If you want to create a tool such as Windows task manager or Process Explorer in Python then the psutil library is the perfect place to start
psutil (python system and process utilities) is a cross-platform library for retrieving information on running processes and system utilization (CPU, memory, disks, network, sensors) in Python.
It is useful mainly for system monitoring, profiling, limiting process resources and the management of running processes.
It implements many functionality offered by UNIX command line tools such as: ps, top, lsof, netstat, ifconfig, who, df, kill, free, nice, ionice, iostat, iotop, uptime, pidof, tty, taskset, pmap.
psutil currently supports the following platforms:
- Linux
- Windows
- macOS
- FreeBSD, OpenBSD, NetBSD
- Sun Solaris
- AIX
The supported Python versions are 2.6, 2.7 and 3.4+
Installation
pip install psutil
Example
This example shows many of the functions
# Retrieving information regarding the CPU
## Returns the system CPU times as a named tuple
print(psutil.cpu_times())
## Returns the system-wide CPU utilization as a percentage
print(psutil.cpu_percent())
## Returns the number of logical CPUs in the system
print(psutil.cpu_count())
## Returns the various CPU statistics as a tuple
print(psutil.cpu_stats())
## Returns the CPU frequency as a nameduple
print(psutil.cpu_freq())
# Retrieving information regarding the Memory
## Returns statistics about system memory usage as a named tuple
print(psutil.virtual_memory())
## Returns system swap memory statistics as a named tuple
print(psutil.swap_memory())
# Retrieving information regarding the Disks
## Returns all mounted disk partitions as a list of named tuples
print(psutil.disk_partitions())
## Returns disk usage statistics about the partition
print(psutil.disk_usage('/'))
## Returns system wide disk I/O statistics as a named tuple
print(psutil.disk_io_counters())
# Retrieving information regarding the Network
## Returns System wide network I/O statistics as a named tuple
print(psutil.net_io_counters())
## Returns system wide socket connections as a list of named tuples
print(psutil.net_connections())
## Returns addresses associated to each network interface card
print(psutil.net_if_addrs())
## Returns information regarding each network interface card
print(psutil.net_if_stats())
# Retrieving information regarding the Sensors
## Returns battery status information as a named tuple
print(psutil.sensors_battery())
# Retrieving information regarding Other System information
## Returns the system boot time
print(psutil.boot_time())
## Return users currently connected on the system
print(psutil.users())
Links
For more info regarding all the functions then the documentation is the best place to start
https://psutil.readthedocs.io/en/latest/#
