PyPDF2 AttributeError: 'Worksheet' object has no attribute 'export_pdf'

这个错误是因为 `export_pdf` 方法是在 `openpyxl` 模块中定义的，而不是在 `PyPDF2` 模块中定义的。如果你想将一个 Excel 文件转换成 PDF，可以使用 `openpyxl` 模块来实现。下面是一个简单的示例代码：

from openpyxl import load_workbook
from openpyxl.drawing.image import Image
from openpyxl.utils import get_column_letter
from openpyxl.worksheet.page import PageMargins

from io import BytesIO
from reportlab.pdfgen import canvas
from PyPDF2 import PdfFileWriter, PdfFileReader

def convert_excel_to_pdf(excel_file_path, pdf_file_path):
    # Load the workbook
    wb = load_workbook(excel_file_path)

    # Select the active worksheet
    ws = wb.active

    # Set the page margins
    ws.page_margins = PageMargins(left=0.5, right=0.5, top=0.5, bottom=0.5)

    # Get the dimensions of the worksheet
    rows = ws.max_row
    cols = ws.max_column

    # Create a new PDF file
    pdf = canvas.Canvas(pdf_file_path)

    # Iterate over the rows and columns of the worksheet
    for row in range(1, rows + 1):
        for col in range(1, cols + 1):
            # Get the cell value
            cell_value = ws.cell(row=row, column=col).value

            # Get the cell width and height
            cell_width = ws.column_dimensions[get_column_letter(col)].width
            cell_height = ws.row_dimensions[row].height

            # Set the font size and style
            pdf.setFont("Helvetica", 12)

            # Write the cell value to the PDF file
            pdf.drawString(col * cell_width + 10, 800 - row * cell_height - 10, str(cell_value))

    # Save the PDF file
    pdf.save()

    # Merge the PDF files
    input_pdf = PdfFileReader(BytesIO(open(pdf_file_path, 'rb').read()))
    output_pdf = PdfFileWriter()
    output_pdf.addPage(input_pdf.getPage(0))
    output_pdf.write(open(pdf_file_path, 'wb'))

这个函数会将指定的 Excel 文件转换成 PDF 文件，并保存在指定的位置。你可以调用这个函数来解决你遇到的问题。