python 制作发货单（生成 html, pdf）

起因，目的:

某个小店，想做个发货单。

过程:

先写一个 html 模板。
准备数据，一般是从数据库读取，也可以是 json 格式，或是 python 字典。总之，是数据内容。
使用 jinja2 来渲染模板。
最终的结果可以是 html, 也可以是 pdf, 反正可以直接让打印机打印。

代码 1， html 模板

<!DOCTYPE html>
<html>
<head><title>Invoice</title><style>body {font-family: Arial, sans-serif;margin: 0;padding: 0;}.container {max-width: 800px;margin: 0 auto;padding: 20px;border: 1px solid #ccc;}table {width: 100%;border-collapse: collapse;}h2 {margin-bottom: 50px;text-align: center;}th, td {padding: 10px;text-align: left;border-bottom: 1px solid #ccc;}.invoice-details {margin-bottom: 20px;text-align: left;}.invoice-details p {margin: 0;font-size: 16px;}.invoice-details strong {font-weight: bold;}.invoice-items {margin-top: 60px;margin-bottom: 20px;}.invoice-items th {font-weight: bold;text-align: left;}.invoice-items td {text-align: left;}.invoice-total {text-align: right;margin-right: 30px;}.invoice-total strong {font-size: 20px;font-weight: bold;}.bottom {margin-top: 40px;text-align: right;}.info {margin-top: 60px;}.signature {width: 200px;height: auto;}@media print {.container {border: none;}}</style>
</head>
<body><div class="container"><h2>{{ invoice_header }}</h2><div class="invoice-details"><p><strong>Invoice number:</strong> {{ invoice_number }}</p><p><strong>Date:</strong> {{ payment_received_date }}</p><p><strong>Billed to:</strong> {{ billed_to }}</p><p><strong>Address: </strong> {{ billed_to_address }}</p></div><div class="invoice-items"><table><thead><tr><th>Description</th><th>Amount</th><th>Currency</th></tr></thead><tbody><tr><td>{{ work_description }}</td><td>{{ amount }}</td><td>{{ currency }}</td></tr></tbody></table></div><p class="info">Paid in {{ currency }} to {{ person }},IBAN <strong>{{account_iban}}</strong>,SWIFT <strong>{{ swift }}</strong></p><div class="invoice-details bottom"><p><strong>{{ person }}</strong></p><p><strong>Email:</strong> {{ email }}</p></p><p><strong>Phone:</strong> {{ phone }}</p></div></div>
</body>
</html>

在这里插入图片描述

代码 2， python

# file: render_html.py
# 把 json 数据写入到 html 里面，进行渲染，输出实际数据的 html
from jinja2 import FileSystemLoader, Environment# 参考来源
# https://dboostme.medium.com/how-to-generate-invoices-using-python-playwright-d77839af4b1e# 实际上，下面这个教程写的很不错！
# https://practicalpython.yasoob.me/chapter3invoice_number = 1context = {"invoice_number": invoice_number,"invoice_header": "Invoice for Delivering Pizza","amount": 10,"currency": "USD","account": "account_id","account_iban": "account_iban","swift": "account_swift","work_description": "Delivering pizza on motorbike","person": "James Bond","email": "james@bond.mi6","phone": "+4476898123428","billed_to": "MI-6","billed_to_address": "85 Albert Embankment","payment_received_date": "2023-08-05"
}# 整体的逻辑是： 找个模板文件，用 jinja2 渲染数据，输出 html 文件template_loader = FileSystemLoader("./")
template_env = Environment(loader=template_loader)template = template_env.get_template("invoice_sample.html") # html 模板文件invoice_html = template.render(context)file_name = f"output_{invoice_number}.html"
with open(file_name, "w") as html_file:html_file.write(invoice_html)

最终的效果
在这里插入图片描述
其实也可以加一个 logo，加个图片，更好看一些。比如像这个样:

代码 3, 把 html 转为 pdf

import pdfkit  # 这个是可行的！！！"""
# 这种方式按照运行失败！！
# from weasyprint import HTML # pip install weasyprint
"""config = pdfkit.configuration(wkhtmltopdf=r"C:\Program Files\wkhtmltopdf\bin\wkhtmltopdf.exe")
# ret = pdfkit.from_file('1.html', '1.pdf', configuration=config)
ret = pdfkit.from_file('output_1_new.html', 'output_1_new.pdf', configuration=config)
print(ret)
# True