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Python Regular Expressions in Python Introduction to Regular Expressions Reading Files

Hara Gopal K
PLUS
Hara Gopal K
Courses Plus Student 10,027 Points
Posted by Hara Gopal K
Hara Gopal K
Courses Plus Student 10,027 Points

storing regex in a variable

in the following code, i can't seem to store a re-expression in a variable. it's taking the literal value instead, any idea why ? In below example, the expression r'genre should take the value from a list named books.

books = ['romance',  'fiction ',  'young-adult',  'fantasy',  'ya',  'covers',  'best',  'children',  'science-fiction',  'history',   'non-fiction',  'teen',  'mystery',  'paranormal',  'love', ]

    for genre in books:
        re_genre = r'genre'
        match_object = re.search(re_genre, long_text)
        print(match_object)
'''

2 Answers

annecalija
annecalija
9,031 Points

I'd replace the line

    re_genre = r'genre'

with 

    re_genre = r'{}'.format(genre)

instead.

This answer is so late and probably solved already.

But as I'm trying to browse every question in every video to learn more, I think that these posts and answers will be very helpful for future course students.

evgenypanov
evgenypanov
1,521 Points
evgenypanov
evgenypanov
1,521 Points 
books = ['romance',  'fiction ',  'young-adult',  'fantasy',  'ya',  'covers',  'best',  'children',  'science-fiction',  'history',   'non-fiction',  'teen',  'mystery',  'paranormal',  'love', ]

 regex_pattern = re.compile(r'genre')  
 for book in books:
        match_object = re.search(regex_pattern, book)
        print(match_object)