本地 Azure Python：函数没有名为“pyodbc”的模块

Question

我正在尝试使用 Azure Functions (HttpTrigger) 来读取我的电子邮件并将它们放入我的 Azure 数据库中。 为了实现这一点，我开发了一个 python 脚本（readEmail.py 和 raFunctions.py） ，它在 Ubuntu 中的 Visual Studio Code 下本地工作。 我尝试的下一步是将此脚本转换为 Azure 函数。 当我尝试在本地运行 Azure 函数时：

func host start

http://localhost:7071/api/ReadEmail?name=erik

它返回以下错误：

Executed 'Functions.ReadEmail' (Failed, Id=4284c861-ce2f-4755-a7e3-94e269a42bc1)
[1/11/20 8:14:43 AM] System.Private.CoreLib: Exception while executing function: Functions.ReadEmail. System.Private.CoreLib: Result: Failure
[1/11/20 8:14:43 AM] Exception: ModuleNotFoundError: No module named 'pyodbc'
[1/11/20 8:14:43 AM] Stack:   File "/usr/lib/azure-functions-core-tools/workers/python/3.6/LINUX/X64/azure_functions_worker/dispatcher.py", line 242, in _handle__function_load_request
[1/11/20 8:14:43 AM]     func_request.metadata.entry_point)
[1/11/20 8:14:43 AM]   File "/usr/lib/azure-functions-core-tools/workers/python/3.6/LINUX/X64/azure_functions_worker/loader.py", line 66, in load_function
[1/11/20 8:14:43 AM]     mod = importlib.import_module(fullmodname)
[1/11/20 8:14:43 AM]   File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
[1/11/20 8:14:43 AM]     return _bootstrap._gcd_import(name[level:], package, level)
[1/11/20 8:14:43 AM]   File "/home/webapp/git/RAFunctions/ReadEmail/__init__.py", line 4, in <module>
[1/11/20 8:14:43 AM]     import pyodbc

我希望你能在这里帮助我！ 我将 python 脚本放在下面的代码中。

功能文件夹

• HttpTrigger（Azure 教程）
• 阅读电子邮件（Azure 函数）
  • function.json（默认 Azure）
  • 初始化.py
  • raFunctions.py（帮助程序）
  • readEmail.py（帮助程序）
• host.json（默认 Azure）
• local.settings.json（默认 Azure）
• proxies.json（默认 Azure）
• 要求.txt

__init__.py

 import logging
import email
import imaplib
import pyodbc
from datetime import datetime
from .readEmail import readEmail
import azure.functions as func


def main(req: func.HttpRequest) -> func.HttpResponse:
    logging.info('Python HTTP trigger function processed a request.')

    responseEmail = readEmail()

    name = req.params.get('name')
    if not name:
        try:
            req_body = req.get_json()
        except ValueError:
            pass
        else:
            name = req_body.get('name')

    if name:
        return func.HttpResponse(f"Hello {responseEmail}!")
    else:
        return func.HttpResponse(
             "Please pass a name on the query string or in the request body",
             status_code=400
        )

阅读电子邮件.py

import email
import imaplib
import pyodbc
from datetime import datetime
from .raFunctions import uitvullenDatum

def readEmail():
#Configurations
EMAIL = 'myemail@myemail.com'
PASSWORD = 'mypassword'
SERVER = 'imap.provider.com'

server = 'myserver.database.windows.net'
database = 'mydatabase'
username = 'mydbusername'
password = 'mypassword'
driver= '{ODBC Driver 17 for SQL Server}'

connectionString = 'DRIVER='+driver+';SERVER='+server+';PORT=1433;DATABASE='+database+';UID='+username+';PWD='+ password +';Authentication=ActiveDirectoryPassword'

# Connection settings to Database and Email Server
mail = imaplib.IMAP4_SSL(SERVER)
mail.login(EMAIL, PASSWORD)
cnxn = pyodbc.connect('DRIVER='+driver+';SERVER='+server+';PORT=1433;DATABASE='+database+';UID='+username+';PWD='+ password +';Authentication=ActiveDirectoryPassword')
cursor = cnxn.cursor()

try:
    mail.select('inbox')
    status, data = mail.search(None, 'ALL')
    mail_ids = []
    for block in data:

        mail_ids += block.split()
    for i in mail_ids:

        status, data = mail.fetch(i, '(RFC822)')
        for response_part in data:
            if isinstance(response_part, tuple):
                message = email.message_from_bytes(response_part[1])
                mail_from = message['From']
                mail_subject = message['Subject']          
                mail_date = message['Date']

                if message.is_multipart():
                    mail_content = ''

                    for part in message.get_payload():

