Python help() Function

In Python, the help() function can be used to obtain help information. The purpose of the help() function is to print the documentation for a specified object. If no parameters are specified, it enters interactive help mode.

In interactive help mode, you can input any Python statement or expression, and the program will return their help information. Use the quit command to exit interactive help mode.

help() Function Examples

Here are some examples of using the help() function:

def square(x):
    """
    Calculate the square of a number
    """
    return x**2

help(square)

Program Output:

Help on function square in module __main__:

square(x)
    Calculate the square of a number

Can be used on functions or modules to obtain related help information:

# Get information about a function
help(print)

# Get information about a module
import math
help(math)

Enter interactive mode by not specifying any parameters, type quit to exit:

help()