import fitz
import os

def pyMuPDF_fitz(pdfPath, imagePath, num, all=True):
    """
    :param pdfPath: pdf文件路径
    :param imagePath: 图片存放目录
    :param num: 第几页，索引从0开始
    :param all: 是否转化所有页面
    :return:
    """
    pdfDoc = fitz.open(pdfPath)
    if all:
        start = 0
        end = pdfDoc.pageCount
    else:
        start = num
        end = num+1
    for i in range(start,end):
        page = pdfDoc[i]
        rotate = int(0)
        zoom_xy = (1.3333,1.3333)
        mat = fitz.Matrix(zoom_xy[0],zoom_xy[1]).prerotate(rotate)
        pix = page.getPixmap(matrix=mat,alpha=False)
        if not os.path.exists(imagePath):
            os.makedirs(imagePath)
        pix.writePNG(f"{imagePath}{i}.png")

pdfPath = 'E://a.pdf'
imagePath = 'E://'
pyMuPDF_fitz(pdfPath, imagePath ,0,False)

pdf_doc = fitz.Document(stream=pdf_req, filetype="pdf")
    page = pdf_doc[num]
    mat = fitz.Matrix(zoom_x, zoom_y).preRotate(0)
    clip = fitz.Rect(Point(coordinate[0] / k_y, coordinate[1] / k_x), Point(coordinate[2] / k_y, coordinate[3] / k_x))
    pix = page.getPixmap(matrix=mat, clip=clip)
    img_bytes = pix.getImageData()
    return BytesIO(img_bytes)