TypeError: ‘set’ object does not support indexing
Try square brackets: i.e.: use an list instead of a set
python
Moving Average Pandas
The rolling mean returns a Series you only have to add it as a new column of your DataFrame (MA) as described below. For information, the rolling_mean function has been deprecated in pandas newer versions. I have used the new method in my example, see below a quote from the pandas documentation. Warning Prior to version 0.18.0, pd.rolling_*, pd.expanding_*, and pd.ewm* were module level functions and are … Read more
pip3 error – ‘_NamespacePath’ object has no attribute ‘sort’
I met the same issue with python 3.5.2 and pip3 (9.0.1). And I fixed it by following this workaround: https://github.com/pypa/setuptools/issues/885#issuecomment-307696027 More specifically, I edited line #2121~2122 of this file: “sudo vim /usr/local/lib/python3.5/dist-packages/pip/_vendor/pkg_resources/__init__.py”
Building multi-regression model throws error: `Pandas data cast to numpy dtype of object. Check input data with np.asarray(data).`
If X is your dataframe, try using the .astype method to convert to float when running the model:
How to do a Sigma in python 3
A sigma (∑) is a Summation operator. It evaluates a certain expression many times, with slightly different variables, and returns the sum of all those expressions. For example, in the Ballistic coefficient formula The Python implementation would look something like this: You may want to look at the enumerate function, and beware precision problems.
RSA encryption and decryption in Python
In order to make it work you need to convert key from str to tuple before decryption(ast.literal_eval function). Here is fixed code:
Numpy, multiply array with scalar
You can multiply numpy arrays by scalars and it just works. This is also a very fast and efficient operation. With your example:
How does ajax work with python?
Usually, ajax handler on your server should return XML or JSON (I think JSON is better) with the data it needs. So, after getting info from the handler, dump(cast) it into a JSON object and return to client. On client, JavaScript receives this JSON, and after that should dynamically create html elements and insert them … Read more
Is there a math nCr function in python?
The following program calculates nCr in an efficient manner (compared to calculating factorials etc.) As of Python 3.8, binomial coefficients are available in the standard library as math.comb:
ImportError: No module named ‘django.core.urlresolvers’
Django 2.0 removes the django.core.urlresolvers module, which was moved to django.urls in version 1.10. You should change any import to use django.urls instead, like this: Note that Django 2.0 removes some features that previously were in django.core.urlresolvers, so you might have to make some more changes before your code works. See the features deprecated in 1.9 for details on those additional changes.