human
how to do a left,right and mid of a string in a pandas dataframe
assistant
Here is some code to get the middle two characters of a string 'state' in a pandas dataframe `df`

df['state'].apply(lambda x: x[len(x) / 2 - 1:len(x) / 2 + 1])

#Warning: this code generation is experimental. Please inspect the code for any bugs before executing.