Change newDate = time.mktime(datetime.strptime(toDayDate, “%Y-%m-%d %H:%M:%S”).timetuple()) to newDat…
BeautifulSoup find_all limited to 50 results?
I’m trying to get the results from a page using BeautifulSoup: I read this previous solution: Beautiful Soup findAll doesn’t find them all and I tried html.parser, lxml and html5lib, but none of them return more than 50 results. Any suggestions? Answer Try using css-selector query.
What does .view() do in PyTorch?
What does .view() do to a tensor x? What do negative values mean? Answer view() reshapes the tensor without copying memory, similar to numpy’s reshape(). Given a tensor a with 16 elements: To reshape this tensor to make it a 4 x 4 tensor, use: Now a will be a 4 x 4 tensor. Note that after the reshape th…