python dataframe slice

import pandas as pd

import numpy as np

d=np.array(range(10)).reshape(2,5)

data=pd.DataFrame(d)

data.columns=['a','b']

data['test']=['m1901\t','m1902\t','m1903\t','m1904\t','m1905\t']

data['test']=data['test'].str.slice(1,5)#从第二个开始截取中间4位。