#Slice(start, end)
from pandas import read_csv
df = read_csv(
'D:\\PDA\\4.6\\data.csv'
)
#修改电话号码的格式
df['tel'] = df['tel'].astype(str)
#运营商抽取
bands = df['tel'].str.slice(0, 3)
#地区
areas = df['tel'].str.slice(3, 7)
#号码段
nums = df['tel'].str.slice(7, 11)
#赋值回去
df['bands'] = bands
df['areas'] = areas
df['nums'] = nums
