我在使用web2py时遇到问题。我的模块文件夹中有一个名为defVals.txt的文本文件。我尝试使用open("defVals.txt")(在与defVals.txt相同的控制器中的模块中)从中读取内容,但出现错误:

Traceback (most recent call last):
 File "/home/jordan/web2py/gluon/restricted.py", line 212, in restricted
   exec ccode in environment
File "/home/jordan/web2py/applications/randommotif/controllers/default.py", line 67,     in <module>
 File "/home/jordan/web2py/gluon/globals.py", line 188, in <lambda>
self._caller = lambda f: f()
File "/home/jordan/web2py/applications/randommotif/controllers/default.py", line 13, in index
  defaultData = parse('defVals.txt')
File "applications/randommotif/modules/defaultValParser.py", line 6, in parse
 lines = open(fileName)
IOError: [Errno 2] No such file or directory: 'defVals.txt'


我究竟做错了什么?我应该在哪里放置defVals.txt

我正在使用Ubuntu 12.10

谢谢,

约旦

更新:

这是defaultValParser.py的源代码:

import itertools
import string
import os
from gluon import *
from gluon.custom_import import track_changes; track_changes(True)

#this returns a dictionary with the variables in it.
def parse(fileName):
    moduleDir = os.path.dirname(os.path.abspath('defaultValParser.py'))
    filePath = os.path.join(moduleDir, fileName)
    lines = open(filePath, 'r')
    #remove lines that are comments. Be sure to remove whitespace in the beginning and end of line
    real = filter(lambda x: (x.strip())[0:2] != '//', lines)
    parts = (''.join(list(itertools.chain(*real)))).split("<>")
    names = map(lambda x: (x.split('=')[0]).strip(), parts)
    values = map(lambda x: eval(x.split('=')[1]), parts)
    return dict(zip(names, values))


如果我从终端导入并调用它(如果我注释掉了胶子导入),它可以正常工作,但是如果我从web2py控制器调用它,它将完全失败:

Traceback (most recent call last):
  File "/home/jordan/web2py/gluon/restricted.py", line 212, in restricted
   exec ccode in environment
  File "/home/jordan/web2py/applications/randommotif/controllers/default.py", line 71, in <module>
  File "/home/jordan/web2py/gluon/globals.py", line 188, in <lambda>
  self._caller = lambda f: f()
  File "/home/jordan/web2py/applications/randommotif/controllers/default.py", line 17, in index
  defaultData = parse('defVals.txt')
  File "applications/randommotif/modules/defaultValParser.py", line 6, in parse
 IOError: [Errno 2] No such file or directory: 'defVals.txt'

最佳答案

使用基于模块的__file__路径的绝对路径:

moduledir = os.path.dirname(os.path.abspath('__file__'))

# ..
defaultData = parse(os.path.join(moduledir, 'defVals.txt'))


__file__是当前模块的文件名,使用该文件的.dirname()会给您模块所在的目录。我使用.abspath()来确保您始终有模块文件的绝对路径,以确保否则可能会击中某些边缘情况。

moduledir是模块中的全局变量。

关于python - 从文本文件web2py读取,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/14015128/

10-11 22:56
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