w4

Question 1

how are modules imported code

Answer 1

“import ‘module name’”

Question 2

what is a module

Answer 2

file of python code

Question 3

what must modules be documented with

Answer 3

docstrings

Question 4

whats a docstring

Answer 4

used to describe the purpose and functionality of a specific code

Question 5

whats the name of the module when its imported

Answer 5

__name__

Question 6

whats the name of the module when its run as the main program

Answer 6

__main__

Question 7

whats a namespace

Answer 7

a dictionary of names

Question 8

when must default parameters be known

Answer 8

when def statement is executed

Question 9

what do variable parameters allow

Answer 9

allows functions to be called with any number of arguments

Question 10

2 reasons for writing functions

Answer 10

• make code easier to understand
• to make code reusable

Question 11

2 types of functions

Answer 11

procedures and real functions

Question 12

what’s the 3 diff between procedures and real functions

Answer 12

procedures don’t return value to caller (return statement) whilst real function have a return statement

procedures do print output but real functions don’t print output (they write files)

procedure names start with verbs “print”, “compute”
real function names start with nouns
“standard”, “noun”

Question 13

3 ways functions arise

Answer 13

deliberately through design
during refactoring, when cleaning up a code
by discovery

Question 14

what are global variables and where can they be in relation to functions

Answer 14

these are variables created outside a function and
can be both inside and outside of functions

Question 15

what are local variables and where can they be in relation to functions

Answer 15

these a variables that are created inside functions
can only be accessed inside the function

Question 16

x = min(7,14,50)

Answer 16

finds the minimum value of the iterable

Question 17

x = abs(-7.55573)

Answer 17

finds the absolute (positive) value of the specified number

Question 18

x = round(-10.355,2)

Answer 18

will round number to digits specified, in this case 2

Question 19

y = pow(2,3,3)

Answer 19

returns the value of x to the power of y, the last digit is known as the mod (modulus) which is the remainder

Question 20

y = sum(2,7,84)

Answer 20

returns the sum of all the numbers in the iterable

Question 21

math.ceil()

Answer 21

rounds a number upwards to its nearest integer

Question 22

math.floor()

Answer 22

rounds a number downwards to its nearest integer

Question 23

math.pi

Answer 23

returns pi