我怎么在文件中这样做？

Question

def every_second_line(report):
    """ (Open File for reading) -> list of str

    Return a list containing every second line (with leading and trailing
    whitespace removed) in report, starting with the first line.
    """

Answer 1

如果我没记错的话，你会这样做：

def every_second_line(report_location):
    """ This code will return every second line with trailing whitespace stripped."""
    report = open(report_location, rb+)
    second_lines = [a.strip() for a in report.readlines()[1::2]]

    return second_lines

目前我还没有Python，但这应该有效。祝你好运！