Question

Classify each of the following expressions as legal or illegal. Each expression represents a call to a standard Python library function. (a) math.sqrt(4.5) (b) math.sqrt(4.5, 3.1) (c) random.rand(4) (d) random.seed() (e) random.seed(-1)

Answer 1

a) math.sqrt(4.5) is legal

The function will return the square root value of 4.5

b) math.sqrt(4.5,3.1) is illegal

The sqrt method only takes one argument as a parameter and returns its square root.

c) random.rand(4) is illegal

The random module doesn't have any funciton by the name of rand()

d) random.seed() is legal

The seed method is used to initialize the pseudorandom number generator in python.

e) random.seed(-1) is legal

Each time before calling random.random(), if we set the seed by some value, then the same number is given for that particular value every time.