python2.7 安裝pycrypto庫報錯

 

windows + python2.7

 

先安裝VC包

https://download.microsoft.com/download/7/9/6/796EF2E4-801B-4FC4-AB28-B59FBF6D907B/VCForPython27.msi

再執行命令

pip install pycrypto

 

 

linux + python2.7

 

python安裝pycrypto報錯

error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

查看gcc已經安裝，最后找到解決辦法安裝python-dev庫就可以

sudo apt-get install python-dev

安裝完之后再安裝pycrypto正常了。

~$ 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

之后會出現：

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}
0 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 這里一定要n，因為給的solution是保持現在的狀態，即不安裝

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     接受新狀態就可以安裝了