尝试通过Python将选定的Excel工作表打印为PDF

Question

urls = (
    '/', 'Home',
    '/register', 'Register',
    '/login', 'Login',
    '/logout', 'Logout',
    '/postregistration', 'PostRegistration',
)


app = web.application(urls, globals())
session = web.session.Session(app, web.session.DiskStore("session"), initializer={"user": None})
session_data = session._initializer

render = web.template.render("Views/Templates", base = "Main",
                         globals={'session': session_data, 'current_user': session_data["user"]})


class PostRegistration:

  def POST(self):
    data = web.input()

    reg_model = RegisterModel.RegisterModel()
    reg_model.insert_user(data)

    return data.username

'''
RegistrationModel.py
'''

class RegisterModel:

  def __init__(self):
      self.client = MongoClient()
      self.db = self.client.codewizard
      self.Users = self.db.users

  def insert_user(self, data):
      hashed = bcrypt.hashpw(data.password.encode(), bcrypt.gensalt())

      id = self.Users.insert({"username": data.username, "name":   data.name, "password": hashed,
                            "email": data.email, "avatar": "", "background": "", "about": "",
                            "hobbies": "", "birthday": ""})
   print("uid is", id)

'''
Register.html
'''

<div class = "container">
<h2>Register Account</h2>
<br /><br />

<form id="register-form">
    <div class="form-group label-static is-empty">
        <label for="username" class="control-label">Username</label>
        <input name = "username" id = "username" class = "form-control" type = "text" placeholder = "Choose a username" />
    </div>

    <div class="form-group label-static is-empty">
        <label for="display_name" class="control-label">Full Name</label>
        <input name = "display_name" id = "display_name" class = "form-control" type = "text" placeholder = "Enter your full name" />
    </div>

    <div class="form-group label-static is-empty">
        <label for="email" class="control-label">Email Address</label>
        <input name = "email" id = "email" class = "form-control" type = "email" placeholder = "Enter your email" />
    </div>

    <div class="form-group label-static is-empty">
        <label for="password" class="control-label">Password</label>
        <input name = "password" id = "password" class = "form-control" type = "password" placeholder = "Make a password" />
    </div>

    <button type = "submit" class = "btn btn-info waves-effect">Submit</button>
</form>

很清楚，除了最后一行，代码中的每一行都有效。我可以看到选择了前五个工作表，并且Excel甚至有一个正在填充的“发布”窗口。但是，它无法输出任何内容，并且我得到了（-2147352567，'发生了异常。'....）