Error & Exception Handling

Question 1

break (def + ex.)

continue (def + ex.)

pass (def + ex.)

try / except pass

Answer 1

utilized within loops for additional functionality

( 1 )

break: breaks out of the closest enclosing loop

n_string = “sammy”

for letter in n_string:

if letter == ‘a’ :

break

print ( letter )

returns only s then stops running

( 2 )

continue: goes to the top of the closest enclosing loop

n_string = “sammy”

for letter in n_string:

if letter == ‘a’ :

continue

print ( letter )

returns all letters except a in sammy

( 3 )

pass: does nothing, used to create empty functions for later use

( 4 )

try / except pass: skips to the next iteration

Question 2

Error & Exception Handling Purpose

&

Statement Componenets

(4)

(not all have to be used)

&

Example

Answer 2

Purpose:

allows the script to continue if a user or another programmer executes the code in an unintended way raising an error or exception, used as a wrapper for statements

Statement Components:

try: the attempted block of code

except: block of code allowing executing if an error occurs

else: if no error or execption occurs execute this statement

finally: block of code to be executed, regardless of an error

Example:

def divide(x,y):

try:

result = x // y # floor division

except:

print(“Sorry ! You are dividing by zero”)

finally:

print(“Code that will always execute”)

Question 3

EOL (end of line)

Answer 3

syntax error: interpreter expected a character at the end of a string literal, but one was not found

Question 4

EOF (end of file)

Answer 4

syntax error: a function hits the end of the file without reading data

Question 5

Leading Zero Error

Answer 5

leading zeros are not allowed for integer literals, because of ambiguity. They are are used for hex (0x), octals (0o), and binaries (0b).

Question 6

Syntax Error

Answer 6

error referring to the structure of the script ex. non closed parenthesis

Question 7

Runtime Error or Exceptions

Answer 7

defects that manifest only at runtime an interruption that occurs at runtime, forcing the program to stop execution

Question 8

Semantic Error

Answer 8

statement is syntactically valid, but the code does not do what the programmer intended

Question 9

Type Error

Answer 9

raised when operation or function is applied to an object of inappropriate type (adding a string and integer together)

Question 10

OSError

(Definition)

Answer 10

class of built in errors that are invoked when a system related error occurs

there are 15 subclasses of errors that can be invoked depending on the specific error raised (look to python documentation for the list)