以安装安装第三方库 pdb-clone 为例。

# 一、下载第三方库

[pdb-clone](https://github.com/Mistobaan/pdb-clone/)

下载后解压，文件如下：

```bash
[yz@test pdb-clone]$ ll
-rw-rw-r-- 1 yz   yz     416 Mar 31  2015 foobar.py
drwxrwxr-x 5 yz   yz      87 Jun 22 14:34 lib
-rw-rw-r-- 1 yz   yz   18113 Mar 31  2015 LICENSE
-rw-rw-r-- 1 yz   yz     229 Mar 31  2015 MANIFEST.in
lrwxrwxrwx 1 yz   yz      22 Jun 22 14:32 NEWS -> pdb-clone.wiki/News.md
-rwxr-xr-x 1 yz   yz      66 Mar 31  2015 pdb-attach
-rwxr-xr-x 1 yz   yz     206 Mar 31  2015 pdb-clone
drwxrwxr-x 2 yz   yz      36 Mar 31  2015 python_patches
lrwxrwxrwx 1 yz   yz      22 Jun 22 14:32 README -> pdb-clone.wiki/Home.md
-rw-rw-r-- 1 yz   yz    1722 Mar 31  2015 README.rst
-rw-rw-r-- 1 yz   yz    6339 Mar 31  2015 setup.py
drwxrwxr-x 2 yz   yz      89 Mar 31  2015 testsuite
```

# 二、安装

```
[yz@test pdb-clone]$ python setup.py build
[yz@test pdb-clone]$ sudo python setup.py install
```

# 三、问题

build安装过程中出现以下错误：

```bash
[yz@test pdb-clone]$ python setup.py build
Traceback (most recent call last):
  File "setup.py", line 12, in <module>
    from test import test_support as support    # Python 2
  File "/usr/lib64/python2.7/test/test_support.py", line 22, in <module>
    import _testcapi
ImportError: No module named _testcapi
```

需要安装python-test：

```bash
[yz@test pdb-clone]$ sudo yum install python-test
```

# 四、参考

- [python安装模块如何通过setup.py安装(超简单)](https://www.jb51.net/article/139526.htm)
- [Attaching a process with pdb](https://stackoverflow.com/questions/25308847/attaching-a-process-with-pdb)
- [No module named _testcapi](https://stackoverflow.com/questions/33179764/no-module-named-testcapi)