使用 Jinja 创建 pdf 文件，而不创建 html 文件

Question

我正在使用 html 模板创建 pdf 文件，并使用 weasyprint 将 html 文件转换为 pdf 文件

代码工作完美，而且还创建了一个像pdf文件一样的html文件

有没有办法避免创建 html 文件而只创建 pdf 文件？？

这是我的代码

class Crud_db:
    def __init__(self, database = 'database.db'):
        self.database = database

    def connect(self):
        self.connection = sqlite3.connect(self.database)
        self.cursor = self.connection.cursor()
        # print('connect seccesfully')

    def execute(self, query):
        self.query = query
        self.cursor.execute(self.query)

    def close(self): 
        self.connection.commit()
        self.connection.close()

    def save_the_last_bill_to_html_pdf(self):
        env = Environment(loader=FileSystemLoader('templates'))
        # 3. Load the template from the Environment
        template = env.get_template('th_bill.html')

        # retrive the last general bill and details bill
        self.connect()
        query_general_bill = ''' SELECT general_bill.id, general_bill.client_name , general_bill.total , general_bill.total_margin , general_bill.number_of_products , general_bill.date_g ,general_bill.time_g , users.username user_id 
        FROM general_bill join users 
        on general_bill.user_id = users.id
        WHERE general_bill.id=(SELECT MAX(id) FROM general_bill) '''
        self.cursor.execute(query_general_bill)
        result_general_bill = self.cursor.fetchall()
        

        #  retrive the detail bill 

        query_details_bill = ''' SELECT product.product_name products, details_bill.number_of_products, details_bill.prix, details_bill.margin, details_bill.date, details_bill.time 
        FROM details_bill join product
        on product.id = products
        WHERE details_bill.general_bill_id = (SELECT MAX(id) FROM general_bill)'''
        self.cursor.execute(query_details_bill)
        result_detail_bill = self.cursor.fetchall() 
        # print(result_detail_bill)

        html = template.render(result_general = result_general_bill,
                            result_detail_bill = result_detail_bill)

        with open('html_report_jinja.html', 'w') as f:
            f.write(html)

        css = CSS(string='''
            @page {size: A4; margin: 1cm;} 
            th, td {border: 1px solid black;}
            ''')
        HTML('html_report_jinja.html').write_pdf('weasyprint_pdf_report.pdf', stylesheets=[css])

Answer 1

感谢@K J 的想法，我只是在函数末尾添加了删除功能

代码会是这样的

def save_the_last_bill_to_html_pdf(self):
        env = Environment(loader=FileSystemLoader('templates'))
        # 3. Load the template from the Environment
        template = env.get_template('th_bill.html')

        # retrive the last general bill and details bill
        self.connect()
        query_general_bill = ''' SELECT general_bill.id, general_bill.client_name , general_bill.total , general_bill.total_margin , general_bill.number_of_products , general_bill.date_g ,general_bill.time_g , users.username user_id 
        FROM general_bill join users 
        on general_bill.user_id = users.id
        WHERE general_bill.id=(SELECT MAX(id) FROM general_bill) '''
        self.cursor.execute(query_general_bill)
        result_general_bill = self.cursor.fetchall()
        # print(result_general_bill)

        #  retrive the detail bill 

        query_details_bill = ''' SELECT product.product_name products, details_bill.number_of_products, details_bill.prix, details_bill.margin, details_bill.date, details_bill.time 
        FROM details_bill join product
        on product.id = products
        WHERE details_bill.general_bill_id = (SELECT MAX(id) FROM general_bill)'''
        self.cursor.execute(query_details_bill)
        result_detail_bill = self.cursor.fetchall() 
        # print(result_detail_bill)

        html = template.render(result_general = result_general_bill,
                            result_detail_bill = result_detail_bill)

        with open('html_report_jinja.html', 'w') as f:
            f.write(html)

        css = CSS(string='''
            @page {size: A4; margin: 1cm;} 
            th, td {border: 1px solid black;}
            ''')
        HTML('html_report_jinja.html').write_pdf('weasyprint_pdf_report.pdf', stylesheets=[css])
        print('pdf file and html file created successfully')

        if os.path.exists("html_report_jinja.html"):
            os.remove("html_report_jinja.html")
            print("The file has been deleted successfully")
        else:
            print("The file does not exist!")

Answer 2

您正在将变量 html 写入文件。您也可以仅使用该变量作为 weasyprint HTML 方法的输入。 base_url 可以是文件或字符串的路径。在您的情况下，该字符串已经存在于您使用写入 html 文件的 html 变量中。