无法安装mahotas，并且安装python无法修复错误。

Question

我正在编写一本教科书，其中一个例子是python所需的mahotas。我立即尝试用pip安装它，并立即得到以下错误：

 x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -DNPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION -DPY_ARRAY_UNIQUE_SYMBOL=Mahotas_PyArray_API_Symbol -I/usr/local/lib/python3.4/dist-packages/numpy/core/include -I/usr/include/python3.4m -c mahotas/_convex.cpp -o build/temp.linux-x86_64-3.4/mahotas/_convex.o
    cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++ [enabled by default]
    In file included from mahotas/numpypp/array.hpp:17:0,
                     from mahotas/_convex.cpp:7:
    mahotas/numpypp/numpy.hpp:10:20: fatal error: Python.h: No such file or directory
     #include <Python.h>
                    ^
    compilation terminated.
    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

 ----------------------------------------
Command "/usr/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-kzn3_c4k/mahotas/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-y19bwul7-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-kzn3_c4k/mahotas/

现在，在查找了其他#include <Python.h>和error: command 'x86_64-linux-gnu-gcc错误之后，我一直被告知要安装python-dev。不幸的是，这也立即失败了，因为python-dev已经是最新版本了，对于python3-dev，我得到了以下内容：

The following packages have unmet dependencies:
python3-dev : Depends: libpython3-dev (= 3.4.0-0ubuntu2) but it is not going to be installed
             Depends: python3.4-dev (>= 3.4.0-0~) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.   

当我试着安装它的时候？

答：

The following packages have unmet dependencies:
 libpython3-dev : Depends: libpython3.4-dev (>= 3.4.0-0~) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

然后：

The following packages have unmet dependencies:
 libpython3.4-dev : Depends: libpython3.4-stdlib (= 3.4.0-2ubuntu1) but 3.4.3-1ubuntu1~14.04.3 is to be installed
                    Depends: libpython3.4 (= 3.4.0-2ubuntu1) but 3.4.3-1ubuntu1~14.04.3 is to be installed
E: Unable to correct problems, you have held broken packages.

B：

The following packages have unmet dependencies:
 python3.4-dev : Depends: python3.4 (= 3.4.0-2ubuntu1) but 3.4.3-1ubuntu1~14.04.3 is to be installed
                 Depends: libpython3.4-dev (= 3.4.0-2ubuntu1) but it is not going to be installed
                 Depends: libpython3.4 (= 3.4.0-2ubuntu1) but 3.4.3-1ubuntu1~14.04.3 is to be installed
E: Unable to correct problems, you have held broken packages.

这是个兔子洞。我怎么才能逃脱？

Answer 1

(本文作者为mahotas )。

您的Ubuntu安装现在处于某种奇怪的状态，wrt是Python包。我建议离开兔子洞的建议是使用Anaconda：https://www.continuum.io/why-anaconda

然后，您可以从conda-forge项目获得mahotas：https://anaconda.org/conda-forge/mahotas。

康达锻造是一个社区项目，将保持它的最新。Anaconda还有其他优势。

Answer 2

如果已经安装了Anaconda，可以在命令行中输入以下代码：

conda install -c conda-forge mahotas

对我来说很管用