Python的日期錯誤

這裏是我的記錄文件的某些幾行Python的日期錯誤

10/21/2015 10:16:42 AM Following hmac:c35330404902c0b1bb5c6d0718407ea12b25a464433bd1e69152ccc0e0b89c9f with is already in database so dropping 
11/21/2015 10:16:42 AM The data for the duplicate Hmac is : HF 13300100012015-06-15 19:30:21+0000+ 12.61 0.010 1686.00 
07/21/2015 10:16:42 AM Following hmac:84d9cdb2145b7c3e0fa2d099070b7bd291c652f30ca25c69240e33ebbd2b8677 with is already in database so dropping 
07/21/2016 10:16:42 AM The data for the duplicate Hmac is : HF 13300100012015-06-15 20:16:18+0000+ 12.60 0.045 1686.00 
07/20/2016 10:16:42 AM Following hmac:a24d19d340651e694bff854ae7469dd779b60037228bf047d8f372dee4a731e0 with is already in database so dropping 
07/20/2016 10:16:42 AM The data for the duplicate Hmac is : HF 13300100012015-06-15 20:31:25+0000+ 12.62 0.045 1685.00 
07/20/2016 10:16:42 AM Following hmac:4e239a4b69108833e9cbc987db2014f9137679860df0ca8efdf7d09c4897d369 with is already in database so dropping 
07/19/2016 10:16:42 AM The data for the duplicate Hmac is : HF 13300100012015-06-15 20:46:27+0000+ 12.61 0.040 1685.00

我的目標是遍歷所有的線和線的特定字符返回計數包括HMAC。我已經計算了總數，但是我想返回最近一年的行數。試圖提取每一行的日期部分是給我一個錯誤

ValueError異常：未轉換的數據仍然是：

，我都試過，但無法找到解決方案。這裏是我的代碼從日期時間進口日期從日期時間導入時間從日期時間進口日期時間從日期時間進口timedelta 進口OS

def fileCount(fileName): 

    with open(fileName) as FileObj: 

     Count = 0 
     todayDate = date.today() 
     OneYear = str(todayDate - timedelta(days=365)) 
     OneMonth = str(todayDate - timedelta(days=30)) 
     ThreeMonths = str(todayDate - timedelta(days=90)) 

     while True: 

      line = FileObj.readline() 

      Lines = "-".join(line[:11].split("/")) 

      convertDate = datetime.strptime(Lines, '%m-%d-%Y') 

      print convertDate 

      if not line: 
       break 
      if "Following hmac" in line: 

       Count += 1 

     print "The total count is ", Count 

# Call The function 
def main(): 

    filePath = 'file.txt' 

    fileCount(filePath) 

if __name__ == "__main__": 

    main()

我想提取的日期使用它的日期算術運算這將允許我返回最近三個月，六個月和十二個月的計數。

來源

2016-11-04 user1895915

您的切片的停止索引包含未按您提供的日期格式計入的尾部空格。

你應該條空間：

>>> datetime.strptime(Lines.rstrip(), '%m-%d-%Y') 
datetime.datetime(2015, 10, 21, 0, 0)

或更改指數10而不是11排除完全的空間：

Lines = "-".join(line[:10].split("/"))

會計爲您的格式額外的空間另一個修復：

convertDate = datetime.strptime(Lines, '%m-%d-%Y ')

您可以處理其他錯誤，如空白行或通過使用try/except無日期字符串的一行：

lines = "-".join(line[:10].split("/")) 
try: 
    convert_date = datetime.strptime(lines, '%m-%d-%Y') 
    print convert_date 
except ValueError: 
    print 'This line has a problem:', lines

來源

2016-11-04 11:19:00

@摩西Koledoye。謝謝你快速的回覆。嘗試任何建議的解決方案都會給出另一個錯誤ValueError：時間數據''與格式'％m-％d-％Y'不匹配。我正在使用python 2.7 – user1895915

文件中有空行。你只應該解析包含日期字符串的行。將這行代碼封裝在「try/except ValueError」之外。請參閱答案中的更新。 –

Python的日期錯誤

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