text-analysis | Weaving analytical stories from text data | Natural Language Processing library

I'm looking for an answer like this but in python. How can I do text preprocessing on multiple columns? I have two text columns see screenshots. To do the cleaning work, I have to do twice to each column (see my code). Is there any clever way to do a similar task? Thanks!

I am trying to do a text analysis using the quanteda packages in R and have been successful in gaining the desired output without doing anything to my texts. However, I am interested in removing stopwords and other common phrases to rerun the analysis (from what I am learning in other sources -- this process is called "Tokenizing"(?)). (The instructions are from https://data.library.virginia.edu/a-beginners-guide-to-text-analysis-with-quanteda/)

With the processed text, which I was able to do using the instructions and the quanteda package. However, I am interested in applying a dictionary for analyzing the text. How can I do that? Since it is hard to attach all my documents here, any hints or examples that I can apply would be helpful and greatly appreciated.

Thank you!

I downloaded MeCab to parse some Japanese text. To test it out, I tried doing what some examples online showed.

For example, I followed this guy's tips verbatim: http://www.robfahey.co.uk/blog/japanese-text-analysis-in-python/

The code is as follows:

I am having some issues understanding elastic search analyzer. What is it for and how to use it?

From this article, there is a tokenizer and token filter from a source text. Am I not able to understand the source text is from the URL or from the text inside the indexes? From the article, it says to execute "GET

http://localhost:9200/_analyze?text=I%20sing%20he%20sings%20they%20are%20singing&analyzer=snowball"

which is from the URL, but does this analyzer related to the search the text inside my indexes?

I am quite confused and sorry if my question sounds stupid.

How to complete words after stemming in R?

I am having trouble writing the RegEx results I got from multiple html files (text not in English) to a .txt outfile. It prints them out as several strings on new lines onscreen, but when I try to write it to an outfile, it only writes one random string. My code looks like this: Could you please help how I could write all the strings to the outfile from all the approx 100 files?

I extracted threegrams from a bunch of HTML files following a certain pattern. When I print them, I get a list of lists (where each line is a threegram). I would like to print it to an outfile for further text analysis, but when I try it, it only prints the first threegram. How can I print all the threegrams to the outfile? (The list of list of threegrams). I would ideally like to merge all the threegrams into one list instead of having multiple lists with one threegram. Your help would be highly appreciated.

My code looks like this so far: