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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def html_header():
 """Get a standard html header for wrapping content in. :returns: A header containing a web page preamble in html - up to and including the body open tag. :rtype: str """

    file_path = resources_path('header.html')

    with codecs.open(file_path, 'r', encoding='utf8') as header_file:
        content = header_file.read()
        content = content.replace('PATH', resources_path())
    return content