创建数据和行append数据
>>> df = pd.DataFrame([['AA', 1.00], ['Ks', 2.00]], columns=['name', 'age'])
>>> df
name age
0 AA 1.0
1 Ks 2.0
>>> df.append(pd.Series({'name': 'hha', 'age': 12}), ignore_index = True)
name age
0 AA 1.0
1 Ks 2.0
2 hha 12.0