Pandas string slicing: Extracting substrings with .str.slice

Want to retrieve a slice from a string column in your Python Pandas data frame? Use .str.slice:

df['a'].str.slice(1, 10)    # or .str[1:10]
df['a'].str.slice(1, 10, 2) # or .str[1:10:2]
df['a'].str.slice(None, 10) # or .str[:10]
df['a'].str.slice(1, None)  # or .str[1:]