Delete Prussia from country_capital. Sample output with input: 'Spain:Madrid, Togo:Lome, Prussia:Konigsberg' Prussia deleted? Yes. Spain deleted? No. Togo deleted? No.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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## Delete Prussia from `country_capital`

This lesson demonstrates how to delete an entry from a dictionary in Python. The task involves removing the entry for "Prussia" from a `country_capital` dictionary.

### Sample Output

Given the input:

```
'Spain:Madrid,Togo:Lome,Prussia:Konigsberg'
```

The program will output:

```
Prussia deleted? Yes.
Spain deleted? No.
Togo deleted? No.
```

### Code Explanation

```python
1  user_input = input()
2  entries = user_input.split(',')
3  country_capital = {}
4
5  for pair in entries:
6      split_pair = pair.split(':')
7      country_capital[split_pair[0]] = split_pair[1]
8      # country_capital is a dictionary, Ex. {'Germany': 'Berlin', 'France': 'Paris'}
9
10
11 print('Prussia deleted?', end=' ')
12 if 'Prussia' in country_capital:
13     print('No.')
14 else:
15     print('Yes.')
```

#### Code Breakdown

- **Line 1:** Takes user input.
- **Line 2:** Splits the input string into individual country-capital pairs.
- **Line 3:** Initializes an empty dictionary named `country_capital`.
- **Lines 5-7:** Iterates over each pair, splits it by the colon `:`, and adds the country and its capital to the `country_capital` dictionary.
- **Comment on Line 8:** Provides an example of what the `country_capital` dictionary looks like, with countries as keys and capitals as values.
- **Line 11:** Checks if 'Prussia' is in the `country_capital` dictionary.
- **Lines 12-15:** Prints 'No' if Prussia is still present, and 'Yes' if it has been deleted. 

### Educational Insight

This exercise helps understand basic dictionary operations in Python, including how to populate a dictionary and check for the existence of a key. Understanding these operations is fundamental for managing data efficiently in Python.
Transcribed Image Text:## Delete Prussia from `country_capital` This lesson demonstrates how to delete an entry from a dictionary in Python. The task involves removing the entry for "Prussia" from a `country_capital` dictionary. ### Sample Output Given the input: ``` 'Spain:Madrid,Togo:Lome,Prussia:Konigsberg' ``` The program will output: ``` Prussia deleted? Yes. Spain deleted? No. Togo deleted? No. ``` ### Code Explanation ```python 1 user_input = input() 2 entries = user_input.split(',') 3 country_capital = {} 4 5 for pair in entries: 6 split_pair = pair.split(':') 7 country_capital[split_pair[0]] = split_pair[1] 8 # country_capital is a dictionary, Ex. {'Germany': 'Berlin', 'France': 'Paris'} 9 10 11 print('Prussia deleted?', end=' ') 12 if 'Prussia' in country_capital: 13 print('No.') 14 else: 15 print('Yes.') ``` #### Code Breakdown - **Line 1:** Takes user input. - **Line 2:** Splits the input string into individual country-capital pairs. - **Line 3:** Initializes an empty dictionary named `country_capital`. - **Lines 5-7:** Iterates over each pair, splits it by the colon `:`, and adds the country and its capital to the `country_capital` dictionary. - **Comment on Line 8:** Provides an example of what the `country_capital` dictionary looks like, with countries as keys and capitals as values. - **Line 11:** Checks if 'Prussia' is in the `country_capital` dictionary. - **Lines 12-15:** Prints 'No' if Prussia is still present, and 'Yes' if it has been deleted. ### Educational Insight This exercise helps understand basic dictionary operations in Python, including how to populate a dictionary and check for the existence of a key. Understanding these operations is fundamental for managing data efficiently in Python.
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