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python - 在函数之间传递两个变量

问题描述

编辑我弄得一团糟！我真的很抱歉！问题与最后 2 个打印语句无关。当我没有主意时添加了这些。整个问题是关于传递title和final_price 形成并在主体和主体中使用它们check_price。send_email

我刚刚碰到砖墙，不知道在这里找到答案。我试图根据 YT 上的一些指南创建网络抓取工具。然而，由于我缺乏知识和经验，我陷入了如何传递 2 个变量title以及 final_price从函数传递check_price()到函数的问题上send_mail()

如果我尝试仅使用纯文本发送没有这些变量的电子邮件，一切都会奏效。

import os
import smtplib
import requests
from email.message import EmailMessage
from bs4 import BeautifulSoup

EMAIL_ADDRESS = os.environ.get('GMAIL_USER')
EMAIL_PASSWORD = os.environ.get('GMAIL_PASSWORD')

URL_AMZ = 'https://www.amazon.de/Logitech-kabelgebundene-fortschrittlicher-Muskelbelastung-fortschrittliche/dp/B07FNHV4MW/ref=sr_1_3?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=26227QRRLWQHF&keywords=logitech+mx+vertical&qid=1571861245&sprefix=logitech+mx+%2Caps%2C342&sr=8-3'
# URL_MBNK = 'https://www.mbank.pl/serwis-ekonomiczny/kursy-walut/'
URL_GGL ='https://www.google.com/search?rlz=1C1GCEU_plPL839PL839&sxsrf=ACYBGNSHqUQOq6lZRXHyeKLPAd0peUegqg%3A1571862894642&ei=brmwXevuJuaFk74P1Mi12A8&q=euro&oq=euro&gs_l=psy-ab.3..0i71l8.0.0..1236884...0.2..0.0.0.......0......gws-wiz.D2K7kmd_GB8&ved=0ahUKEwjr3eHLnbPlAhXmwsQBHVRkDfsQ4dUDCAs&uact=5'


headers = {"User-Agent":'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.120 Safari/537.36'}

def check_price():
    # global title
    # global final_price
    page_amaz = requests.get(URL_AMZ, headers=headers)
    # page_mbnk = requests.get(URL_MBNK, headers=headers)
    page_ggl = requests.get(URL_GGL, headers=headers)

    soup_amaz = BeautifulSoup(page_amaz.content, 'html.parser')
    # soup_mbnk = BeautifulSoup(page_mbnk.content, 'html.parser')
    soup_ggl = BeautifulSoup(page_ggl.content, 'html.parser')


    title = soup_amaz.find(id='productTitle').get_text()
    price = soup_amaz.find(id='priceblock_ourprice').get_text()
    converted_price = float(price[0:-2].replace(',','.'))

    # convert_ratio = soup_mbnk.find(id="currencies").get_text()
    convert_ratio_ggl = soup_ggl.find('div','dDoNo vk_bk').get_text()
    clean_convert_ratio = float(convert_ratio_ggl[0:4].replace(',','.'))

    final_price = converted_price * clean_convert_ratio 

    if(final_price > 200):
        send_email()

    return title, final_price

def send_email():
    title, final_price = check_price()
    msg = EmailMessage()
    msg['Subject'] = f'Zmiana ceny produktu {title}' #% (title)
    msg['From'] = EMAIL_ADDRESS
    msg['To'] = 'I know it's bit to late... but here was my email'
    msg.set_content(f'Cena {final_price} -- Link:{URL_AMZ}') # % (final_price  ,URL_AMZ))

    with smtplib.SMTP_SSL('smtp.gmail.com', 465) as smtp:
        smtp.login(EMAIL_ADDRESS , EMAIL_PASSWORD)
        smtp.send_message(msg)
        print("Mail Wysłany")
#print(title)
#print(final_price)

