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这篇文章将为大家详细讲解有关如何解决python中dev安装失败的问题，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
安装tensorflow之前需要先安装python—dev， 这个不能用pip install来安装，只能用sudo apt-get install来安装。安装后会发现还要
先装另外两个东西，但是装这两个东西也还要继续装其他东西，相当麻烦且并没有成功
~$ sudo apt-get install python-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
python-dev : Depends: libpython-dev (= 2.7.11-1) but it is not going to be installed
Depends: python2.7-dev (>= 2.7.11-1~) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
用aptitude 工具可以搞定
先：sudo apt-get install aptitude
然后：
sudo aptitude install python-dev，之后会出现：
sudo aptitude install python-dev
The following NEW packages will be installed:
libexpat1-dev{ab} libpython-dev{a} libpython2.7-dev{ab} python-dev
python2.7-dev{ab}
packages upgraded, 5 newly installed, 0 to remove and 1 not upgraded.
Need to get 28.1 MB of archives. After unpacking 42.1 MB will be used.
The following packages have unmet dependencies:
python2.7-dev : Depends: python2.7 (= 2.7.11-2) but 2.7.12-1ubuntu0~16.04.1 is installed.
Depends: libpython2.7 (= 2.7.11-2) but 2.7.12-1ubuntu0~16.04.1 is installed.
libexpat1-dev : Depends: libexpat1 (= 2.1.0-7) but 2.1.0-7ubuntu0.16.04.2 is installed.
libpython2.7-dev : Depends: libpython2.7-stdlib (= 2.7.11-2) but 2.7.12-1ubuntu0~16.04.1 is installed.
Depends: libpython2.7 (= 2.7.11-2) but 2.7.12-1ubuntu0~16.04.1 is installed.
open: 24; closed: 106; defer: 16; conflict: 21 .The following actions will resolve
these dependencies:
Keep the following packages at their current version:
1) libexpat1-dev [Not Installed]
2) libpython-dev [Not Installed]
3) libpython2.7-dev [Not Installed]
4) python-dev [Not Installed]
5) python2.7-dev [Not Installed]
Accept this solution? [Y/n/q/?] n 这里一定要n，因为给的solution是保持现在的状态，即不安装
The following actions will resolve these dependencies:
Downgrade the following packages:
1) libexpat1 [2.1.0-7ubuntu0.16.04.2 (now) -> 2.1.0-7 (xenial)]
2) libpython2.7 [2.7.12-1ubuntu0~16.04.1 (now) -> 2.7.11-2 (xenial)]
3) libpython2.7-minimal [2.7.12-1ubuntu0~16.04.1 (now) -> 2.7.11-2 (xenial)]
4) libpython2.7-stdlib [2.7.12-1ubuntu0~16.04.1 (now) -> 2.7.11-2 (xenial)]
5) python2.7 [2.7.12-1ubuntu0~16.04.1 (now) -> 2.7.11-2 (xenial)]
6) python2.7-minimal [2.7.12-1ubuntu0~16.04.1 (now) -> 2.7.11-2 (xenial)]
Accept this solution? [Y/n/q/?] y 接受新状态就可以安装了关于如何解决python中dev安装失败的问题就分享到这里了，希望以上内容可以对大家有一定的帮助，可以学到更多知识。如果觉得文章不错，可以把它分享出去让更多的人看到。
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