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python儲存檔案的幾種方法

1>儲存為二進位制檔案,pkl格式

import pickle
pickle.dump(data,open('file_path','wb'))  #字尾.pkl可加可不加
若檔案過大
pickle.dump(data,open('file_path', 'wb'),protocol=4)
讀取該檔案:
data= pickle.load(open('file_path','rb'))

2>儲存為二進位制檔案,npz格式
import numpy as np
np.savez('file_path/file_name.npz', data1=X,data2=y)
讀取該檔案:
with np.load('file_path/file_name.npz') as data:
    X = data['data1']
    y= data['data2']

3>DataFrame檔案儲存為.csv

dataframe_file.to_csv("file_path/file_name.csv", index=False) 
讀取該檔案:
import pandas as pd
df = pd.read_csv('file_path/file_name.csv')