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The psutil module is a cross-platform library https://github.com/giampaolo/psutil

Command line installation via pip:

pip install psutil

If you install Anaconda like me, then this step is left, because it comes with it.

as the name

psutil = process and system utilities

It is specifically used to obtain operating system and hardware-related information, such as CPU, memory, disk, network, process management, etc.

Today's article will introduce you to its common functions and methods of use.

Query CPU information

First import the psutil module to obtain CPU information data.

import psutil# CPU logical count psutil.cpu_count()# CPU physical core psutil.cpu_count(logical=False)#Count CPU user/system/idle time psutil.cpu_times()# interval: Refresh every 0.5s # percpu: View all CPU usage for x in range(5): print(psutil.cpu_percent(interval=0.5, percpu=True))

Output:

Note: If you are interested in Jupyter Notebook outputting multiple variables at the same time, you can check out this article.

15 Jupyter Notebook tips to master (summary)

Query memory information

Output memory usage (total memory, available memory, memory usage, used memory).

psutil.virtual_memory()

For example, the total=16499146752 output above is the total memory 16G, used memory/total memory = 76.0%(memory utilization).

Query disk information

Disk partitions, disk usage, and disk IO information can be obtained through psutil.

#Disk partition information psutil.disk_partitions()#Disk usage psutil.disk_usage ('/')#Disk IOpsutil.disk_io_counters()

Among them, the IO information indicator returned includes disk IO information.

read_count

write_count

read_bytes (IO write bytes)

read_time

write_time (disk write time)

Query network information

Use psutil library to query the number of bytes/packets read and written on the network.

psutil.net_io_counters()

Among them, the returned data indicators include

btes_sent: Number of bytes sent

bytes_recv: Number of bytes received

packets_sent: Amount of packet data sent

packets_recv: Amount of packet data received

errin: Number of errors when receiving packets

errout: Number of errors when sending packets

dropin: Number of dropped packets received

dropout: Number of times a packet is dropped when it is sent

In addition, there are many functions to obtain network interface and network connection information.

such as

psutil.net_if_addrs() Get network interface information

psutil.net_if_stats() Get network interface status, etc.

Query process information

Finally, the psutil module can also be used to obtain detailed information about all processes!

psutil. pies () #All process IDs

The returned result includes all process IDs (pid).

According to pid, you can get the Process object corresponding to a process, and this object contains all the data of the process.

Below we specify process ID=113408, which is actually the current Python interaction environment, to get information about the process.

#Get the specified process ID=113408, which is actually the current Python interactive environment p = psutil.Process(113408)#Process name p.name()#Process exe path p.exe ()#Process working directory p.cwd()#Process start command line p.cmdline()#Current process idp.pid

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