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- Question: Extract the 7 words before every ‘$’ that appears and the 7 words after it (or until period)
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Extract the 7 words before every ‘$’ that appears and the 7 words after it (or until period)
Assuming that you have a string containing the text you want to extract from, you can use regular expressions to find the 7 words before and after each occurrence of the $ symbol. Here’s an example implementation:
import re
text = “Lorem ipsum dolor sit amet, $consectetur adipiscing elit. Vestibulum $euismod commodo nulla, vitae semper dolor posuere a. Sed in $nisi orci.”
matches = re.findall(r”(\w+(?:\W+\w+){0,6})\s*\$\s*(\w+(?:\W+\w+){0,6}\.|[^.]+)”, text)
for match in matches:
print(match[0] + ” $” + match[1])
In this code, the re.findall() function is used to find all matches of the regular expression pattern. The pattern consists of two capture groups:
(\w+(?:\W+\w+){0,6}): This matches the 7 words before the$symbol. The\w+matches one or more word characters (letters, digits, or underscores), and the(?:\W+\w+){0,6}matches 0 to 6 groups of one or more non-word characters followed by one or more word characters. The(?:...)is a non-capturing group that is used to group the\W+\w+pattern without capturing it as a separate group.(\w+(?:\W+\w+){0,6}\.|[^.]+): This matches the 7 words after the$symbol or until the period character (.) if it appears before the 7th word. The\w+and(?:\W+\w+){0,6}patterns match the same as in the first capture group, and the\.matches a period character. The[^.]+matches any character that is not a period character.
The matches variable contains a list of tuples, where each tuple contains the 7 words before and after the $ symbol. The for loop then prints each match with the $ symbol in between.
You can adjust the number of words before and after the $ symbol by changing the {0,6} in the regular expression pattern. This specifies that the pattern should match between 0 and 6 occurrences of the preceding pattern, which is the group of one or more non-word characters followed by one or more word characters.
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