Advanced regular expression: [Pp]ython freq table

Q&A
, ,
#1

Screen Link: Learn data science with Python and R projects

My Code: 

pattern = r"[Pp]ython ([\d.]+)"
py_versions_freq = titles.str.extract(pattern, expand=False).value_counts()
print(py_versions_freq)

I expected the freq table will show Python/python plus the digital character. However, it only shows the digital character in freq table. Why?

#2

That’s what str.extract() does. It extracts the capture group in the pattern, which is what’s enclosed in the parenthesis.

If you modified your pattern to r"([Pp]ython [\d.]+)", then you would see Python/python as well.

I would recommend checking out the documentation for extract()