python中導入日期時間csv

Question

初學者問題-我正在嘗試將CS​​V文件導入python，但是日期格式似乎有問題

path =".csv"
file = open(path, newline='')
reader = csv.reader(file)

header = next(reader) 

data = []
for row in reader:
    #row = [Date,Open,High,Low,Close,Adj Close,Volume]
    date = datetime.strptime(row[0], '%Y-%m-%d') 
    open_price = float(row[1]) 
    high = float(row[2])
    low = float(row[3])
    close = float(row[4])
    adj_close = float(row[5])
    volume = int(row[6])

    data.append([date, open_price, high, low, close, adj_close, volume])

print(data[0])

我收到的錯誤消息是

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-12-ace6c5a0e17d> in <module>
     11 for row in reader:
     12     #row = [Date,Open,High,Low,Close,Adj Close,Volume]
---> 13     date = datetime.strptime(row[0], '%Y-%m-%d')
     14     open_price = float(row[1]) # 'open' is built-in function in python
     15     high = float(row[2])

~/anaconda3/lib/python3.7/_strptime.py in _strptime_datetime(cls, data_string, format)
    575     """Return a class cls instance based on the input string and the
    576     format string."""
--> 577     tt, fraction, gmtoff_fraction = _strptime(data_string, format)
    578     tzname, gmtoff = tt[-2:]
    579     args = tt[:6] + (fraction,)

~/anaconda3/lib/python3.7/_strptime.py in _strptime(data_string, format)
    360     if len(data_string) != found.end():
    361         raise ValueError("unconverted data remains: %s" %
--> 362                           data_string[found.end():])
    363 
    364     iso_year = year = None

ValueError: unconverted data remains: ;1048.339966;1066.939941;1045.229980;1065.000000;1065.000000;1237600`enter code here`

ValueError：保留未轉換的數據

這是什么意思，如何實現？ 多謝。

Answer 1

看起來您的CSV實際上是使用分號而不是逗號作為分隔符。 這導致第一個“單元格”包含該行中所有單元格的數據，日期時間解析器被阻塞了。

您可以通過更改第3行的內容來解決將csv閱讀器更改為使用分號的問題：

reader = csv.reader(file)

至

reader = csv.reader(file, delimiter=';')