title: How to install python debug-info for gdb?
body: <p>I want to use <code>gdb</code> to debug <code>python</code> script. After starting <code>gdb</code>, it outputs:  </p>
  
  <pre><code>[root@localhost scripts]# gdb python
  GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-51.el7
  Copyright (C) 2013 Free Software Foundation, Inc.
  License GPLv3+: GNU GPL version 3 or later &lt;http://gnu.org/licenses/gpl.html&gt;
  This is free software: you are free to change and redistribute it.
  There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
  and "show warranty" for details.
  This GDB was configured as "x86_64-redhat-linux-gnu".
  For bug reporting instructions, please see:
  &lt;http://www.gnu.org/software/gdb/bugs/&gt;...
  Reading symbols from /usr/bin/python2.7...Reading symbols from /usr/bin/python2.7...(no debugging symbols found)..
  .done.
  (no debugging symbols found)...done.
  Missing separate debuginfos, use: debuginfo-install python-2.7.5-16.el7.x86_64
  </code></pre>
  
  <p>According to its prompts, I execute <code>debuginfo-install python-2.7.5-16.el7.x86_64</code> command, and the output is:  </p>
  
  <pre><code>[root@localhost scripts]# debuginfo-install python-2.7.5-16.el7.x86_64
  Loaded plugins: product-id
  centos-extra                                                                               | 3.4 kB  00:00:00
  rhel                                                                                       | 4.1 kB  00:00:00
  centos-extra/primary_db                                                                    | 563 kB  00:00:00
  Could not find debuginfo for main pkg: python-2.7.5-16.el7.x86_64
  Could not find debuginfo pkg for dependency package glibc-2.17-55.el7.x86_64
  Could not find debuginfo pkg for dependency package python-libs-2.7.5-16.el7.x86_64
  No debuginfo packages available to install
  </code></pre>
  
  <p>P.S.: There are 2 yum data source: the RHEL 7.0 iso and CentOS link:  </p>
  
  <pre><code>[rhel]
  name=rhel 7.0
  baseurl=file:///mnt/iso
  enabled=1
  gpgcheck=0
  
  
  [centos-extra]
  name=centos extra
  baseurl=http://cbs.centos.org/repos/virt7-testing/x86_64/os/
  enabled=1
  gpgcheck=0
  </code></pre>
  
  <p>How can I install python debug-info?</p>