pandas.DataFrame.append

来源：互联网发布：传奇物品数据库详解编辑：程序博客网时间：2024/06/01 09:28

DataFrame.append(other, ignore_index=False, verify_integrity=False)

DataFrame连接字典

In [1]: import pandas as pd   ...: df=pd.DataFrame({   ...:     "name":[],   ...:     "age":[]   ...:         })   ...: student={   ...:         "name":"wang",   ...:         "age":1   ...:         }   ...: df.append(pd.DataFrame(student))ValueError: If using all scalar values, you must pass an index

提示这样的错误是因为字典在转为DataFrame的时候没有给出索引,应该在转换的时候给出索引

给字典转换的数据框添加索引

In [1]: import pandas as pd   ...: df=pd.DataFrame({   ...:     "name":[],   ...:     "age":[]   ...:         })   ...: student={   ...:         "name":"wang",   ...:         "age":1   ...:         }   ...: df.append(pd.DataFrame(student,index=[1]))#注意这里index传入的是列表Out[1]:    age  name1  1.0  wang

这届添加字典,忽略掉索引

In [1]: import pandas as pd   ...: df=pd.DataFrame({   ...:     "name":[],   ...:     "age":[]   ...:         })   ...: student={   ...:         "name":"wang",   ...:         "age":1   ...:         }   ...: df.append(student,ignore_index=True)Out[1]:    age  name0  1.0  wang

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