Contents

  1. circle_move_repeat.py
  2. more_range_examples.py
  3. our_for_examples.py
  4. range_analysis.py
  5. simple_for.py
  6. using_range.py

circle_move_repeat.py 1/6

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# Move a circle to where the user clicked
# By CS111

from graphics import *

canvas = GraphWin("Move the Circle", 500, 500)

# create the circle in the upper left
circle = Circle( Point(50,50), 50)
circle.setFill("fuchsia")
circle.draw(canvas)

# put the directions in the top center of the canvas
directions = Text( Point(250, 20), "Click where you want to move the circle to.")
directions.draw(canvas)

for something in range(3):
    # get the info from the click
    new_point = canvas.getMouse()
    newX = new_point.getX()
    newY = new_point.getY()
    
    # need to move the circle to that point, but move requires a dx and dy...
    dx = newX - circle.getCenter().getX()
    dy = newY - circle.getCenter().getY()
    
    circle.move(dx, dy)

# wait for the mouse click
canvas.getMouse()
canvas.close()

more_range_examples.py 2/6

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# More range examples
# Sara Sprenkle

print("-------------- range(1, 15, 3) ------------")
for a in range(1,15,3):
    print(a)

print("-------------- range(5, -15, -5) ------------")
for b in range(5, -15, -5):
    print(b)

# Demonstrate these after handout ... 
    
# Won't display anything
print("-------------- range(5, -15, 5) ------------")
for counter in range(5, -15, 5):
    print(counter)

# Won't display anything
print("-------------- range(-5, 15, -5) ------------")
for counter in range(-5, 15, -5):
    print(counter)

print("-------------- range(5.5, 15, 1.5) ------------")
# Note that range expects integer values
for counter in range(5.5, 15, 1):
    print(counter)

our_for_examples.py 3/6

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# Solutions to our examples of using the for loop
# CSCI111

print("First Solution")
for x in range(1, 6, 1):
    print(x)

# Alternative
print("Second Solution")
for x in range(1, 6):
    print(x)
    
# Alternative
print("Third Solution")
for x in range(5):
    print(x+1)
    
print("Solution for problem b")
# alternatively, stop could be 12 or 13
for anything in range(2, 14, 3):
    print(anything)
    
print("Solution for problem c")
stars = "****"
for i in range(3):
    print(stars)

range_analysis.py 4/6

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# Example of for loops using range
# by Sara Sprenkle

# Question: what does range do?
for i in range(5):
    print(i)

print("After the loop:", i)

# QUESTION FOR CLASS:
# How is i changing each time through the loop?

# What happens if you change the variable from
#	i to some other variable name?

simple_for.py 5/6

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# Examples of for loops using range
# by Sara Sprenkle

# The "chorus" gets repeated 3 times
for i in range(3):
    print("You say 'hello'")
    print("And, I say 'goodbye'...")
   
print()

num_repetitions = 5

# for loop with only one statement that gets repeated.
for x in range(num_repetitions): print("Repeat the chorus!")


using_range.py 6/6

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# Examples of using range, with different numbers of parameters
# by Sara Sprenkle
#

print("------------ range(10) ------------")
for x in range(10):
    print(x)

print("----------- range(5,10) -----------")
for y in range(5, 10):
    print(y)

print("----------- range(1,10,1) -------------")
for x in range(1, 10, 1):
    print(x)

    
# What happens if step is negative?
# What happens if stop < start?

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