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  • Numpy安装报错:试过N种安装方法终于

    Import numpy时,会报下面的错误

    /home/spyros/.local/lib/python2.7/site-packages/numpy/core/multiarray.so: undefined symbol: PyUnicodeUCS2_FromObject

    忘了截图,大概就是PyUnicodeUCS2引发的错误,提示我某些c扩展编译有问题。可是天地良心啊,我都是直接pip装的T_T

    解决路径:

    1. 用pip uninstall numpy,在/usr/local/lib/python2.7/site-packages删掉numpy*文件夹,然后继续pip install。
    2. 下载miniconda,删掉原来的,然后用conda install numpy
    3. 从zip手动装,主目录下python setup.py install
    4. Pip升级之后再重装
    5. 重启虚拟机/电脑

    直到我发现了这个解释:

    You can check the size of the Unicode character a Python interpreter is using by checking the value of sys.maxunicode:

    >>> import sys
    >>> if sys.maxunicode > 65535:
    ...     print 'UCS4 build'
    ... else:
    ...     print 'UCS2 build'

    没错,我的是UCS4 build,但是貌似那些c扩展编译的时候默认的是UCS2?

    所以需要重新编译我的python27。

    进入python27的安装目录(天啦噜我都不知道我是第几次安装了):

    /home/pangxiaoyi/app/Python-2.7.13

    注:这里可以用sys.path来打印

     

    这里先给Python-2.7*加上777 -R权限,后面都sudo。

    ./configure --enable-unicode=ucs4 --with-ssl

    make

    sudo make install

    然后再重新sudo pip install numpy以及pandas

    (numpy会影响pandas,所以要重装)

     

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  • 原文地址:https://www.cnblogs.com/pxy7896/p/10032959.html
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