Data & Digital Scholarship Tutorials

Head to Google Colaboratory

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Click New Python 3 Notebook

If you do not have this popup, click File/New Python 3 Notebook

In the first cell, type:

print('Hello, World')

Then run the snippet

Double-click the new text snippet.

Jupyter Notebooks use a syntax called Markdown (here is a good guide)

Let's use Header 2 and type Learning Python

Then a new line and type the date in bold.

Click in the code snippet to run the markdown

Click Tools/Settings

Features to note:

• Site:
  • Light/Dark theme
• Editor:
  • Indentation Length
  • Line Numbers

Create a new text snippet below and using H2 format, type Programmer Practice

Then create a new code snippet blow that

Create a new Text snippet below

In H2, type Number Adder

Then create a Code snippet below

Change x and y to accept inputs from the user.

Run the snippet, but beware for any issues!

Create an entirely new Python 3 Notebook

Name the Notebook Document Size Guesser

# My First Script

Josh Been, 11/15/2019

if:

elif:

elif:

else:

Upload to Colab
 

 - Click the little tab on the left

 - Click Files and upload the three files

Read a File

# open read connection - change to 'w' to write - change to 'a' to append

f=open('filename','r')

# read file and pass to variable

all_content=f.read()

# write: f.write(string)

# close read connection

f.close()

In a new code cell, read and print the contents of document 2

Count the number of line breaks.

Don't forget to add +1 to include the last line!

In previous code cell (with the condition statement), replace the print(Doc #) with the four lines needed to read the file and count the number of lines.

If you would like, the next tab has code you can copy/paste

Implement if and input statements to give a user two guesses

Try on your own!

OR

Copy/paste the code to the right

print('(1) Document 1')
print('(2) Document 2')
print('(3) Document 3')
doc=input('Please select document: ')
if doc=='1':
    f=open('document1.txt','r')
    contents=f.read()
    f.close()
    lines_count = contents.count('\n')+1
elif doc=='2':
    f=open('document2.txt','r')
    contents=f.read()
    f.close()
    lines_count = contents.count('\n')+1
elif doc=='3':
    f=open('document3.txt','r')
    contents=f.read()
    f.close()
    lines_count = contents.count('\n')+1
else:
    print('Try again')

first_guess=float(input('How many lines do you guess?'))
if first_guess == lines_count:
    print('Correct!')
else:
    if first_guess<lines_count:
        print('Too Low')
    else:
        print('Too High')
    second_guess=float(input('How many lines do you guess? '))
    if second_guess == lines_count:
        print('Correct!')
    else:
        print('Sorry, You Lose! ')

A function is a reusable piece of code that can repeatedly accept variables and return variables.

To define a function, use:

def function_name(variable_name):

    do something with variable_name

    return a_variable

To call a function, use:

function_name(variable_name)

Let's create a function that accepts a number, and returns the number +1

A List is a simple list of values. Lists are denoted using the square brackets.

Items can be added to lists using the append command.

copy/paste:

my_list=['red', 'orange', 'yellow', 'green', 'blue', 'indigo']

Different from for loops, while loops will run indefinitely while the expression is true.

Careful! - It is possible to create infinite loops using while

line_count = 1000
guess = 0  # needed to intialize guess
attempts=0

while guess!=line_count:
    attempts=attempts+1
    guess=float(input('Guess? '))
    if guess<line_count:
        print('Too Low!')
    elif guess>line_count:
        print('Too High!')

print('You guessed it in', attempts, 'guesses!')