您能否幫助我修改此代碼以將數字寫入到cvs文件中的2個小數位？在cvs文件中將字符串寫入2個小數位
outfile = open("numbers.csv", "a")
outfile.write(str(datetime.strftime(datetime.now(), '%Y-%m-%d %H:%M:%S')) + "," + str(number_1) + "," + str(number_2) + "," + str(number_3)+ "," + str(number_4) + "," + str(number_5) + "," + str(number_6) + "," + str(number_7) + "," + str(number_8) + "," + str(number_9) +"\n")
非常感謝。
在寫入csv之前使用round()函數，圓函數的第二個參數是要舍入爲的小數位數。
示例 -
>>> number_1 = 1.4412324
>>> number_2 = 1.54988312
>>> round(number_1,2)
1.44
>>> round(number_2,2)
1.55
在你的情況 -
outfile = open("numbers.csv", "a")
outfile.write(str(datetime.strftime(datetime.now(), '%Y-%m-%d %H:%M:%S')) + "," + str(round(number_1, 2)) + "," + str(round(number_2, 2)) + "," + str(round(number_3, 2))+ "," + str(round(number_4, 2)) + "," + str(round(number_5, 2)) + "," + str(round(number_6, 2)) + "," + str(round(number_7, 2)) + "," + str(round(number_8, 2)) + "," + str(round(number_9, 2)) +"\n")
您可以考慮使用format
"{:.2f}".format(24.45679)
給你'24.46'。
你的意思是['round（）']（https://docs.python.org/3/library/functions.html#round）？ – TigerhawkT3
我還建議用一個基本的'list'替換所有'number_1'，'number_2'等。 – TigerhawkT3