DevNet_Python.py

# ==================================================================================================
# This is my DevNet Express Intro to Python Exercise suite.
# Select Corresponding Exercise number or type Exit to quit.
# The simple Exercises are inline, while some of the more-complex ones are in Functions
# --------------------------------------------------------------------------------------------------
#
NumExercises = 18

# ==================================================================================================
# MathFun(radius) - 
# --------------------------------------------------------------------------------------------------
#
def MathFun(Rad):
 from math import pi
 RadSquare = Rad ** 2
 return (pi*RadSquare, RadSquare)

# ==================================================================================================
# my_function() - 
# --------------------------------------------------------------------------------------------------
#
def my_function():
 pass

# ==================================================================================================
# my_function1(cnt) - 
# --------------------------------------------------------------------------------------------------
#
def my_function1(cnt):
 print("My last count was: ",cnt)

# ==================================================================================================
# my_function2(cnt) - 
# --------------------------------------------------------------------------------------------------
#
def my_function2(cnt):
 import math
 return(math.pi * cnt)
# ==================================================================================================
# my_function2(cnt) - 
# --------------------------------------------------------------------------------------------------
#
def scopeFun(x):
 x += 5
 print("scopeFun: x = ", x)
 return()

# ==================================================================================================
# scopeGlob() - 
# --------------------------------------------------------------------------------------------------
#
def scopeGlob():
 global x
 x += 5
 print("scopeGlob: x = ", x)
 return()

# ==================================================================================================
# main() - Infinite loop. Type "Exit" to quit.
# --------------------------------------------------------------------------------------------------
#
InputString = "Enter Exercise Number (1-" + str(NumExercises) + ") or 'Exit': "
while True:
 Response = str(input(InputString))
 if Response == "EXIT" or Response == "Exit" or Response == "exit" or Response == "E" or Response =="e":
 break
 elif Response == "1":
 # Introduction to Python Exercise-1
 # Classic "Hello World" and two variants showing formatting and quotes
 print ("Hello World!")
 print()
 print ('Hello World! \tHow are you?')
 print()
 print ("Hello World! \nHow's it going?")
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "2":
 # Introduction to Python Exercise-2
 # Variable assignments: Integer verses Strings - The second print returns an error
 myvar = 10
 print (myvar + 1)
 print()
 myvar = "10"
 #print (myvar + 1)
 # The next statement wouldn't happen because of the error in the previous line
 print (myvar + "1")
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "3":
 # Introduction to Python Exercize-3
 # Comments & fomatting for reading + Intro to Conditionals and Indentation
 # This is a comment and blank spaces make code readable 

 print()
 print ("Helloworld!")
 num = 1
 if num < 1:
 print ("I'm less than 1!")
 print ("Goodbye Cruel World!")
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "4":
 # Introduction to Python Exercize-4
 # Extend previous example to include conditionals for "elif" and "else"
 print ("Helloworld!")
 num = 1
 if num < 1:
 print ("I'm less than 1!")
 print ("Cruel World!")
 elif num == 1:
 print ("I’m equal to 1!")
 else:
 print ("I’m greater than 1! ")
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "5":
 # Introduction to Python Exercize-5
 # Building on Exercise 4. Adding input from the user. Note: This will return an error
 print ("Helloworld!")
 num = 1
 num = input("Input a number: ")
 if num < 1:
 # The next statements won't happen because of the error in the previous line
 print ("I'm less than 1!")
 print ("Cruel World!")
 elif num == 1:
 print ("I’m equal to 1!")
 else:
 print ("I’m greater than 1! ")
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "6":
 # Introduction to Python Exercize-6
 # Correcting the Error in Exercise #5
 print ("Helloworld!")
 num = 1
 num = int(input("Input a number: "))
 if num < 1:
 print ("I'm less than 1!")
 print ("Cruel World!")
 elif num == 1:
 print ("I’m equal to 1!")
 else:
 print ("I’m greater than 1! ")
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "7":
 # Introduction to Python Exercize-7
 # Correcting the Error in Exercise #5
 print ("Helloworld!")
 num = 1
 num = int(input("Input a number: "))
 if num < 1:
 print ("I'm less than 1!")
 print ("Goodby Cruel World!")
 elif num == 1:
 print ("I’m equal to 1!")
 else:
 print ("Value is: " + str(num))
 print ("Value is: ", num)
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "8":
 # Introduction to Python Exercize-8
 # Iteration using For Statement
 num = 1
 
