Exercises 12-20 lp3thw

python/lp3thw/Exercise13/ex13.py

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+from sys import argv
+
+script, first, second, third = argv
+
+print("The script is called: ", script)
+print(f"The first variable was: {first}")
+print(f"The second variable was: {second}\nThe third variable was : {third}")
+
+#To run this script you must call it from the terminal via - python ex13.py Arg1 Arg2 Arg3

python/lp3thw/Exercise14/ex14.py

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+#!/bin/python3
+
+from sys import argv
+
+script, userName, likeLevel = argv
+prompt = "Well? - "
+
+print(f"Hi {userName}, I'm the {script} script")
+print("I'd like to ask you a few questions: ")
+print(f"Do you like me {userName}")
+likes = input(prompt)
+print(f"Where you live {userName}?")
+lives = input(prompt)
+print(f"What kind of Computer do you have?")
+computer = input(prompt)
+print(f"""
+Alright, so you said {likes} about liking me.
+Your likeness level was {likeLevel}.  What did i do?
+You reside in {lives}. Where is that exactly?
+And you have a {computer} computer.
+""")

python/lp3thw/Exercise15/ex15.py

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+from sys import argv
+
+script, filename = argv
+
+txt = open(filename)
+
+print(f"Here's your file {filename}")
+print(txt.read())
+
+print("Type the filename again: ")
+fileAgain = input("> ")
+
+txtAgain = open(fileAgain)
+
+print(txtAgain.read())
+#It seems that you can only have one active file stream open at a time.  So in order to print the txt variable, we would need to redefine it.
+#txt = open(filename)
+#print(txt.read())

python/lp3thw/Exercise16/ex16.py

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+from sys import argv
+
+script, filename = argv
+
+print(f"We're going to erase {filename}.")
+print("If you want to cancel, HIT CTRL-C (^C) NOW!!!")
+print("If you want to proceed, hit Enter")
+
+input("?")
+
+print(f"Opening the file...{filename}")
+target = open(filename, 'a')
+#https://docs.python.org/3/library/functions.html#open documentation on open()
+
+#print("Truncating the file. Goodbye!")
+#target.truncate()
+
+print("Now I'm going to ask you a write a few lines: ")
+
+Q1 = input("Line 1: ")
+Q2 = input("Line 2: ")
+Q3 = input("Line 3: ")
+
+print(f"Now I'll write the 3 lines to {filename}")
+
+allQ = Q1 + "\n" + Q2 + "\n" + Q3 + "\n"
+target.write(allQ)
+#target.write("\n")
+#target.write(Q2)
+#target.write("\n")
+#target.write(Q3)
+#target.write("\n")
+
+print(f"Finished writing, closing {filename}.")
+target.close()

python/lp3thw/Exercise17/ex17.py

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+from sys import argv
+from os.path import exists
+
+script, fromFile, toFile = argv
+
+print(f"Copying from {fromFile} into {toFile}")
+
+inFile = open(fromFile)
+inData = inFile.read()
+
+print(f"The input file is {len(inData)} bytes long.")
+
+print(f"Does the output file exist? {exists(toFile)}")
+print("Ready? hit RETURN to continue - ")
+
+input(" ------ ")
+
+outFile = open(toFile, "w") #use mode to so we make sure its a clean copy.  Erases the file on opening
+outFile.write(inData)
+
+outFile.close()
+inFile.close()

python/lp3thw/Exercise18/ex18.py

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+def printTwo(*args):
+    arg1, arg2 = args
+    print(f"arg1: {arg1}, arg2: {arg2}")
+
+def printTwoAgain(arg1, arg2):
+    print(f"arg1: {arg1}. arg2: {arg2}")
+
+def printOne(arg1):
+    print(f"arg1: {arg1}")
+
+def printNone():
+    print("No arguments here")
+
+printTwo("Ganome", "Mary")
+printTwoAgain("Ganome", "Mary")
+printOne("Single Argument")
+printNone()
+

python/lp3thw/Exercise19/ex19.py

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+def cheeseAndCrackers(cheeseCount, boxesOfCrackers):
+    print(f"You have {cheeseCount} cheeses!")
+    print(f"You have {boxesOfCrackers} boxes of crackers")
+    print("Man thats enough for a party!")
+    print("Get a blanket!\n")
+
+print("We can just give the function numbers directly")
+cheeseAndCrackers(20, 30)
+
+print("OR, we can use variables from our script:")
+
+amountOfCheeses = 10
+amountOfCrackers = 50
+
+cheeseAndCrackers(amountOfCheeses, amountOfCrackers)
+
+print("We can even do the math inside:")
+cheeseAndCrackers(6 * 5, 24 + 16)
+
+print("And we can combine the two, variables and math:")
+cheeseAndCrackers(amountOfCheeses + 32,amountOfCrackers + 5 * 4)

python/lp3thw/Exercise20/ex20.py

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+from sys import argv
+
+script, inputFile = argv
+
+def printAll(f):
+    print(f.read())
+
+def rewind(f):
+    f.seek(0)
+
+def printALine(lineCount, f):
+    #print(lineCount, f.readline())  #THIS METHOD INCLUDES THE LINE NUMBER!!!
+    print(f.readline())
+
+currentFile = open(inputFile)
+
+print("First let's print the whole file: \n")
+printAll(currentFile)
+
+print("Now let's rewind. Kind of like a tape.")
+
+rewind(currentFile)
+
+print("Let's print three lines:")
+
+currentLine = 1
+printALine(currentLine, currentFile)
+
+currentLine += 1
+printALine(currentLine, currentFile)
+
+currentLine = currentLine + 1 #THIS is identical to the line above!
+printALine(currentLine, currentFile)