arff文件和txt文件之间的转换_python

浏览数：32 / 时间：2015年06月08日

在github上，已经有前辈对这两种格式的文件间的转换提供了相应的python库，比如liac-arff: https://github.com/renatopp/liac-arff。但是当程序比较复杂时，再调用这么多外部文件，未免显得冗杂；而且这些arff库，在attribute和值数目不一致时，会报错。所以，在师兄的支持下，我参考overflow写了两个简单的转换函数。（用时5个多小时。。。以后要效率啊）

arff2txt():

将arff文件转换成txt格式：

import re
import sys

def arff2txt(filename):
    txtfile = open(‘./generatedtxt.txt‘,‘w‘)
    arr = []
    lines = []
    arff_file = open(filename)
    for line in arff_file:
        if not (line.startswith("@")):
            if not (line.startswith("%")):
                line = line.strip("\n")
                line = line.split(‘,‘)
                arr.append(line)

    del arr[0]
    for child in arr:
        del child[10]
        if child[9] == "True":
            child[9] = 1
        else:
            child[9] = 0
        lines.append(‘\t‘.join(map(str,child)))
    result = ‘\n‘.join(lines)
    print result

    txtfile.writelines(result)
    txtfile.close()

txt2arff():

将txt文件转换成arff()格式：

def txt2arff(filename, value):
    with open(‘./generatedarff.arff‘, ‘w‘) as fp:
        fp.write(‘‘‘@relation ExceptionRelation

@attribute ID string
@attribute Thrown numeric
@attribute SetLogicFlag numeric
@attribute Return numeric
@attribute LOC numeric
@attribute NumMethod numeric
@attribute EmptyBlock numeric
@attribute RecoverFlag numeric
@attribute OtherOperation numeric
@attribute class-att {True,False}

@data
‘‘‘)
        with open(filename) as f:
            contents = f.readlines()

        for content in contents:
            lines = content.split(‘\t‘)
            lines = [line.strip() for line in lines]
            if lines[9] == ‘1‘:
                lines[9] = "True"
                lines.append(‘{‘ + str(value) + ‘}‘)
            else:
                lines[9] = "False"
                lines.append(‘{1}‘)
            array = ‘,‘.join(lines)

            fp.write("%s\n" % array)