Python Programming Archives - Page 3 of 892

How to properly use coverage.py in Python?

January 15, 2021 Simon Abital

Question or problem about Python programming: I’ve just started using Coverage.py module and so decided to make a simple test to check how it works.

Python datetime strptime() and strftime(): how to preserve the timezone information

January 15, 2021 Oceane Wilson

Question or problem about Python programming: See the following code:

Microsoft Visual C++ Compiler for Python 3.4

January 15, 2021 James Cameron

Question or problem about Python programming: I know that there is a “Microsoft Visual C++ Compiler for Python 2.7” but is there, currently or planned, a Microsoft Visual C++ Compiler for Python 3.4 or eve Microsoft Visual C++ Compiler for Python 3.x for that matter? It would be supremely beneficial if I didn’t have to […]

pandas equivalent of np.where

January 15, 2021 Andrew Rocky

Question or problem about Python programming: np.where has the semantics of a vectorized if/else (similar to Apache Spark’s when/otherwise DataFrame method). I know that I can use np.where on pandas Series, but pandas often defines its own API to use instead of raw numpy functions, which is usually more convenient with pd.Series/pd.DataFrame.

Celery task that runs more tasks

January 15, 2021 Ollie MC

Question or problem about Python programming: I am using celerybeat to kick off a primary task that kicks of a number of secondary tasks. I have both tasks written already.

Mako or Jinja2?

January 15, 2021 Bell Jacquise

Question or problem about Python programming: I didn’t find a good comparison of jinja2 and Mako. What would you use for what tasks ? I personnaly was satisfied by mako (in a pylons web app context) but am curious to know if jinja2 has some nice features/improvements that mako doesn’t ? -or maybe downsides ?- […]

Python is a powerful general-purpose programming language.

How to write custom python logging handler?

January 15, 2021 Ollie MC

Question or problem about Python programming: How to write custom console log function to output only on the console window log messages on a single line (not append) until the first regular log record.

How to display progress of scipy.optimize function?

January 15, 2021 Bell Jacquise

Question or problem about Python programming: I use scipy.optimize to minimize a function of 12 arguments.

Equivalent of Python’s dir in Javascript

January 15, 2021 Jeffrey Schneider

Question or problem about Python programming: when I write Python code from the interpreter I can type dir() to have a list of names defined in the current scope. How can achieve to have the same information, programmatically, when I develop Javascript code from a browser using an interactive console like firebug, chrome console, etc?

scikit-learn cross validation, negative values with mean squared error

January 15, 2021 James Cameron

Question or problem about Python programming: When I use the following code with Data matrix X of size (952,144) and output vector y of size (952), mean_squared_error metric returns negative values, which is unexpected. Do you have any idea?