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  • Creating an empty Pandas DataFrame, and then filling it
    In this example I am using this pandas doc to create a new data frame and then using append to write to the newDF with data from oldDF If I have to keep appending new data into this newDF from more than one oldDFs, I just use a for loop to iterate over pandas DataFrame append() Note: append() is deprecated since version 1 4 0 Use concat()
  • newline - Difference between \n and \r? - Stack Overflow
    The n stands for new line, again, from typewriter days you moved down to a new line Not necessarily to the start of it though, which is why some OSes adopted the need for both a r return followed by a n newline, as that was the order a typewriter did it in
  • How do I break a string in YAML over multiple lines?
    These allow characters such as \ and " without escaping, and add a new line (\n) to the end of your string > Folded style removes single newlines within the string (but adds one at the end, and converts double newlines to singles): Key: > this is my very very very long string → this is my very very very long string\n
  • How to generate keystore and truststore - Stack Overflow
    2 Generate new ca-cert and ca-key: openssl req -new -x509 -keyout ca-key -out ca-cert 3 Extracting cert creating cert sign req(csr): keytool -keystore KeyStore jks -alias bmc -certreq -file cert-file 4 Sign the “cert-file” and cert-signed wil be the new cert:
  • How can I create a copy of an object in Python?
    I would like to create a copy of an object I want the new object to possess all properties of the old object (values of the fields) But I want to have independent objects So, if I change values of the fields of the new object, the old object should not be affected by that
  • Add column to dataframe with constant value - Stack Overflow
    New df: Name, Date, Open, High, Low, Close abc, 01-01-2015, 565, 600, 400, 450 I know how to append an existing series dataframe column But this is a different situation, because all I need is to add the 'Name' column and set every row to the same value, in this case 'abc'
  • How to create virtual env with Python 3? - Stack Overflow
    To create a virtual environment, go to your project’s directory and run the following command This will create a new virtual environment in a local folder named venv: python3 -m venv venv Activate a virtual environment source venv bin activate To confirm the virtual environment is activated, check the location of your Python interpreter:
  • Proper way to initialize a C# dictionary with values
    Note that C# 9 allows Target-typed new expressions so if your variable or a class member is not abstract class or interface type duplication can be avoided: private readonly Dictionary<string, XlFileFormat> FILE_TYPE_DICT = new () { { "csv", XlFileFormat xlCSV }, { "html", XlFileFormat xlHtml } };




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