IT 117: Intermediate Scripting

IT 117: Intermediate Scripting
Quiz 3 Answers

Can the key in a dictionary entry be any data type?

no. you can only use values that are immutable, that cannot be changed

What string value does Python think of as False in an if statement?
```
the empty string
```
What string value does Python think of as True in an if statement?
```
anything that is not the empty string
```
What integer value does Python think of as True in an if statement?
```
anything other than 0
```
Can a value appear more than once in a set?
```
no
```
If we have the sets A and B with the elements below, what are the elements formed by the union of A and B?
```
A = {1, 2, 3}
B = {3, 4, 5}
```
```
{1, 2, 3, 4, 5}
```
If we have the sets A and B with the elements below, what are the elements formed by the intersection of A and B?
```
A = {1, 2, 3}
B = {3, 4, 5}
```
```
{3}
```
Write the Python statement to create an empty set named s1.
```
s1 = set()
```
Write a Python statement to create the set s2 containing the values 1, 2 and 3, using a set literal.
```
s2 = {1, 2, 3}
```
Write a statement that adds 5 to the set s1.
```
s1.add(5)
```