PIPENV：运行FastApi应用程序时找不到PDFKIT

Question

我一直在使用FastApi和Pipenv开发API来管理我的虚拟环境。要启动测试设置，我在控制台上使用以下命令：

pipenv shell
uvicorn backend:app --reload

API在几秒钟后开始，一切都可以。但是，最近我决定安装PDFKIT，以生成一些需要发送回WebApp的PDF文档。但是，在我做到之后（使用此此页面作为参考）：

pipenv install pdfkit

现在，每当我尝试运行相同的uvicorn命令要启动我的API，API返回错误模块pdfkit找不到。我已经检查了该软件包是否已正确安装，并且确实会出现在我的PipFile上，并且每当我键入pip Freeze时，我的环境被激活了。

这是返回错误的API呼叫的片段：（

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import FileResponse, StreamingResponse
from scipy.optimize import leastsq
from openpyxl import load_workbook
from openpyxl.utils.dataframe import dataframe_to_rows
from openpyxl.styles import Font
from openpyxl import Workbook
import pandas as pd
import numpy as np
import json
import os

# ==========================
# SETUP
# ==========================

app = FastAPI()

# ==========================
# CORS
# ==========================

origins = [
    "http://127.0.0.1:5500/", 
    "http://127.0.0.1:8000/", 
    "http://localhost"
]

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],        # List of origins that are allowed to make cross-origin requests
    allow_credentials=True,     # Indicate that cookies should be supported for cross-origin requests
    allow_methods=["*"],        # List of HTTP methods that should be allowed for cross-origin requests
    allow_headers=["*"],        # List of HTTP headers that should be supported for cross-origin requests
)

# ==========================
# GET: PDF RENDERING
# ==========================

@app.get("/pdf")
def render_pdf(pdf_content: str):
    
    from jinja2 import Template, Environment, FileSystemLoader
    import pdfkit as pdf

    # Jinja2 template "generator" or "main" object (AKA Environment)
    env = Environment(loader = FileSystemLoader('PDF Rendering'), trim_blocks=True, lstrip_blocks=True)

    # Template parameters
    template_params = {
        "BASE_PATH": os.getcwd(),
        "REPORT_CONTENT": pdf_content,
    }

    # Render template
    template = env.get_template("pdf_template.j2")
    template_text = template.render(template_params)

    with open("PDF Rendering/render.html", "w") as f:
        f.write(template_text)

    # Turn rendered file to PDF
    pdf.from_file("PDF Rendering/render.html", "PDF Rendering/render.pdf")

    return {
        "message": "Success"
    }

Jinja部分会在注意您，但是由于某种原因，PDFKIT一个人没有）