How to Append New Data Onto a New Line

append a new line to a file python

Prefix Bicycle with a newline character (\n) to have it write on a new line:

f.write("\nBicycle")

Appending line to a existing file having extra new line in Python

You can't, because, well, append mode does exactly that: It appends. To the newline. You will have to read in the file, remove the newline at the end, write it out and then append.

Or, open the file for reading and writing (mode 'r+'), seek to the end, remove the newline, and then continue with writing.

I think this could do the trick:

f = open('file.txt', 'r+')
f.seek(-2, 2) # last character in file
if f.read(2) == '\n\n':
   f.seek(-1, 1) # wow, we really did find a newline! rewind again!
f.write('orange')
f.close()

Append text to file with new line c++

Simply use a newline character '\n'.

ofstream data_ip_list;
data_ip_list.open("data_ip_list.txt", std::ios_base::app);

ifstream fileinput("ip_a.txt");
if(fileinput.is_open()){
    for(i = 0; i < count; ++i)
    {
        fileinput >> str1[i];
        data_ip_list << str1[i] << '\n';

How to append a new data block with new-line in red?

Newline marker is a property of a value slot, not of a series. new-line tail data true didn't set this marker, because tail of a series does not contain any value slot (but back tail does).

>> head new-line tail [a b c] on
== [a b c]
>> head new-line back tail [a b c] on
== [a b 
    c
]
>> append [a b c] new-line [d e f] on
== [a b c 
    d e f
]

How to append something to a new line in a excel file?

You could use the csv library, defining a Writer object to write to your file. So you would need to replace the else statement with something like that:

else:
    with open('USERS.csv', 'a', newline = '') as csvFile:
        csvWriter = csv.writer(csvFile, delimiter = ',')
        csvWriter.writerow(box_values)

The writerow method will automatically put your new data into a new row. Also you don't need to explicitly convert your data to string.

How to append to New Line in Node.js

It looks like you're running this on Windows (given your H://log.txt file path).

Try using \r\n instead of just \n.

Honestly, \n is fine; you're probably viewing the log file in notepad or something else that doesn't render non-Windows newlines. Try opening it in a different viewer/editor (e.g. Wordpad).

Appending to new line will not go to new line

Actually, as pointed out in other answers. This is by design. File.AppendAllLines appends text at the end of the file. It does not add a line break before appending text. For this, you will have to read the file somehow and determine if the last character is a line break. There are multiple ways to do this.

The simplest way is to just read all lines and check if the last line is empty. If not, just prepend a line break to your string before passing it to File.AppendAllLines.

However, if dealing with large files, or if you do not want to open the file multiple times - something like the following method will do this whilst still only opening the file once.

public void AppendAllLinesAtNewLine(string path, IEnumerable<string> content)
{
    // No file, just append as usual.
    if (!File.Exists(path))
    {
        File.AppendAllLines(path, content);
        return;
    }

    using (var stream = File.Open(path, FileMode.Open, FileAccess.ReadWrite))
    using (var reader = new StreamReader(stream))
    using (var writer = new StreamWriter(stream))
    {
        // Determines if there is a new line at the end of the file. If not, one is appended.
        long readPosition = stream.Length == 0 ? 0 : -1;
        stream.Seek(readPosition, SeekOrigin.End);
        string end = reader.ReadToEnd();
        if (end.Length != 0 && !end.Equals("\n", StringComparison.Ordinal))
        {
           writer.Write(Environment.NewLine);
        }

        // Simple write all lines.
        foreach (var line in content)
        {
            writer.WriteLine(line);
        }
    }
}

Note: the long readPosition = s.Length == 0 ? 0 : -1; is for handling empty files.

add new line to file when appending

Try the BufferedWriter.newLine() method.

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