Finding mentioned weekdays from text

Question

Let’s say we have a text of

Even though we celebrate Good Friday and Easter Sunday, there is no mention of days such as "Sunday" or "Wednesday".

Notice the following weekdays are mentioned, Friday, Sunday, Sunday, Wednesday

We need output some variable weekdays that, in this case, would have:

weekdays:    [3,5,7]

Assuming,

We count from 1
We don’t care about repeated entries
1 is Monday
7 is Sunday

What would be the most Pythonic way to approach such information?

Asked By: TAbdiukov

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Source

Answer 1

I would use a regular expression to identify the days of the week that appear in the text, and then use a set comprehension to get the desired indices:

days_of_week = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]
day_indices = dict(zip(days_of_week, range(1, 8)))
expr = "|".join(rf"b{day}b" for day in days_of_week)
matches = re.findall(expr, text)
result = sorted(list(set(day_indices[day] for day in matches)))

print(result)

This outputs:

[3, 5, 7]

Answered By: BrokenBenchmark

Answer 2

You can create a dictionary of days and then check for keys by the words in the given text

# Dictonary with days as keys and numbers as values
day_dict = {"Monday": 1, "Tuesday": 2, "Wednesday":3 }
text = "Even though we celebrate Good Friday and Easter Sunday, there is no mention of days such as 'Sunday' or 'Wednesday' in the Bible."
res=[]
# loop over words in text
for word in text.split(' '):
    # get dict value based on word
    a = day_dict.get(word)
    # if word exists in dict and is not yet in your "result" --> add it
    if a and a not in res:
        res.append(a)

Answered By: hYg-Cain

Finding mentioned weekdays from text

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