Date,High,Low,Open,Close,Volume,Adj Close
1980-12-12,0.515625,0.5133928656578064,0.5133928656578064,0.5133928656578064,117258400.0,0.02300705946981907
1980-12-15,0.4888392984867096,0.4866071343421936,0.4888392984867096,0.4866071343421936,43971200.0,0.02180669829249382
1980-12-16,0.453125,0.4508928656578064,0.453125,0.4508928656578064,26432000.0,0.02020619809627533
我还有一个
Pandas DataFrame
它有完全相同的值,但也有新的条目。我的目标是只将新值追加到CSV文件中。
我试过这样做,但不幸的是,这不仅附加了新条目,还附加了旧条目:
df.to_csv('{}/{}'.format(FOLDER, 'AAPL.CSV'), mode='a', header=False)
