Sys Module

In Python, The "sys module" gives access to interpreter-specific variables used or maintained by the Python interpreter and functions that interact strongly with the interpreter.

The sys module has access to system-level information and handles command-line arguments as well.

Understanding and consuming the `sys module` can be beneficial for various tasks like debugging, command-line scripting and system-level operations.

Common functionalities provided by the "sys module":

System-Specific Parameters and Functions:

sys.argv:

This list contains the command-line arguments passed to the Python script.

Example:

# import sys module
import sys

print(sys.argv)

sys.platform:

Example:

# import sys module
import sys

print(sys.platform)

Returns the platform identifier for the current platform.

sys.version:

Returns a string containing the Python version number and additional information.

Example:

# import sys module
import sys

print(sys.version)

sys.exit([arg]):

Exits from the running Program, optionally with a specified exit status.

Example:

# import sys module
import sys

sys.exit()  # Exits the program with the default exit status (0)

Runtime Environment:

sys.path:

A list of strings that specifies the search path for modules.

Example:

# import sys module
import sys

print(sys.path)

sys.modules:

A dictionary that maps module names to modules that have already been loaded.

Example:

# import sys module
import sys

print(sys.modules)

sys.stdin, sys.stdout, sys.stderr:

These file-like objects are used for standard input, standard output, and standard error streams, respectively.

sys.stdin: The `sys.stdin` is an object that stores the original values of stdin at the program's start and is used during finalization. It can restore the files as well.

Example:

# import sys module
import sys

sys.stdout.write("Hello, World!\n")

Memory Management:

sys.getsizeof(object[, default]):

Returns the size of the object in bytes.

Example:

# import sys module
import sys

print(sys.getsizeof([]))

sys.getrefcount(object):

Returns the reference count of the object. This is an approximation and may vary across implementations.

Example:

# import sys module
import sys

print(sys.getrefcount(42))

sys.maxsize:

The `sys.maxsize` function returns the largest integer of a variable.

Note:

These are just a few examples of what we can do with the sys module.

It provides many more functions and variables for interacting with the Python interpreter and is used to manipulate different parts of the Python runtime environment.

Always ensure to import the sys module using (import sys) before using its functions and variables.

<-- Statistics Modules

Collections Modules -->