Question

1. Using list comprehension and a single line of code, flatten a given list of lists. For example your line of code must give [1, 2, 3, 4, 5, 6] out of [[1, 2], [3, 4], [5, 6]].

2. Using list comprehension, and without using any imported module, write a Python function to return a list of email addresses in a given phrase of text. Inside your function you must do this with a single line of code.

For example, for the given phrase of , "Interested faculty are encouraged to send a letter indicating their interest in this opportunity by April 26 to info@asccc.org or cs110a@asccc.org or call @ +1-900-900-90. Feedback will be provided to those submitting letters. The formal application process, with additional details, will be published shortly thereafter" must return the list, [info@asccc.org, cs110a@asccc.org].

Answer 1

# 1
ll = [[1, 2], [3, 4], [5, 6]]
result = [val for lst in ll for val in lst]
print(result)


# 2
def get_emails(s):
    return [word for word in s.split() if '@' in word and '.' in word]


s = "Interested faculty are encouraged to send a letter indicating their interest in this opportunity by April 26 to info@asccc.org or cs110a@asccc.org or call @ +1-900-900-90. Feedback will be provided to those submitting letters. The formal application process, with additional details, will be published shortly thereafter"
print(get_emails(s))