Python, remove all non-alphabet chars from string

Michael Zippo

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I am writing a python MapReduce word count program. Problem is that there are many non-alphabet chars strewn about in the data, I have found this post Stripping everything but alphanumeric chars from a string in Python which shows a nice solution using regex, but I am not sure how to implement it

def mapfn(k, v):
    print v
    import re, string 
    pattern = re.compile("[W_]+")
    v = pattern.match(v)
    print v
    for w in v.split():
        yield w, 1

I"m afraid I am not sure how to use the library re or even regex for that matter. I am not sure how to apply the regex pattern to the incoming string (line of a book) v properly to retrieve the new line without any non-alphanumeric chars.

Suggestions?

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Olivia Krasiko

Munchen | 2023-03-26

Simply put and clear. Thank you for sharing. Python, remove all non-alphabet chars from string and other issues with string Python module was always my weak point 😁. I am just not quite sure it is the best method

Schneider Innsbruck

Munchen | 2023-03-26

Maybe there are another answers? What Python, remove all non-alphabet chars from string exactly means?. Checked yesterday, it works!

Schneider Krasiko

San Francisco | 2023-03-26

Simply put and clear. Thank you for sharing. Python, remove all non-alphabet chars from string and other issues with io Python module was always my weak point 😁. Will use it in my bachelor thesis