IT 117: Intermediate Scripting

IT 117: Intermediate Scripting
Quiz 4 Answers

Write a for loop that prints the elements in set s1.
```
for element in s1:
    print(element)
```
Write a Python expression to see if the set s1 contains 5.
```
5 in s1
```
Write a Python expression that returns the union of the sets A and B.
```
A.union(B) or B.union(A)
```
Write a Python expression that returns the intersection of the sets A and B.
```
A.intersection(B) or B.intersection(A)
```
What is the name of the module that allows you to interact with the operating system?
```
os
```
Write the Python expression you would use to get a list of all entries in your current directory.
```
os.listdir('.')
```
Write the Python statement you would use to change your current directory to your parent directory.
```
os.chdir('..')
```
What is the name of the module that allows you to interact with the Python interpreter?
```
sys
```
Write the Python expression that gives the value of the first command line argument.
```
sys.argv[1]
```
Write the Python statement you would use to stop execution of a script.
```
sys.exit()
```