Is there a way to get the golden ratio, phi, in the standard python module? I know of e and pi in the math module, but I might have missed phi defined somewhere. Answer scipy.constants defines the golden ratio as scipy.constants.golden. It is nowhere defined in the standard library, presumably because it is e…
Tag: python
PIL and pygame.image
I had opened an image using PIL, as Draw some text on it, as and then saved it as to open it using pygame.image I just want to do it without saving.. Can that be possible? It is taking a lot of time to save and then load(0.12 sec Yes, that is more as I have multiple images which require
Walmart Price Scraping with Python 3
I am very new to this concept, but I am trying to learn how to use python to manipulate HTML data. I wrote a python (ver. 3.4.1) script which fetches the URL and returns some information, which I parse using BeautifulSoup (ver. 4). In this example, I am attempting to obtain the price of the Xbox One. I chose …
How to return objects from methods in Python?
Can anyone describe how to return objects from a method on which further methods and attributes can be accessed? Example: Answer Create an Order class with appropriate methods and properties. After that, you’ll be able to return an instance of this class from PizzaHut.order() method. http://repl.it/WWB …
Open a url by clicking a data point in plotly?
I have successfully created plotly graphs from python, and gone as far as creating custom html tooltips for the datapoints. But I haven’t succeeded in adding functionality to open a link if someone clicks on a datapoint. What I would like is a separate tab to pop up showing more information linked to th…
PyQt4 QWizard: How to disable the back button on a single page?
I would like to disable the “Back” button on a QWizard page. My Class inherits from QWizard and from a generated file. It looks somehow like this: from PyQt4 import QtGui Here http://doc.qt.digia.com/3.3/qwizard.html#backButton I found the method setBackEnabled(). With self.setBackEnabled(page1, F…
Use backticks (`) or double quotes (“) with Python and SQLite
I saw a similar question on Stack Overflow pertaining to Android, but I was wondering whether I should use backticks (`) or double quotes (“) – using Python – to select table names or rowid or what have you. I tried single quotes – like this select ‘rowid’, * from ‘tb…
How to merge two dataframe in pandas to replace nan
I want to do this in pandas: I have 2 dataframes, A and B, I want to replace only NaN of A with B values. Answer The official way promoted exactly to do this is A.combine_first(B). Further information are in the official documentation. However, it gets outperformed massively with large databases from A.fillna…
How do I connect to Postgresql using SSL from SqlAchemy+pg8000?
Connecting to postgres via pg8000 from SqlAlchemy worked fine until I enabled SSL on postgres. Now it seems to fail with: Answer You need to add a connect_args dict:
Heroku: Run a Rails application with a Python script on the same instance
I have a Python script in the /app/bin directory of my Rails app that contains a requirements.txt file that includes all of the dependencies it relies on. How do I get it to run on the same Heroku instance that my Rails app currently runs on (my Rails app call the python script occasionally). Here’s wha…