How to add delimiter in text file python
I have recently started my job as an ETL Developer and as a part of my exercise, I am extracting data from a text file containing raw data. My raw data looks like this as shown in the image. My Raw Data Show Now I want to add delimiters to my data file. Basically after every line, I want to add a comma (
where However, it throws me error all the time.
Where exactly am I going wrong?
IntroductionA tab-delimited file is a well-known and widely used text format for data exchange. By using a structure similar to that of a spreadsheet, it also allows users to present information in a way that is easy to understand and share across applications - including relational database management systems.
Other formats, such as comma-separated values, often pose the challenge of having to escape commas, which are frequent within text (as opposed to tabs). Opening Files with PythonBefore we dive into processing tab-separated values, we will review how to read and write files with Python. The following example uses the
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After pressing Enter twice to execute the above suite, we will see tabs (\t) between fields, and new line breaks (\n) as record separators in Fig. 1: Although we will be primarily concerned with extracting data from files, we can also write to them. Again, note the use of \n at the beginning to indicate a new record and \t to separate fields:
python Although the Introducing the CSV ModuleAlthough it was named after comma-separated values, the CSV module can manage parsed files regardless of the field delimiter - be it tabs, vertical bars, or just about anything else. Additionally, this module provides two classes to read from and write data to Python dictionaries (DictReader and DictWriter, respectively). In this guide we will focus on the former exclusively. First off, we will import the CSV module: Next, we will open the file in read-only mode, instantiate a CSV reader object, and use it to read one row at a time:
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Fig. 2 shows that each row was read into a list after the above suite was executed: Although this undoubtedly looks much better than our previous version where tabs and new lines were mixed with the actual content, there is still room for improvement. The DictReader ClassTo begin, we will create an empty list where we will store each game as a separate dictionary: Finally, we will repeat the same code as above with only a minor change. Instead of printing each row, we will add it to games_list. If you are using Python 3.5 or older, you can omit
python We can go one step further and use list comprehension to return only those games where the visitor score was greater than 130. The following statement creates a new list called visitor_big_score_games and populates it with each game inside games_list where the condition is true:
python Now that we have a list of dictionaries, we can write it to a spreadsheet as explained in Importing Data from Microsoft Excel Files with Python or manipulate it otherwise. Another option consists of writing the list converted to string into a plain text file named visitor_big_score_games.json for distribution in JSON format:
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If you just want to view the list, not turn it into a spreadsheet or a JSON file, you can alternatively use
python As you can see, the possibilities are endless and the only limit is our imagination! SummaryIn this guide we learned how to import and manipulate data from tab-delimited files with Python. This not only is a highly valuable skill for data scientists, but for web developers and other IT professionals as well. How do you add delimiter to a text file?Open MSexcel , say file open , open txt file in excel ( while opening say all files since saved file must be in the text format) , it will take you to specify the delimiter , you can appropriately choose & take the action.
How do you add delimiters in Python?Method #1 : Using loop + str()
This is one of the ways in which this task can be performed. In this, we run a loop to add delimiter at end of each element, after converting each element to string.
How do you change the delimiter in a text file in Python?Type python change_delimiter.py (replacing change_delimiter.py with the name of your Python file) then press Enter. The comma-separated file will now be read in then a new file will be output in . txt format with the new delimiter.
How do I open a text file with delimiter in Python?Use str.. a_file = open("sample.txt"). file_contents = a_file. read(). contents_split = file_contents. splitlines(). print(contents_split). a_file. close(). |