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"Write a function that gets a string, as presented below, as a parameter and returns the user name and the host from the string.\n", "\n", "'From stephen.marquard@uct.ac.za Sat Jan 5 09:14:16 2008'\n", #t

"Write a function that gets a string, as presented below, as a parameter and returns the user name and the host from the string.\n", "\n", "'From stephen.marquard@uct.ac.za Sat Jan 5 09:14:16 2008'\n", #t

Database System Concepts
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
Section: Chapter Questions
Problem 1PE
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### Extracting User and Host from an Email String **Problem Statement:** Write a function that receives a string, as presented below, as a parameter and returns the username and the host from the string. **Example String:** ``` 'From stephen.marquard@uct.ac.za Sat Jan 5 09:14:16 2008' ``` **Detailed Breakdown:** 1. **Original String:** ``` 'From stephen.marquard@uct.ac.za Sat Jan 5 09:14:16 2008' ``` 2. **Extracted Information:** - **User:** ``` stephen.marquard ``` - **Host:** ``` uct.ac.za ``` Given the string in the example, the function should correctly identify and separate the username (`stephen.marquard`) and the host (`uct.ac.za`) parts of the email address. This type of function is useful in various applications such as email processing, user identity management, and data parsing tasks in software development. **Python Implementation:** Here’s an example of how you might implement such a function in Python: ```python def extract_user_host(email_string): import re pattern = r'From (\S+@\S+)' match = re.search(pattern, email_string) if match: email = match.group(1) user, host = email.split('@') return user, host return None # Example usage email_string = 'From stephen.marquard@uct.ac.za Sat Jan 5 09:14:16 2008' user, host = extract_user_host(email_string) print("The user is:", user) print("The host is:", host) ``` **Output:** ``` The user is: stephen.marquard The host is: uct.ac.za ``` This implementation uses a regular expression to find the email within the string and then splits the email to obtain the user and host parts.
Transcribed Image Text:### Extracting User and Host from an Email String **Problem Statement:** Write a function that receives a string, as presented below, as a parameter and returns the username and the host from the string. **Example String:** ``` 'From stephen.marquard@uct.ac.za Sat Jan 5 09:14:16 2008' ``` **Detailed Breakdown:** 1. **Original String:** ``` 'From stephen.marquard@uct.ac.za Sat Jan 5 09:14:16 2008' ``` 2. **Extracted Information:** - **User:** ``` stephen.marquard ``` - **Host:** ``` uct.ac.za ``` Given the string in the example, the function should correctly identify and separate the username (`stephen.marquard`) and the host (`uct.ac.za`) parts of the email address. This type of function is useful in various applications such as email processing, user identity management, and data parsing tasks in software development. **Python Implementation:** Here’s an example of how you might implement such a function in Python: ```python def extract_user_host(email_string): import re pattern = r'From (\S+@\S+)' match = re.search(pattern, email_string) if match: email = match.group(1) user, host = email.split('@') return user, host return None # Example usage email_string = 'From stephen.marquard@uct.ac.za Sat Jan 5 09:14:16 2008' user, host = extract_user_host(email_string) print("The user is:", user) print("The host is:", host) ``` **Output:** ``` The user is: stephen.marquard The host is: uct.ac.za ``` This implementation uses a regular expression to find the email within the string and then splits the email to obtain the user and host parts.
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