The Adventures of Dash Daring in Code & Music & Business
After laying the foundation in Introduction to matplotlib and Introduction to matplotlib – Part 2 I want to show you another important chart
A bar chart is useful to show total values over time e.g. the revenue of a company.
years = (2017, 2018, 2019)
revenue = (5000, 7000, 9000)
plt.bar(years, revenue, width=0.35)
plt.xticks(years)
plt.title("Revenue over years")
# import and instantiate model from sklearn.linear_model import LinearRegression model = LinearRegression() #prepare test data features_train = df_train.loc[:, 'feature_name'] target_train = df_train.loc[:, 'target_name'] #fit (train) model and print coefficient and intercept model.fit(features_train , target_train ) print(model.coef_) print(model.intercept_) # calculate model quality from sklearn.metrics import mean_squared_error from sklearn.metrics import r2_score target_prediction = model.predict(features_train) print(mean_squared_error(target_train , target_prediction)) print(r2_score(target_train , target_prediction)) # test predictions features_test = df_train.loc[:, 'feature_name'] target_test = df_train.loc[:, 'target_name'] target_prediction_test = model.predict(features_test) print(mean_squared_error(target_test, target_prediction_test )) print(r2_score(target_test, target_prediction_test ))
At PyConDE Berlin 2019 Florian Bruhin gave a really nice session about testing with pytest, which I try to recap here.
If You want to work with pytest you can install it via:
pip install pytest
When you know basic python unittest fixtures, good news ahead:
pytest is compatible and will run your old unittest classes as well, but pytest doesn’t need to have a testclass derived from some subclass.
It is sufficient to have a single python file which name starts with test_ containing a function which name also starts with test_ Continue reading “pytest Tutorial – Part 1”
Every day I see new proof, new studies, new measurements indicating that we’re in full blown climate disaster in the making and don’t know what I should do. How can I affect change at scale? Doesn’t feel like sorting my trash will be enough…
— Siim Teller (@teller) June 13, 2019
It’s tough! Believing in the 1% improvement thing / atomic habits I would start small but consistent. And also believing in the Management 3.0 experimenting culture I would run experiments. Some ideas: Continue reading “Individual sustainable lifestyle tips”
Se_en represents a pattern with a wildcard character. The _ means you can substitute any individual character here without breaking the pattern. The names Seven and Se7en both match this pattern.
The percentage sign % is another wildcard character that can be used with LIKE.
In 15 Steps for successful Bootstrapping – Part 1 and 15 Steps for successful Bootstrapping – Part 2 I wrote about bootstrapping. This is the next part of this series.
USP means “unique selling proposition”, which makes it even better than the German word USP. It’s all about “selling”, so selling. That means your unique selling point must also make the customer buy something. Continue reading “15 Steps for successful Bootstrapping – Part 3”
When I graduated from university and had my first job as a software engineer at Harman Becker Automotive Systems GmbH I should do the parental leave cover for a colleague. He showed me his project, gave me some info e.g. contact person and went off to Canada.
Literally on the second day he was away, the phone started to ring. The OEM had a A++ blocker issue found in the software and everything pointed to the component I was now maintaining. Continue reading “Software Testing Concepts – Part 1”
lernOS is an operating system for lifelong learning and learning organizations. Continue reading “lernOS Overview”
Stackoverflowing around I found this nice package
https://github.com/wolever/parameterized
Parameterized testing in Python sucks.
parameterizedfixes that. For everything. Parameterized testing for nose, parameterized testing for py.test, parameterized testing for unittest.
Reading this description I had very high expectations 🙂
so let’s see if the package can hold up to it. Continue reading “Python Package parameterized”
I’ve always wanted to go to a conference and with PyConDE I’ve found one that suited me well: The price point of 300 bucks for 3 days of conference, 2 days of workshops and the opportunity to go to Berlin and visit my friend Thomas was fascinating! Continue reading “PyConDE Berlin 2019”