编辑问题已解决。我，先生，感谢所有的帮助。

下面固定和清理的代码。

import requests
import smtplib
import os
from bs4 import BeautifulSoup
from email.message import EmailMessage

EMAIL_ADDRESS = os.environ.get('GMAIL_USER')
EMAIL_PASSWORD = os.environ.get('GMAIL_PASSWORD')

URL_AMZ = 'https://www.amazon.de/Logitech-kabelgebundene-fortschrittlicher-Muskelbelastung-fortschrittliche/dp/B07FNHV4MW/ref=sr_1_3?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=26227QRRLWQHF&keywords=logitech+mx+vertical&qid=1571861245&sprefix=logitech+mx+%2Caps%2C342&sr=8-3'
URL_GGL ='https://www.google.com/search?rlz=1C1GCEU_plPL839PL839&sxsrf=ACYBGNSHqUQOq6lZRXHyeKLPAd0peUegqg%3A1571862894642&ei=brmwXevuJuaFk74P1Mi12A8&q=euro&oq=euro&gs_l=psy-ab.3..0i71l8.0.0..1236884...0.2..0.0.0.......0......gws-wiz.D2K7kmd_GB8&ved=0ahUKEwjr3eHLnbPlAhXmwsQBHVRkDfsQ4dUDCAs&uact=5'


headers = {"User-Agent":'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.120 Safari/537.36'}

def check_price():

    page_amaz = requests.get(URL_AMZ, headers=headers)
    page_ggl = requests.get(URL_GGL, headers=headers)

    soup_amaz = BeautifulSoup(page_amaz.content, 'html.parser')
    soup_ggl = BeautifulSoup(page_ggl.content, 'html.parser')

    title = soup_amaz.find(id='productTitle').get_text()
    final_title = title.strip() # variable title contain monstrocity that contained 5 8x \r\n above and belowe title.
    price = soup_amaz.find(id='priceblock_ourprice').get_text()
    converted_price = float(price[0:-2].replace(',', '.'))

    convert_ratio_ggl = soup_ggl.find('div','dDoNo vk_bk').get_text()
    clean_convert_ratio = float(convert_ratio_ggl[0:4].replace(',','.'))

    final_price = converted_price * clean_convert_ratio

    if final_price > 200:
        send_email(final_title, final_price)
   

def send_email(final_title, final_price):
    msg = EmailMessage()
    msg['Subject'] = f'Zmiana ceny produktu {final_title}'
    msg['From'] = EMAIL_ADDRESS
    msg['To'] = 'EMAIL_ADDRESS'

    msg.set_content(f'Cena {final_price} -- Link:{URL_AMZ}') 

    with smtplib.SMTP_SSL('smtp.gmail.com', 465) as smtp:
        smtp.login(EMAIL_ADDRESS , EMAIL_PASSWORD)
        smtp.send_message(msg)
        print("Mail Wysłany")
check_price()

后来我遇到了生成 由变量引起的Send_email()错误 的墙（它没有从上面和下面的所有空行中删除。ValueError: Header values may not contain linefeed or carriage return characterstitle

再一次非常感谢大家。

标签： python

解决方案

我相信您获取变量的方式title很好final_price，应该可以。

但是，最后两个打印不应该工作，因为它们在 send_email() 函数之外，因此title是final_price未知的。您是否尝试过将 print 放入函数中并调用它？

更新：

我现在看到了错误，您正在调用send_email()insidecheck_price()和check_price()inside send_email()，这可能导致无休止的循环。

为了解决这个问题，如果您要调用的函数是check_price()，您可以send_email()接受两个参数并在调用时传递它们。所以，check_price()你会这样做：

...
if(final_price > 200):
   send_email(title,final_price)
...

然后send_email将如下：

def send_email(title,final_price):
   msg = EmailMessage()
   ...

更新 2：

您还在单引号字符串中使用撇号：

'I know it's bit to late... but here was my email'

你应该做：

"I know it's bit to late... but here was my email"

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