Homework 1a: Writing Python | Introduction to Python Programming

 

Introduction to Python Programming
University of Pennsylvania

Homework 1a : Instructions

Homework 1a: Writing Python

This assignment is designed to give you practice writing code and applying lessons and topics for the current module.

This assignment deals with the following topics:

• Math

• Data types

• Strings

The Assignment

This assignment is designed to give you practice writing Python and using Jupyter Notebook.

Math Practice

In [2]:

#########################################################

### EXECUTE THIS CELL BEFORE YOU  TEST YOUR SOLUTIONS ###

#########################################################

​

import imp

sol = imp.load_compiled("sol", "./sol.py")

from nose.tools import assert_equal

A note on variable initialization

Variable initialization refers to the act of declaring a variable (giving it a name) and assigning it a value. A variable's name is declared on the left side of the = and its value on the right side. This can be done in a single line of code, like the below. Note that a variable's name may not contain spaces or special characters, with the exception of the underscore _.

my_variable = 1

Once initialized, referring to my_variable in subsequent lines of code will actually refer to my_variable's value, which has been set to 1. However, as their name implies, variables can have changing values. For example, we might do something like the below:

my_variable = 1
print(my_variable)     # This will print out the value of my_variable
# >>> 1

my_variable = 1 * 2    # We've now changed the value of my_variable to be (1 * 2) = 2
print(my_variable)
# >>> 2

We can also reference a variable's current value in it's own re-assignment! This can be done if the variable has already been assigned a value previously. For example:

my_variable = my_variable * 3
print(my_variable)
# >>> 6

What the above line is doing is setting the value of my_variable equal to the current value of my_variable, which we set to 2, multiplied by 3. This ends up being: my_variable = 2 * 3 = 6

Calculate the result of 3.93 multiplied by 4901 and save it in a variable named 'q1', then print it out.

In [3]:

# your code here

q1=3.93*4901

​

print(q1)

19260.93

In [4]:

##########################

### TEST YOUR SOLUTION ###

##########################

# Note: All test cases are read-only

​

assert_equal(q1, sol.q1)

print("Success!")

Success!

Calculate the result of 215 divided by 6 and save it in a variable named 'q2', then print it out.

In [5]:

# your code here

q2=215/6

print(q2)

35.833333333333336

In [6]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q2, sol.q2)

print("Success!")

Success!

Calculate the result of 3 divided by 0.3 and save it in a variable named 'q3', then print it out.

In [7]:

# your code here

q3=3/0.3

​

print(q3)

10.0

In [8]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q3, sol.q3)

print("Success!")

Success!

Calculate the remainder of 215 divided by 6 and save it in a variable named 'q4', then print it out.

In [9]:

# your code here

q4=215%6

print(q4)

5

In [10]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q4, sol.q4)

print("Success!")

Success!

Calculate the value of 9 raised to the 12th power and save it in a variable named 'q5', then print it out.

In [11]:

# your code here

q5=9**12

print(q5)

282429536481

In [12]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q5, sol.q5)

print("Success!")

Success!

Cast 3.5 to an integer and save it in a variable named 'q6', then print it out.

In [14]:

# your code here

q6=int(3.5)

print(q6)

3

In [15]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q6, sol.q6)

print("Success!")

Success!

Data Types Practice

Calculate the data type of "False" (notice the quotes around the word False!) and save it in a variable named 'q7', then print it out.

In [18]:

# your code here

q7=type("False")

print(q7)

<class 'str'>

In [19]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q7, sol.q7)

print("Success!")

Success!

Calculate the data type of True and save it in a variable named 'q8', then print it out.

In [20]:

# your code here

q8=type(True)

​

print(q8)

<class 'bool'>

In [21]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q8, sol.q8)

print("Success!")

Success!

Calculate the data type of the result of 1000 divided by 10 and save it in a variable named 'q9', then print it out.

In [22]:

# your code here

q9=type(1000/10)

print(q9)

<class 'float'>

In [23]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q9, sol.q9)

print("Success!")

Success!

Cast the value of 6.3 divided by 3.8 to an integer. Save it in a variable named 'q10', then print it out.

In [24]:

# your code here

q10=int(6.3/3.8)

print(q10)

1

In [25]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q10, sol.q10)

print("Success!")

Success!

String Practice

Concatenate the strings 'James', 'Brian', and 'Patrick' - store the result in a variable called 'q11', then print it out. Make sure to add a single empty space between the names!

In [26]:

# your code here

a='James '

b='Brian '

c='Patrick'

q11=a+b+c

print(q11)

James Brian Patrick

In [27]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q11, sol.q11)

print("Success!")

Success!

Make the following string correct, storing it in a variable named 'q12':
q12 = "4 % 2 = " + (4 % 2))

In [28]:

# your code here

q12 = "4 % 2 = " + str(4 % 2)

print(q12)

4 % 2 = 0

In [29]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q12, sol.q12)

print("Success!")

Success!

Save the following quote, (including the double quotes), in a variable called 'q13', then print it:
Albert Einstein's best quote is "I have no special talent. I am only passionately curious."

In [30]:

# your code here

q13=("Albert Einstein's best quote is \"I have no special talent. I am only passionately curious.\"")

print(q13)

Albert Einstein's best quote is "I have no special talent. I am only passionately curious."

In [31]:

##########################

### TEST YOUR SOLUTION ###

##########################

​

assert_equal(q13, sol.q13)

print("Success!")

Success!