genfromtxt返回NaN的行

Question

我想讀與numpy的一個CSV文件，我有以下代碼

from numpy import genfromtxt 
data = genfromtxt(open('errerr.csv', "r"), names=True, delimiter=',') 

及以下出來

(nan, nan, nan, nan, nan, nan, nan), 
     (nan, nan, nan, nan, nan, nan, nan), 
     (nan, nan, nan, nan, nan, nan, nan)], 
     dtype=[('name', '<f8'), ('severity', '<f8'), ('Message', '<f8'), ('AppDomainName', '<f8'), ('ProcessName', '<f8'), ('clientid', '<f8'), ('type', '<f8')]) 

D型看起來不錯

和只是爲了證明我不會發瘋我試過這段代碼

import csv 
f = open('errors.csv', 'rt') 
reader = csv.reader(f) 
data = [] 
for r in reader: 
    data.append(r) 
f.close() 

偉大的工程，但即時通訊試圖找出什麼用genfromtxt

這裏的交易是從CSV

name,severity,Message,AppDomainName,ProcessName,clientid,type 
Strings strings,Error,") Thread Name: Extended Properties:",SunDSrvc.exe,C:\Program Files\\SunDSrvc.exe,5DAA9377 ,Client 
Strings strings,Error,") Thread Name: Extended Properties:",SunDSrvc.exe,C:\Program Files\\SunDSrvc.exe,5DAA9377 ,Client 
Strings strings,Error,") Thread Name: Extended Properties:",SunDSrvc.exe,C:\Program Files\\SunDSrvc.exe,5DAA9377 ,Client 

Answer 1

你dtype樣本不精。它爲每個字段指定了一個浮點數'<f8'。你想要字符串。嘗試dtype=None：

np.genfromtxt(txt,delimiter=',',names=True,dtype=None) 

主要生產：

array([ ('Strings strings', 'Error', '") Thread Name: Extended Properties:"', 'SunDSrvc.exe', 'C:\\Program Files\\SunDSrvc.exe', '5DAA9377 ', 'Client'), 
     ('Strings strings', 'Error', '") Thread Name: Extended Properties:"', 'SunDSrvc.exe', 'C:\\Program Files\\SunDSrvc.exe', '5DAA9377 ', 'Client'), 
     ('Strings strings', 'Error', '") Thread Name: Extended Properties:"', 'SunDSrvc.exe', 'C:\\Program Files\\SunDSrvc.exe', '5DAA9377 ', 'Client')], 
     dtype=[('name', 'S15'), ('severity', 'S5'), ('Message', 'S39'), ('AppDomainName', 'S12'), ('ProcessName', 'S29'), ('clientid', 'S9'), ('type', 'S6')]) 

（我已刪除多餘的東西，關於引號內的分隔符）