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Monthly Archives: June 2014
Pandas : how to compare dataframe with None
While comparing a pandas dataframe with None, import pandas as pd df = pd.DataFrame() # Note that the dataframe is empty but it does not matter for this example. if df == None: pass # do nothing else: df.describe()import pandas … Continue reading
pygame installation not working due to “linux/videodev.h: No such file or directory” error
I wanted to install the python package called pygame. I encountered quite a few issues before being able to install it. I’m reporting here some of the solutions. Before starting, keep in mind that you can install pygame using apt-get … Continue reading
perl: define a module to be called in another script
First, define a module. The module must be in a path reachable by perl (e.g., local directory). Then, to make a script a valid package, you need to proceed as follows: Rename the perl script with the extension .pm It … Continue reading
sed: how to add text at the end of the file
Use the $a syntax and sed: sed -i ‘$a some text’ filenamesed -i ‘$a some text’ filename -i parameter means in place. To test without changing the original file, remove the -i option. The results will be print on the … Continue reading
