My environment: OS: Windows 11 Python version: 3.13.2 NumPy version: 2.1.3 According to NumPy Fundementals guide describing how to use numpy.genfromtxt function: The optional argument comments is used to define a character string that marks the beginning of a comment. By default, genfromtxt assumes comments='#'. The comment marker may occur anywhere on the line. Any character present after the comment marker(s) is simply ignored. Note: There is one notable exception to this behavior: if the optional argument names=True, the first commented line will be examined for names. To do a test about the above-mentioned note (indicated in bold), I created the following data file and I put the header line, as a commented line: C:\tmp\data.txt #firstName|LastName Anthony|Quinn Harry|POTTER George|WASHINGTON And the following program to read and print the content of the file: with open("C:/tmp/data.txt", "r", encoding="UTF-8") as fd: result = np.genfromtxt(fd, comments="#", delimiter="|", dtype=str, names=True, skip_header=0) print(f"result = {result}") But the result is not what I expected: result = [('', '') ('', '') ('', '')] I cannot figure out where is the error in my code and I don't understand why the content of my data file, and in particular, its header line after the comment indicator #, is not interpreted correctly. I'd appriciate if you could kindly make some clarification. Continue reading...
