python下DataFrame, Series, ndarray, list, dict, tuple的相互转换

import numpy as np

import pandas as pd

########### Series ###########

Series <--> DataFrame

*dataframe* = pd.DataFrame({"XXX1":*series1*,"XXX2":*series2*})

*series* = *dataframe*[0]  #无标签时

*series* = *dataframe*["XXX"]  #有标签时

Serise <--> ndarray

*series* = pd.Series(*ndarray*) #这里的ndarray是1维的

*ndarray* = np.array(*series*)

*ndarray* = *series*.values

Series <--> list

*series* = pd.Series(*list*)

*list* = *series*.tolist()

*list* = list(*series*)

Series <--> dict

*series* = pd.Series(*dict*)

*dict* = *series*.to_dict()

########### DataFrame ###########

DataFrame <--> ndarray

*ndarray* = *dataframe*.values

*dataframe* = pd.DataFrame(*ndarray*)

DataFrame <--> list

*list* = *dataframe*.values.tolist()

*dataframe* = pd.DataFrame(*list*)

DataFrame <--> dict

*dataframe* = pd.DataFrame.from_dict({0:*dict1*, 1:*dict2*})

*dataframe* = pd.DataFrame(*dict*)

*dict* = *dataframe*.to_dict()

########### 其它 list ###########

dict --> list

*list* = *dict*.values() # list of values

*list* = *dict*.keys() # list of keys

*list* = list(*dict*) # list of keys

ndarray <--> list

*list* = *ndarray*.tolist()

*ndarray* = np.array(*list*)

tuple <--> list

*list* = list(*tuple*)

*tuple* = tuple(*list*)

Index --> list

*dataframe*.columns.tolist()

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作者：lambsnow 

来源：CSDN 

原文：https://blog.csdn.net/lambsnow/article/details/78517340 

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