 for count in range(3):
 num = int(input("Input a number: "))
 if num < 1:
 print ("I'm less than 1!")
 print ("Goodby Cruel World!")
 elif num == 1:
 print ("I’m equal to 1!")
 else:
 print ("Value is: " + str(num))
 print ("Value is: ", num)
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "9":
 # Introduction to Python Exercize-9
 # Iteration using While Statement
 num = 1

 while num > 0:
 num = int(input("Input a number: "))
 if num < 1:
 print ("I'm less than 1!")
 print ("Goodby Cruel World!")
 elif num == 1:
 print ("I’m equal to 1!")
 else:
 print ("Value is: " + str(num))
 print ("Value is: ", num)
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "10":
 # Introduction to Python Exercize-10
 # Manipulating lists
 print ("MyList Example\n")
 MyList = []
 print (len(MyList), MyList)
 MyList = ['Fred', "Barney", 3, 5.5]
 print (len(MyList), MyList) 
 print()
 MyList.append("Wilma")
 MyList.append("Betty")
 print (len(MyList), MyList) 
 print()
 MyList.remove(3)
 MyList[2] = MyList[1]
 MyList[1] = MyList[3]
 MyList[3] = MyList[4]
 MyList.remove(MyList[3])
 print (len(MyList), MyList)
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "11":
 # Introduction to Python Exercize-11
 # Manipulating lists - Advanced
 MyList1 = ["Alpha", "Beta", "Gamma", "Delta", "Episilon", "Ztea", "Eta", "Theta", "Iota"]
 MyList2 = MyList1[1:3]
 MyList3 = MyList1[:3]
 MyList4 = MyList1[3:]
 MyList5 = MyList1[:]
 print ("MyList1 Length:", len(MyList1), MyList1, id(MyList1))
 print ("MyList2 Length:", len(MyList2), MyList2, id(MyList2))
 print ("MyList3 Length:", len(MyList3), MyList3, id(MyList3))
 print ("MyList4 Length:", len(MyList4), MyList4, id(MyList4))
 print ("MyList5 Length:", len(MyList5), MyList5, id(MyList5))
 print()
 MyList1 = ["Alpha", "Beta", "Gamma"]
 MyList2 = MyList1
 print (len(MyList1), MyList1)
 print (len(MyList2), MyList2)
 MyList1.append("Delta")
 MyList2.append("Episilon")
 print (len(MyList1), MyList1, id(MyList1))
 print (len(MyList2), MyList2, id(MyList2))
 print()
 MyList2 = list(MyList1)
 print (len(MyList1), MyList1, id(MyList1))
 print (len(MyList2), MyList2, id(MyList2))
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "12":
 # Introduction to Python Exercize-12
 # Manipulating lists in lists - Advanced
 MyList = [["red",[255,0,0]],["green",[0,255,0]],["blue",[0,0,255]],["yellow",[255,255,102]]]
 for i in range(len(MyList)):
 print (MyList[i][0],end="")
 for j in range(len(MyList[i][1])):
 print ("\t",MyList[i][1][j])
 print()
 import numpy as np
 aList = np.arange(8)
 print ('Starting with an 8-element array:')
 print (aList)
 bList = aList.reshape(4,2)
 print ('\nReshaped to a 4x2 array:')
 print (bList,"\n")
 print()
 aList = np.arange(9)
 print ('Starting with a 9-element array:')
 print (aList)
 bList = aList.reshape(3,3)
 print ('\nReshaped to a 3x3 array:')
 print (bList,"\n")
 print()
 # Other ways to initialize a list
 print("Creating Initialized lists with numpy.")
 aList = np.zeros(7)
 bList = np.ones(7)
 print("List of zeros: ",aList)
 print("List of ones: ",bList)
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "13":
 # Introduction to Python Exercize-13
 # Manipulating Tuples in Python
 print("\nMy Tuple Example:")
 MyTuple = ()
 print (len(MyTuple), MyTuple)
 MyTuple = ("Bldg5", "Switch01", "1/0/1", 20)
 print (len(MyTuple), MyTuple)
 MyTuple1 = ("Bldg5", "Switch02", "1/0/1", 5)
 print (len(MyTuple1), MyTuple1)
 print (MyTuple[1],"GigE",MyTuple[2]," in ",MyTuple[0]," has ", MyTuple[3]-MyTuple1[3], "more errors than ",MyTuple1[1])
 print()
 for i in range(len(MyTuple)):
 print (MyTuple[i])
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "14":
 # Introduction to Python Exercize-14
 # List of Tuples
 print("\nMy Tuple Example:")
 MyTuple = ()
 print (len(MyTuple), MyTuple)
 MyTuple = ("Bldg5", "Switch01", "1/0/1", 20)
 print (len(MyTuple), MyTuple)
 MyTuple1 = ("Bldg5", "Switch02", "1/0/1", 5)
 print (len(MyTuple1), MyTuple1)
 print (MyTuple[1],"GigE",MyTuple[2]," in ",MyTuple[0]," has ",
 MyTuple[3]-MyTuple1[3],
 "more errors than ",MyTuple1[1])
 print()
 IntList = []
 IntList.append(MyTuple)
 IntList.append(MyTuple1)
 print (len(IntList), IntList)
 print (IntList[1][1])
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "15":
 print("\nMy Dictionary Example:")
 for count in range(5):
 my_function()
 print(count)
 print()
 MyD = {"Type":"Cat9K","Ports":48,"Name":"Switch1","Loc":"Building 5"}
 print (len(MyD), MyD)
 print()
 print (MyD["Name"]," in ", MyD["Loc"]," is a ", MyD["Type"])
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "16":
 print("\nmy_function() Examples:")
 for count in range(5):
 my_function()
 print("My Count ",count)
 print()
 for count in range(5):
 my_function1(count)
 print()
 for count in range(5):
 npi = my_function2(count)
 print (count, "times PI = ", npi)
 print()
 x = 5
 scopeFun(x)
 print("Main(): x = ", x)
 print()
 scopeGlob()
 print("Main(): x = ", x)
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "17":
 r = int(input("Input the radius of a circle: "))
 prs, rs = MathFun(r)
 print("Radius = ", r, "\tr^2 = ", rs, "\tThe area of the circle is = ", prs)
 print("\n=======(",Response, ")=======\n")
 
