python mac address string from a simple string

#Python mac address string from a simple string windows

> f.close() Processing Text File Line-by-Line Line = line.rstrip() # strip trailing spaces and newline # process the line print(line) line = f.readline() > f.close() # Read line-by-line using readline() in a while-loop > f.read() # Read entire file into a string > f.close() # Open the file for reading and read the entire file via read() > f.readline() # Return an empty string after EOF > f.readlines() # Read all (next) lines into a list of strings > f.readline() # Read next line into a string

> f.close() # Always close the file # Check the contents of the file created # Open the file created for reading and read line(s) using readline() and readlines()

#Python mac address string from a simple string windows

The ' ' will be translated to the platform-dependent newline ( ' ' for Windows or ' ' for Unixes/Mac OS).Įxamples # Open a file for writing and insert some records You need to explicitly terminate the str with a ' ', if needed.

fileObj.write( str) -> int: Write the given string to the file and return the number of characters written.

fileObj.read() -> str: Read the entire file into a string.

fileObj.readlines() -> : Read all lines into a list of strings.

It returns an empty string after the end-of-file (EOF).

fileObj.readline() -> str: (most commonly-used) Read next line (upto and include newline) and return a string (including newline).

It initially positions at the beginning of the file and advances whenever read/write operations are performed. The fileObj returned after the file is opened maintains a file pointer.

fileObj.close(): Flush and close the file stream.

You can optionally specify the text encoding via keyword parameter encoding, e.g., encoding='utf-8'. You can also use 'rb', 'wb', 'ab', 'rb+' for binary mode (raw-byte) operations. The available modes are: 'r' (read-only - default), 'w' (write - erase all contents for existing file), 'a' (append), 'r+' (read and write).

open( file, ) -> fileObj: Open the file and return a file object.

Python provides built-in functions and modules to support these operations.

Open the file for read or write or both.

# though they are also defined in the script we call to set them. # We need to use the following globals which must be defined here even :global SYSntpb '1.uk.' # Check and set NTP servers - 'setntppool' # NTP pools to use (check :global SYSntpa '0.uk.' :global SYSsendemail E-mail address to send notifications from # E-mail address to send notifications to # System configuration script - 'GlobalVars' The first defines some system variables which are used in other scripts and the second does the grunt work: This script is required as RouterOS does not allow hostnames to be used in the NTP configuration. This script resolves the hostnames of two NTP servers, compares the result with the current NTP settings and changes the addresses if they're different. :set message message] Īfter new entry is detected, it is saved in 'message' variable, which you can use later to parse log message, for example, to get pppoe clients mac address.Īllow use of ntp.org pool service for NTP Now we can write a script to detect if new entry is added. :for i from=( - 1) to=0 do= while ($lineEnd /log print where buffer=pppoeġ3:11:08 pppoe,info PPPoE connection established from 00:0C:42:04:4C:EE This script is useful if you need ip address without netmask (for example to use it in firewall), but ' /ip address get address' returns ip address and netmask. :put 'ip address $currentIP changed to $newIP' This script will compare if dynamic IP address is changed. Sometimes provider gives dynamic IP addresses. In v3.x it is not possible to create file directly, however there is a workaround

Script examples used in this section were tested with the latest 3.x version. This section contains some useful scripts and shows all available scripting features. 2.3 Include custom function in another script.1.14 Other scripts known to work with latest v3.x.1.12 Allow use of ntp.org pool service for NTP.1.8 Check bandwidth and add limitations.1.6 Generate backup and send it by e-mail.1.5 Write simple queue stats in multiple files.1.2 Check if IP on interface have changed.