python实现将txt文件格式转换为arff格式

将文件读取出来的时候默认都是字符型的，所以有转换出来有点问题，但是还是可以用的。

文件要求第一行是你对应的属性名，之后是数字。

import sys
import re

relationname = ""
filename = ""

if (len(sys.argv)<2):
print("Usage:\npython arff.py MyRelationName filename.txt")
else:
relationname = sys.argv[1]
filename = sys.argv[2]

class Arff:
def __init__(self, r, f):
self.relationname = r if r is not "" else "MachineLearning"
f = f if f is not "" else "MMG_data.txt"
self.file1 = open(f, 'r')
self.data = []
self.names = []
self.parseData()
self.writeToFile()

def parseData(self):
firstLine = True
for line in self.file1.readlines():
if not firstLine:
try:
line = line.replace("\n", "")
words = line.split(" ")
except ValueError:
print("cant parse file!!")
self.data.append(words)
else:
firstLine = False
line = line.replace("\n", "")
words = line.split(" ")
self.names = words

def getType(self, value):
v = ""
if(type(value) == type(1)):
v = "numeric"
elif(type(value) == type(1.0)):
v = "numeric"
elif(re.match("[0-9]{4}\-[0-9]{2}\-[0-9]{2}\s[0-9]{2}\:[0-9]{2}\:[0-9]{2}", value)):
v = "date " + "yyyy-MM-dd HH:mm:ss"
elif(type(value) == type("string")):
v = "string"
elif(v == ""):
print("Data type "+value+" not supported yet.")
return v

def writeToFile(self):
values = self.data[0]
file2 = open("Dexhunter_test_result.arff", 'w+' )

self.relationname+="\n"

relationString = '@RELATION ' + self.relationname
file2.write(''+relationString+'')

for i in range(len(self.names)):
str2 = "@ATTRIBUTE " + self.names[i] + " " + self.getType( values[i] ) + "\n"
file2.write(''+str2+'')
file2.write('''@DATA\n''')

for line in self.data:
try:
file2.write(",".join(line)+"\n")
except UnicodeEncodeError:
print("cant write Data to file!!")

Arff(relationname, filename)