A Smarter Way to Learn Python - Chapter 77 Exercises

To give the user another chance to input a filename after a FileNotFoundError, you use a _______ ________. (2 words)

while loop

^ *while loop *$

If there's no error, you end the loop with a _______ statement.

break

^ *break *$

Code the line that precedes a try that allows the user to try again.

while True:

while `True`:

Code the next line. Indent correctly.

while True:

try:

Code the first three lines, beginning with the while statement. The third line tests whether a is less than b. Pay attention to indents.

while True:
try:
if a < b:

^ *while True:\n try:\n if a < b: *$

Code the first four lines, beginning with the while statement. The third line tests whether a divided by b has a remainder of 0. If so, display a message. Make up the message. Pay attention to indents.

while True:
  try:
    if a % b == 0:
      print("No remainder")

^ *while True:\n try:\n if a % b == 0:\n print$•.+•$ *$

The next line interrupts the loop if the test passes. Code it.

while True:
  try:
    if a % b == 0:
      print("No remainder")

break

^ * break *$

The next line deals with the error if the file isn't found. Code it.

while True:
  try:
    if a % b == 0:
      print("No remainder")
    break

except FileNotFoundError:

^ * except FileNotFoundError: *$

The next line displays a message if there's an error. Code it.

while True:
  try:
    if a % b == 0:
      print("No remainder")
      break
  except FileNotFoundError:

print("Could not find the file. Please try again.")

^ * print$•.+•$ *$

In the example that we've been using, type the two lines of code, on separate lines, that are indented one tab. Indent them.

try:
except FileNotFoundError:

^ * try:\n except FileNotFoundError: *$

In IDLE code a Python program that asks the user to input a file name, using a while loop to give her another chance to input if there's a FileNotFoundError.
If the file is found, load it. If the file isn't found, display a message.
Save the Python program to the Desktop and run it.
As the user, input a filename for a file that doesn't exist. Then input a filename for a file that does exist.

A Smarter Way to Learn Python / Chapter 77 Exercises

You did it!

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