Atish patel

In this script, we will see how to send emails in Python using the SMTPLIB library. SMTPLIB is a popular python library that is useful to send email via script.

You do not have to install it, because the library comes by default. In the below python script we use Gmail for the demo, but in your case, you have to use your email server.

Before you understand the script, let’s see what are the details you need to send an email in python. Check out the python series for storage admin.

Pre-Requisites To Send Email In Python

In order for the script to work, you need to import the library. As the SMTPLIB library comes by default with python, hence, you do not need to install it.

You also need a SMTP server and ports. You can get them for your team who are responsible for managing the exchange servers.

Once you get the SMTP server and port, make sure that the server where your script will run is allowed to send an email. Usually, a server is allowed to send an email if it is added to the SMTP relay.

Python Scripts to Send Email

Below is the entire script which sends email in python. You just have to modify the SMTP server and port. Notice that the username and password for the Gmail account are saved in the text file. If you are using the script in your company, then you can remove those lines.

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
msg= MIMEMultipart('alternative')
msg['Subject'] = 'Test Mail'
From = "fromemailaddress@gmail.com"
To = "toemailaddress@yahoo.co.in"
Cc = "ccemailaddress@yahoo.co.in"
text = "Info Collector"
data = "Body content of the mail"
part1 = MIMEText(text, 'plain')
part2 = MIMEText(data, 'plain')
msg.attach(part1)
msg.attach(part2)
s=smtplib.SMTP('smtp.gmail.com', 587)
s.ehlo()
s.starttls()
gmail_cred = open("gmail_cred.txt","r").read().split(",")
s.login(gmail_cred[0],gmail_cred[1])
s.sendmail(From, To ,msg.as_string())
s.quit()

If you need more details on the script, then watch the below YouTube video. This video is part of series which explains python scripting for Storage Admin.

This post will see how to write a python script for login multiple Unix servers and execute a command. Additionally, the python script is going to save the output of that command in a text file.

Automate Boring Stuff With Python

Overview of Python Script For Login Multiple Unix Server

Before writing any scripts, it necessary to prepare the steps. It would be best if you considered every action that you do manually.

Below are the overall steps of Python Script For Login Multiple Unix Server

1. Install the Paramiko module.
2. Read the credential from a CSV file.
3. Log in to multiple Unix servers one by one.
4. Execute a command.
5. Save the output in a text file.

You can check out the below YouTube video for a live demo of the script.

Prerequisite For Python Script Login Multiple Server

Before we start writing the script, let us discuss the prerequisite to writing the script.

To write a Python Script For Login multiple servers, you need a paramiko library. Hence, first, install the python library.

Paramiko library is useful to connect any device which supports SSH connectivity.

Go to command prompt and execute the below command to install the paramiko module.

pip install paramiko

Once you install the library, create a CSV file in the below format and name it, “cred.csv.”

Read python file handling post.

server1,username,password
server2,username,password

Keep the cred.csv file and the script in the same location.

Complete Python Script For Login Multiple Unix Server

Below is the complete python which can login to the multiple server and execute command.

import paramiko
p = paramiko.SSHClient()
cred = open("cred.csv","r")
for i in cred.readlines():
    line=i.strip()
    ls =line.split(",")
    p.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    p.connect("%s"%ls[0],port =22, username = "%s"%ls[1], password="%s"%ls[2])
    stdin, stdout, stderr = p.exec_command("uname -a")
    opt = stdout.readlines()
    opt ="".join(opt)
    print(opt)
    temp=open("%s.txt"%ls[0],"w")
    temp.write(opt)
    temp.close()
cred.close()

Explanation

The script’s first line imports a library, and the second line creates an object “p.”

The third line opens the cred.csv file and stores the content in the variable cred.

Then a for loop starts and reads all the lines of the credential file. Each line is converted into a python list with split function.

From the python list, the script fetches the server name and its user name and password. After that, using those credentials, the script connects to the device and executes the command.

The variable “opt” stores the output of the command. Finally, the script creates a file with the server name and stores the content in it.

Conclusion For Storage Admin

The script is capable of connecting to any device that supports SSH. Hence, a storage admin can use this python script to collect logs from Cisco, Brocade switch, Isilon, and NetApp.

You have to modify the “cred.csv” file and mention the correct command.

Checkout out the post for sending mail in python.

In this post, we will see how we can convert python scripts to binary files. In a more pythonic way how to convert .py file to .exe file.

But first, lets understand why there is a need of binary files.

Automate Boring Stuff With Python

Merits of Binary Files

The binary file can be executed in any system without installing the actual scripting language or any module. A developer can convert scripts to binary files and give it to the client. A client can use the binary file to run the script.

One thing to note that you have to run the binary file in 64 bit operating system only if you have used a 64 bit operating system to convert .py file to .exe file.

Check out our entire posts on python scripting for storage admins.

Convert a Python Scripts To Binary Files

We will use a python module called pyinstaller to convert a .py file to .exe file. Py

Step 1. Open Command Prompt

Step 2. Install pyinstaller module by executing below command

pip install pyinstaller

Step 2. Traverse to the directory where the python file is located.

Step 3. Convert Python Files to Binary Files

pyinstaller info_collector.py –onefile

The above command will bundle all dependencies and convert python scripts to binary files. The location of the .exe file will be displayed at the bottom.

Just copy that .exe file and run it.

If you still need more information, then check out the below YouTube video. It explains a step by step guide to convert a .py file to .exe file.

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