Python: Statistical system remaining memory

#!/usr/bin/python

With open ('/proc/meminfo ') as FD:

For line in FD:

If Line.startswith (' Memtotal '):

Total = Line.split () [1]

Continue

If Line.startswith (' Memfree '):

Free = Line.split () [1]

Break

freemem = Int (free)/1024.0

Totalmem = Int (total)/1024.0

Print "Freemem:" + "%.2f"% freemem+ ' M '

Print "Totalmem:" + "%.2f"% totalmem+ ' M '

Print "Freemem/totalmem:" + "%.2f"% ((FREEMEM/TOTALMEM) *100) + '% '

The results of the implementation are as follows:

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Description

1, withopen ('/proc/meminfo ') as FD: and fd=open ('/proc/meminfo ') execution of the same results , are traversing the file, the former only in Python 2.6 and later, the latter when the open file reaches a few g, it consumes memory, while the former does not have this problem.

2. String method:

Line.startswith : What starts with, returns a Boolean value (True/false)

Line.split : separated by a space or TAB key to form a list of values (strings) indexed by the list index

3,"%.2f" and "%s " are formatted string output, the former output is reserved two decimal places

This article is from the "M April Days" blog, please be sure to keep this source http://msiyuetian.blog.51cto.com/8637744/1772888

Python: Statistical system remaining memory