Centos 6.6，python 2.7.2对象没有属性'StringIO(Centos 6.6, python 2.7.2 object has no attribute 'StringIO)

 我正在尝试在docker容器中运行我的python测试。 这是使用CentsOS 6.6安装python .2.7.2的Dockerfile的一部分： 
 
RUN cd /tmp && \
    wget https://www.python.org/ftp/python/2.7.2/Python-2.7.2.tgz && \
    tar xvfz Python-2.7.2.tgz && \
    cd Python-2.7.2 && \
    ./configure --prefix=/usr/local && \
    make && \
    make altinstall

RUN ln -s /usr/local/bin/python2.7 /usr/local/bin/python

RUN wget https://bootstrap.pypa.io/ez_setup.py -O - | /usr/local/bin/python2.7
RUN /usr/local/bin/easy_install-2.7 pip
RUN pip install python-gflags sqlparse pyyaml requests HTTPretty
 
 在docker容器中运行我的测试时出现异常： 
 
import io
# some code here...
buf = io.StringIO(data)
AttributeError: 'module' object has no attribute 'StringIO'
 
 在本地或服务器环境中运行测试时，我不会遇到此异常。 
 
 我试图在docker容器中执行简单的脚本： 
 
import io
print io.StringIO(None)
 
 工作正常。 我很困惑。 这可能是什么问题？ 
 
 @Blckknght，你是对的，代码有名为io的模块： 
 
 io.__file__ ::: /root/containerfolder/proejct/py/src/common/io.pyc 。 但我只能在码头工具中重现它。 当我将代码复制粘贴到服务器或在本地运行时，我说得对 
 
 io.__file__ ::: /opt/py/ext/python-2.7.2/lib/python2.7/io.pyc 
 
 什么是修复它的正确方法exept重命名模块:)？ 
 
 回答： 
 
 
 
 @Blckknght是对的，有一个名为“IO”（!!!大写!!!）的代码模块隐藏了内置的“io” 
 
 
 我的“本地”MacOS FS不区分大小写，但保留大小写，它区分io和IO，这就是为什么我在本地获得正确的“io”。 
 
 
 服务器具有区分大小写的FS 
 
 
 Docker镜像具有不区分大小写的FS。 这就是它失败的原因。 
 
 
 这是一个很好的挑战，谢谢:) 

I'm trying to run my python tests inside docker container. Here is a part of Dockerfile that installs python .2.7.2 using CentsOS 6.6:
 
RUN cd /tmp && \
    wget https://www.python.org/ftp/python/2.7.2/Python-2.7.2.tgz && \
    tar xvfz Python-2.7.2.tgz && \
    cd Python-2.7.2 && \
    ./configure --prefix=/usr/local && \
    make && \
    make altinstall

RUN ln -s /usr/local/bin/python2.7 /usr/local/bin/python

RUN wget https://bootstrap.pypa.io/ez_setup.py -O - | /usr/local/bin/python2.7
RUN /usr/local/bin/easy_install-2.7 pip
RUN pip install python-gflags sqlparse pyyaml requests HTTPretty
 
I get an exception while running my tests inside docker container:
 
import io
# some code here...
buf = io.StringIO(data)
AttributeError: 'module' object has no attribute 'StringIO'
 
I don't get this exception while running tests locally or on server env.
 
I tried to execute simple script in docker container:
 
import io
print io.StringIO(None)
 
Works fine. I'm confused. What could be the problem here?
 
@Blckknght, you are right, code has module named io: 
 
io.__file__ ::: /root/containerfolder/proejct/py/src/common/io.pyc. But I can reproduce it only in docker. When I copy-paste code to server or run it locally, I'm getting right 
 
io.__file__ ::: /opt/py/ext/python-2.7.2/lib/python2.7/io.pyc
 
What is the right way to fix it exept renaming the module :) ?
 
ANSWER:
 
 
 
@Blckknght is right, there is a code module named "IO" (!!!uppercase!!!) that hides built-in "io" 
 
 
My "local" MacOS FS is case insensitive, but case preserving, it distinguishes io and IO, that is why I'm getting correct "io" locally. 
 
 
Server has case-sensitive FS 
 
 
Docker image has case insensitive FS. That is why it fails only there.
 
 
It was nice challenge, thanks :)

原文：https://stackoverflow.com/questions/33927071