检查是否安装了包的 Pythonic 方法
问题描述
检查安装在 Centos/Redhat 中的软件包列表的 Pythonic 方法?
Pythonic way to check list of packages installed in Centos/Redhat?
在 bash 脚本中,我会这样做:
In a bash script, I'd do:
rpm -qa | grep -w packagename
解决方案
import sys
import rpm
ts = rpm.TransactionSet()
mi = ts.dbMatch( 'name', sys.argv[1] )
try :
h = mi.next()
print "%s-%s-%s" % (h['name'], h['version'], h['release'])
except StopIteration:
print "Package not found"
- TransactionSet() 将打开 RPM 数据库
- 不带参数的dbMatch会设置一个匹配迭代器来遍历整个安装的包,你可以在匹配迭代器上调用next来获取下一个条目,一个代表一个包的头对象
dbMatch 也可用于查询特定的包,您需要传递一个标签的名称,以及您要查找的该标签的值:
- TransactionSet() will open the RPM database
- dbMatch with no paramters will set up a match iterator to go over the entire set of installed packages, you can call next on the match iterator to get the next entry, a header object that represents one package
dbMatch can also be used to query specific packages, you need to pass the name of a tag, as well as the value for that tag that you are looking for:
dbMatch('name','mysql')
相关文章