The exercises below should be completed using the interactive Python interpreter. You are expected to have installed the Anaconda Python distribution (version 3.6).
On Windows, click Start -> Anaconda3 -> Anaconda Prompt, then type python at
the prompt to start the interpreter.
On Mac, open a Terminal window and type python at the prompt.
When is there a difference between using an integer value (no decimal) and the decimal equivalent of a number? For example 3 and 3.0. Play around with some common math operations to test it out.
Add 0.1 + 0.2. What's going on?
See http://introtopython.org/var_string_num.html#Floating-Point-numbers for more information.
If you run the code below, what will the output be? Figure it out before running it.
>>> a = 1
>>> b = a + 2
>>> a = 2
>>> print(b)If you run the code below, what will the output be? Figure it out before running it.
>>> first, second = 'Grace', 'Hopper'
>>> third, fourth = second, first
>>> print(third, fourth)If you don't know who Grace Hopper is, take a look.
Store your first name in a variable. Store your last name in a different variable. Combine (concatenate) them to make a single string.
You can index and slice strings. Print the first and last letters of your first name variable from above.
Make a list called words that has 10 words of your choice in it.
Print the first and last elements of the list. Then the first two elements as a subset of the list.
Add two words to the end of your list, then print it out.
Challenge: Add two words to the beginning of your list, then print it out.
Now remove the words you added to your list, and print it out again.
Print every other word in your words list starting with the second one.
Challenge: Print your list in reverse order without changing the order of the list permanently.
You can have nested lists. Create a list that has two other lists as its
elements. Save it in a variable called nested_list.
Print the first list from nested_list. Then print the second element of the
first list.
You write software for Porta-Party, a company that coordinates car pools for ride sharing. You have been asked to calculate how many unassigned seats there are in the car pool, so the Porta-Party app knows how many people can still sign up for rides.
- There are 14 cars in the car pool.
- Each car has 4 seats.
- One seat in each car is given to a driver, and is not available for ride-sharing.
- 28 users have signed-up for rides in the Porta-Party car pool.
Calculate the available seats for ride-sharing customers in the Porta-Party
using variables you've assigned, such as available_cars, seats_per_car,
drivers_per_car, etc.
How many users can ride in the car pool? With 28 users signed up, how many more users can sign-up for a ride?
Print the results. Include an if/else statement to print out either "Yes, you can sign up for the car pool!" or "No room in the porta-party!" depending on how many users have signed-up for a ride.
Change the number of users signed up so you can see each possibility printed.
As an employee of Porta-Party, you are required to drive one of the car-pool cars. Three users have signed up to be in your car-pool car.
Create a list with their three names (pick any three names, like Janna). Using the list to access the names, print out a welcome message to each person, capitalizing their name ("Welcome to the car pool, JANNA")
Use the len() function on the list to find out how many items are in the list.
Now use the len() function on each of the names on the list to figure out how
many letters each name contains.
Using len(), calculate the average name length of the members of your car
pool.
Fix the errors in the code below.
2010data = [3,5,7,9,11]
print("The first 2010 data value is "+2010data[0])
mycolors = ["red","green","blue",["purple","pink","teal"]]
# make the sentence below make sense with values from mycolors above
print(mycolors[1]+" and "mycolors[3]+" mix to make "+mycolors[4])
my_list=("apples","bananas","pears)
print(mylist)
my_list[0] = "avocado"
print(my_list)