小编AdO*_*AdO的帖子

我正在寻找解决方案来加速我编写的函数来循环遍历pandas数据帧并比较当前行和前一行之间的列值.

例如,这是我的问题的简化版本:

   User  Time                 Col1  newcol1  newcol2  newcol3  newcol4
0     1     6     [cat, dog, goat]        0        0        0        0
1     1     6         [cat, sheep]        0        0        0        0
2     1    12        [sheep, goat]        0        0        0        0
3     2     3          [cat, lion]        0        0        0        0
4     2     5  [fish, goat, lemur]        0        0        0        0
5     3     9           [cat, dog]        0        0        0        0
6     4     4          [dog, goat]        0        0        0        0
7     4    11                [cat]        0        0 …

我想知道是否有人遇到过类似的问题并找到了解决方案？我正在尝试在Mac OS X 10.10.2上为Python 2.7.9 Anaconda 2.2.0安装igraph。

我设法brew install homebrew/science/igraph确定，但是当我尝试pip install python-igraph以下错误时：

   grep: /usr/lib/libiconv.la: No such file or directory
        sed: /usr/lib/libiconv.la: No such file or directory
        libtool: link: `/usr/lib/libiconv.la' is not a valid libtool archive
        make[3]: *** [libigraph.la] Error 1
        make[2]: *** [all] Error 2
        make[1]: *** [all-recursive] Error 1
        make: *** [all] Error 2

    Extracting igraph-0.7.1.tar.gz...
    Configuring igraph...
    Could not download and compile the C core of igraph.


    ----------------------------------------
    Command "/Users/Angela/anaconda/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/x5/_j73bjsn10b5q1y_z904g3n40000gn/T/pip-build-nR59Ui/python-igraph/setup.py';exec(compile(getattr(tokenize, …