 elif Response =="18":
 food={"vegetables":["carrots","kale","cucumber","tomato"]}
 for veg in food["vegetables"]:
 print(veg)
 print()
 cars={"sports":{"Turbo 911":"Porsche","Viper":"Dodge","Corvette":"Chevy"}}
 for auto in cars["sports"]:
 print(auto, cars["sports"][auto])
 print()
 Devices={"WLC":"5520","Switch":"Nexus9k","Router":"ISR4221"}
 for var in Devices:
 print("Device: " + var + " Model " + Devices[var])
 print()
 myvar={"switches":{"fixed":["2900","3650","3850","9300","9500"]}}
 print(myvar["switches"]["fixed"][0])
 print("My list of access switches are:", end=" ")
 for f in myvar["switches"]["fixed"]:
 print(f, end=" ")
 print()
 myvar={"type":"donut","flavors":{"flavor":[{"type":"chocolate","id":1001},{"type":"glazed","id":1002},{"type":"sprinkled","id":1003}]}}
 print("Id: " + str(myvar[flavors][flavor][0]["id"]) + " type " + myvar[flavors][flavor][0]["type"]) 
 for f in myvar[flavors][flavor]:
 print("Id is: " + str(f["id"]) + " type is: " + f["type"])
 print("\n=======(",Response, ")=======\n")
 
 elif Response == "19":
 
 print("\n=======(",Response, ")=======\n")
 elif Response =="20":
 import pip
 installed_packages = pip.get_installed_distributions()
 installed_packages_list = sorted(["%s==%s" % (i.key, i.version)
 for i in installed_packages])
 print(installed_packages_list)
 print("\n=======(",Response, ")=======\n")
 else:
 print ("Unrecognized Exercize Number. Value must be in range (1-",NumExercises,").")
 print("\n=======(",Response, ")=======\n")