How to know if a font is embedded font or system font?

[moliqingwa]

Is your feature request related to a problem? Please describe.

doc = fitz.open(filename=file_path, stream=stream, filetype='pdf')

fonts = []
for page_no in range(doc.page_count):
    font_ans = doc.get_page_fonts(page_no, full=True)
    # we need a way to check the font is embedded or system font ???

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[JorjMcKie]

PyMuPDF does not support using system fonts.
A font is either embedded or a Base14 font. This difference is visible by looking at page.get_fonts() - as you did.
If you see a "n/a" then the font is not embedded, otherwise it is.
If not embedded then it is a standard font like a Base-14.
It never is a system font.