import datetime
import os
import pandas as pd
 
 
def load_status(filename):
    if os.path.exists(filename):
        return pd.read_csv(filename)
    else:
        return pd.DataFrame(columns=['time', 'signal'])
 
 
def save_status(filename, status):
    status.to_csv(filename, header=True, index=False)
 
 
def main():
    filename = 'status.csv'
 
    # ステータスの読み込み
    status = load_status(filename)
 
    # 前回のステータス
    signal = None
    if len(status) > 0:
        signal = status['signal'].iloc[-1]
        print('前回のシグナル:' + signal)
 
    # なんか処理
    print('過去のステータスの表示でも・・・')
    print(status)
 
    # シグナル変化
    now = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')  # 現在時刻
    signal = 'buy'
    record = pd.Series([now, signal], index=['time', 'signal'])
    status = status.append(record, ignore_index=True)
 
    # 終了時に書き出す
    save_status(filename, status)
 
 
if __name__ == '__main__':
    main()
 

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