python文件执行路径问题

[qq_35439882]

python往相对路径中写日志，单独运行该问题，没问题，但是通过其他程序运行该python文件就会报错
写日志的py文件：
def writeFileName(self,logtext):
nowTime =str(time.strftime("%Y%m%d",time.localtime(time.time())))
timeForWrite = str(time.strftime("%Y-%m-%d %H:%M:%S",time.localtime(time.time())))
fileName = "..\log\\result.txt"
if os.path.exists(fileName):

f = open(fileName,'a+')
f.write(logtext.decode("utf-8").encode("GBK"))
f.close()
else:

f = open(fileName,'w')
f.write(logtext.decode("utf-8").encode("GBK"))
f.close()
通过命令行运行报错：
C:\Users\wanglongjun>python D:\software\python\PyProject\robotization\pythonFile
\runfile\test1.py
Traceback (most recent call last):
File "D:\software\python\PyProject\robotization\pythonFile\runfile\test1.py",
line 21, in <module>
write.writeFileName("test2,2016-08-10 17:29:19,failse,time is out"+"\n")
File "D:\software\python\PyProject\robotization\pythonFile\runfile\test1.py",
line 16, in writeFileName
f = open(fileName,'w')
IOError: [Errno 2] No such file or directory: '..\\log\\result.txt'
在其他python文件中执行该文件也报错：
File "./runfile/test1.py", line 21, in <module>
write.writeFileName("test2,2016-08-10 17:29:19,failse,time is out"+"\n")
File "./runfile/test1.py", line 16, in writeFileName
f = open(fileName,'w')
IOError: [Errno 2] No such file or directory: '..\\log\\result.txt'

跪求各位大神帮忙看看需要如何解决这种情况，跪谢

[sanxiaochengyu]

用__file__的路径，拼接一下

[qq_35439882]

怎么拼接，能否给个实例，或者就我这个问题 ，帮忙解决下，谢谢！

[qq_35439882]

引用 1 楼 a87b01c14 的回复:

用__file__的路径，拼接一下

怎么拼接，能够给个实例呀

[hijack00]

使用绝对路径。 from os.path import abspaht, dirname dirname(abspath(__file__)) 就是当前脚本所在的绝对路径，然后在拼接上你的相对路径

[waterfronter]

假设你要操作的log文件路径为：
D:\software\python\PyProject\robotization\pythonFile\runfile\log\result.txt
你写日记的py文件test1.py路径为：
D:\software\python\PyProject\robotization\pythonFile\runfile\test1.py

这样test1.py中writeFileName函数里应该这样定义路径：

fileName = os.path.abspath(os.path.join(__file__, "../log/result.txt"))

# 其中__file__为当前文件test1.py的绝对路径