                        if part.get_content_type() == 'text/plain':
                            mail_content += part.get_payload()

                        else:
                            mail_content = part.get_payload()   

                else:
                    mail_content = message.get_payload()

                maildate = email.utils.parsedate(mail_date)
                maildate = uitvullenDatum(str(maildate[0]),str(maildate[1]),str(maildate[2]))

                values = (maildate, mail_from, mail_subject, mail_content)
                sql = "EXEC wp_ra.invoerenmail ?, ?, ?, ?"
                cursor.execute(sql, (values))
                cursor.commit()
                return "Email succesvol ingelezen!"
catch:
    return "Fout bij het inlezen van de mail!"

** 要求.txt **

azure-functions
azure-functions-worker
re
datetime
pyodbc
imaplib
email
logging

经过一些帮助，我还尝试在 python 中创建一个虚拟环境并安装所有必要的模块并再次运行 func 主机

python -m venv .venv
source .venv/bin/activate
pip3 install azure, re, pyodbc, imaplib, email, logging
pip3 freeze > requirements.txt
func host start

我现在得到错误：

[1/12/20 7:02:34 AM] Executed 'Functions.ReadEmail' (Failed, Id=583e1234-9ad4-477b-b23f-56f53493579d)
[1/12/20 7:02:34 AM] System.Private.CoreLib: Exception while executing function: Functions.ReadEmail. System.Private.CoreLib: Result: Failure
[1/12/20 7:02:34 AM] Exception: SyntaxError: invalid syntax (readEmail.py, line 67)
[1/12/20 7:02:34 AM] Stack:   File "/usr/lib/azure-functions-core-tools/workers/python/3.6/LINUX/X64/azure_functions_worker/dispatcher.py", line 242, in _handle__function_load_request
[1/12/20 7:02:34 AM]     func_request.metadata.entry_point)
[1/12/20 7:02:34 AM]   File "/usr/lib/azure-functions-core-tools/workers/python/3.6/LINUX/X64/azure_functions_worker/loader.py", line 66, in load_function
[1/12/20 7:02:34 AM]     mod = importlib.import_module(fullmodname)
[1/12/20 7:02:34 AM]   File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
[1/12/20 7:02:34 AM]     return _bootstrap._gcd_import(name[level:], package, level)
[1/12/20 7:02:34 AM]   File "<frozen importlib._bootstrap>", line 994, in _gcd_import
[1/12/20 7:02:34 AM]   File "<frozen importlib._bootstrap>", line 971, in _find_and_load
[1/12/20 7:02:34 AM]   File "<frozen importlib._bootstrap>", line 941, in _find_and_load_unlocked
[1/12/20 7:02:34 AM]   File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
[1/12/20 7:02:34 AM]   File "<frozen importlib._bootstrap>", line 994, in _gcd_import
[1/12/20 7:02:34 AM]   File "<frozen importlib._bootstrap>", line 971, in _find_and_load
[1/12/20 7:02:34 AM]   File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
[1/12/20 7:02:34 AM]   File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
[1/12/20 7:02:34 AM]   File "<frozen importlib._bootstrap_external>", line 678, in exec_module
[1/12/20 7:02:34 AM]   File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
[1/12/20 7:02:34 AM]   File "/home/webapp/git/RAFunctions/ReadEmail/__init__.py", line 6, in <module>
[1/12/20 7:02:34 AM]     from .readEmail import readEmail

Answer 1

您能否尝试创建一个 Python 虚拟环境并在同一环境中运行该函数。

• 用于创建环境和激活：

  https://docs.microsoft.com/en-us/azure/azure-functions/functions-create-first-function-python#create-and-activate-a-virtual-environment 。

• 请从您的应用中运行**pip freeze > requirements.txt**

• 激活后在虚拟环境中安装所需的库：

  pip install -r requirements.txt

• 使用**func host start**运行该函数，看看它是否有效。