升级pyudev问题

Question

我正在尝试将pyudev包从0.15更新到0.16.x或更高，但会显示以下消息：

$ sudo pip install pyudev 0.21.0 -U
Collecting pyudev
  Using cached https://files.pythonhosted.org/packages/bc/a2/31a07829acea8e70a28c247f43fa5d981229ae0f9edfeddedf52de00709b/pyudev-0.21.0.tar.gz
Collecting 0.21.0
  Could not find a version that satisfies the requirement 0.21.0 (from versions: )
No matching distribution found for 0.21.0

知道怎么解决吗？

注意：dnspython也会发生同样的情况。

Answer 1

您输入的命令格式错误。有效的需求说明符是：

• packagename
• packagename==version
• packagename>=version (或<=)
• packagename>version (或<)

为确切的版本说明符添加==符号：

$ pip install pyudev==0.21.0