webinar-functions-2021-10-09--v4.py

# Webinar: Functions + Methods in Python...

# You'll start getting to know functions in Ch 7

# functions should be modular and reusable
# we define a function once and call it as many times as needed

def myFunction(parameter):
    # don't do this:
    # parameter = 5 # no!
    print(someValue) # or
    return someValue

# return and print() are different

# function definition, Gallant
def squareThis(num):
    # square = num * num
    # return square
    return num * num

# squareThis(3)
print(squareThis(3)) # 9
print(squareThis(5)) # 25
x = squareThis(8)
print(x) # 64

# function definition, Goofus
def squareSomething(num):
    num = 5 # no, Goofus! Don't override your parameter!
    return num * num

print("Goofus:")
print(squareSomething(3)) # Goofus hopes you like 25
print(squareSomething(6)) # on every...
print(squareSomething(9)) # single call :(

# help(str)
print(dir(list)) # returns a list
help(list.append) # append() is a list METHOD, a function particular to that type

for item in dir(list): # dir() returns a list, so I can treat a call to dir() as a list
    if not item.startswith("__"):
        print(item)

# Ch 8 Task 1
# Complete the function to print the first X
# number of characters in the given string
def printFirst(mystring, x):
    print(mystring[0:x])
# expected output: WGU
printFirst('WGU College of IT', 3)
# expected output: WGU College
printFirst('WGU College of IT', 11)
# expected output: WKRP
printFirst("WKRP in Cincinnati", 4)

# The new LABS are your best preparation for the new Pre and OA!
# We looked at Lab 24.3...

# Define your function here -- ABOVE THE IF STATEMENT that checks the script name
def seconds_to_jiffies(user_seconds):  # probably safe to change parameter name, but not function name!
    return user_seconds * 100

if __name__ == '__main__':
    # Type your code here. Your code must call the function.
    # help(list) # help() and dir() work on Labs and test system!
    # (but don't leave those calls in your finished code)
    user_input = float(input())
    num_jiffies = seconds_to_jiffies(user_input)  # user_input isn't the PARAMETER, it's an ARGUMENT
    # seconds_to_jiffies(5) # here 5 would be the argument
    print('{:.2f}'.format(num_jiffies))

    # btw, I would probably have just written all of that like this:

    # print('{:.2f}'.format(seconds_to_jiffies(float(input()))))

    # ... but no harm at all in breaking it out into more lines!
    # If it helps to see it step by step, then do it step by step!