all#

Function all returns True if all elements are true (or object is empty).

In [1]: all([False, True, True])
Out[1]: False

In [2]: all([True, True, True])
Out[2]: True

In [3]: all([])
Out[3]: True

For example, it is possible to check that all octets in an IP address are numbers:

In [4]: ip = '10.0.1.1'

In [5]: all([i.isdigit() for i in ip.split('.')])
Out[5]: True

In [6]: all([i.isdigit() for i in '10.1.1.a'.split('.')])
Out[6]: False

any#

Function any returns True if at least one element is true.

In [7]: any([False, True, True])
Out[7]: True

In [8]: any([False, False, False])
Out[8]: False

In [9]: any([])
Out[9]: False

In [10]: any([i.isdigit() for i in '10.1.1.a'.split('.')])
Out[10]: True

For example, with any you can replace ignore_command function:

def ignore_command(command):
    '''
    Function checks if command contains a word from ignore list.
    * command is a string. Command that need to be checked returns True
    * if command contains a word from ignore list, False - if not.
    '''
    ignore = ['duplex', 'alias', 'Current configuration']

    for word in ignore:
        if word in command:
            return True
    return False

To this option:

def ignore_command(command):
    '''
    Function checks if command contains a word from ignore list.
    * command is a string. Command that need to be checked returns True
    * if command contains a word from ignore list, False - if not.
    '''
    ignore = ['duplex', 'alias', 'Current configuration']

    return any([word in command for word in ignore])