IT 117: Intermediate Scripting - Answers to Class 6 Ungraded Quiz

IT 117: Intermediate to Scripting
Answers to Class 6 Ungraded Quiz

If I wanted to add the email address 'dave.souza@gmail.com' to the dictionary emails using the key 'Dave', what Python statement would I write?
```
emails['Dave'] = 'dave.souza@gmail.com'
```
What is the length of an empty dictionary?
```
0
```
Write the Python statement to create an entry in the students dictionary for a student with student ID '0123456' whose name is 'John Smith'.
```
students['0123456'] = 'John Smith'
```
Write the Python expression you would use to test whether the students dictionary contains an entry for a student with the ID '0123456'.
```
'0123456' in students
```
Write the Python expression you would use to test whether the students dictionary DOES NOT contain an entry for a student with the ID '0123456'.
```
'0123456' not in students
```
Write the Python statement you would use to delete the entry in the students dictionary with key value '0123456'.
```
del students['0123456']
```
What would happen if you tried to delete a dictionary entry using a key that was NOT in the dictionary?
```
you would get a KeyError exception
```

What does the length of a dictionary mean?

the number of key - value pairs in the dictionary

Write the Python expression you would use to get the number of entries in a dictionary named students.
```
len(students)
```

Can dictionary entries be accessed by their position?

no. entries in a dictionary have no definite position