- Introduction
Video https://vimeo.com/243034300
Length is 7 minutes
- Why Learn Programing?
Video https://vimeo.com/243905715
Length is 1 minute
- Why Python?
Video https://vimeo.com/243909371
Length is 3 minutes
- Python2 versus Python3
Video https://vimeo.com/243912631
Length is 2 minutes
- Characteristics of Python
Video https://vimeo.com/243918300
Length is 5 minutes
- The Python Interpreter Shell
Video https://vimeo.com/242411259
Length is 9 minutes
- IPython
Video https://vimeo.com/242460561
Length is 4 minutes
- Printing to stdout and Reading from stdin
Video https://vimeo.com/243028886
Length is 6 minutes
- Dir, Help, and Variables
Video https://vimeo.com/243480156
Length is 10 minutes
- Python Strings (Part 1)
Video https://vimeo.com/243481392
Length is 6 minutes
- Python Strings (Part 2)
Video https://vimeo.com/243482081
Length is 8 minutes
- Python Strings (Part 3)
Video https://vimeo.com/243482871
Length is 10 minutes
- Python String Formatting (Part 1)
Video https://vimeo.com/243936489
Length is 12 minutes
- Python String Formatting (Part 2)
Video https://vimeo.com/243956669
Length is 4 minutes
Additional Content:
Google Python Course on Strings
Automate the Boring Stuff with Python (Chapter 6 on Strings)
*Read up through the section on .join() and .split() string methods.
1. Python naming conventions:
a. For variable names, function names, object names, and module names use lower case separated by underscore, for example:
my_router
find_set_of_devices
convert_id_string_to_list
b. For class names, capitalize the first letter of each word. Do not use any underscores. For example:
ManyToManyField
ClientHistory
UserProfile
c. For constants, use all upper case; use underscores for word separation.
PI = 3.14
EMAIL_MODE
EMAIL_FROM_ADDRESS
Exercises
Reference code for these exercises is posted on GitHub at:
https://github.com/ktbyers/pynet/tree/master/learning_python/lesson1
1. Create a Python script that has three variables: ip_addr1, ip_addr2, ip_addr3 (representing three corresponding IP addresses). Print these three variables to standard output using a single print statement.
Make your print statement compatible with both Python2 and Python3.
If you are using either Linux or MacOS make your program executable by adding a shebang line and by changing the files permissions (i.e. chmod 755 exercise1.py).
2. Prompt a user to enter in an IP address from standard input. Read the IP address in and break it up into its octets. Print out the octets in decimal, binary, and hex.
Your program output should look like the following:
$ python exercise2.py
Please enter an IP address: 80.98.100.240
Octet1 Octet2 Octet3 Octet4
------------------------------------------------------------
80 98 100 240
0b1010000 0b1100010 0b1100100 0b11110000
0x50 0x62 0x64 0xf0
------------------------------------------------------------
Four columns, fifteen characters wide, a header column, data centered in the column.
3. Create three different variables the first variable should use all lower case characters with underscore ( _ ) as the word separator. The second variable should use all upper case characters with underscore as the word separator. The third variable should use numbers, letters, and underscore, but still be a valid variable Python variable name.
Make all three variables be strings that refer to IPv6 addresses.
Use the from future technique so that any string literals in Python2 are unicode.
compare if variable1 equals variable2
compare if variable1 is not equal to variable3
4. Create a show_version variable that contains the following
show_version = "*0 CISCO881-SEC-K9 FTX0000038X "
Remove all leading and trailing whitespace from the string.
Split the string and extract the model and serial_number from it.
Check if ‘Cisco’ is contained in the model string (ignore capitalization).
Check if ‘881’ is in the model string.
Print out both the serial number and the model.
5. You have the following three variables from the arp table of a router:
mac1 = “Internet 10.220.88.29 94 5254.abbe.5b7b ARPA FastEthernet4”
mac2 = “Internet 10.220.88.30 3 5254.ab71.e119 ARPA FastEthernet4”
mac3 = “Internet 10.220.88.32 231 5254.abc7.26aa ARPA FastEthernet4”
Process these ARP entries and print out a table of “IP ADDR” to “MAC ADDRESS” mappings. The output should look like following:
IP ADDR MAC ADDRESS
-------------------- --------------------
10.220.88.29 5254.abbe.5b7b
10.220.88.30 5254.ab71.e119
10.220.88.32 5254.abc7.26aa
Two columns, 20 characters wide, data right aligned, a header column.