python 报错，显示ModuleNotFoundError: No module named 'exception'

2017-05-02 09:42:08 4.6k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

解决Python中ModuleNotFoundError: No module named ‘sqlalchemy‘错误 Python开发中，模块导入错误是常见问题，尤其是当使用pip安装包后仍出现ModuleNotFoundError时。这通常与环境配置有关，涉及Python解释器路径、pip安装位置及虚拟环境管理。理解Python的模块搜索机制是关键：解释器会按sys.path列表顺序查找模块，而pip安装的包必须位于这些路径中。工程实践中，使用虚拟环境（如venv）能有效隔离依赖，避免多版本冲突。对于SQLAlchemy等ORM工具，正确安装是数据库操作的基础。排查时可依次验证：1) pip与python的对应关系 2) 阅读详情

显示错误，使用的是python3.6
如果不能够使用这个模块，可以换成什么呢？还是python3没有整个模块呢

Traceback (most recent call last):

  File "C:\Users\IBM\Desktop\商品信息.py", line 4, in <module>

    from exception import ValueError

ModuleNotFoundError: No module named 'exception'

from lxml import html  

import csv,os,json

import requests

from exception import ValueError

from time import sleep



def AmzonParser(url):

	headers = {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36'}

	page = requests.get(url,headers=headers)

	while True:

		sleep(3)

		try:

			doc = html.fromstring(page.content)

			XPATH_NAME = '//h1[@id="title"]//text()'

			XPATH_SALE_PRICE = '//span[contains(@id,"ourprice") or contains(@id,"saleprice")]/text()'

			XPATH_ORIGINAL_PRICE = '//td[contains(text(),"List Price") or contains(text(),"M.R.P") or contains(text(),"Price")]/following-sibling::td/text()'

			XPATH_CATEGORY = '//a[@class="a-link-normal a-color-tertiary"]//text()'

			XPATH_AVAILABILITY = '//div[@id="availability"]//text()'



			RAW_NAME = doc.xpath(XPATH_NAME)

			RAW_SALE_PRICE = doc.xpath(XPATH_SALE_PRICE)

			RAW_CATEGORY = doc.xpath(XPATH_CATEGORY)

			RAW_ORIGINAL_PRICE = doc.xpath(XPATH_ORIGINAL_PRICE)

			RAw_AVAILABILITY = doc.xpath(XPATH_AVAILABILITY)



			NAME = ' '.join(''.join(RAW_NAME).split()) if RAW_NAME else None

			SALE_PRICE = ' '.join(''.join(RAW_SALE_PRICE).split()).strip() if RAW_SALE_PRICE else None

			CATEGORY = ' > '.join([i.strip() for i in RAW_CATEGORY]) if RAW_CATEGORY else None

			ORIGINAL_PRICE = ''.join(RAW_ORIGINAL_PRICE).strip() if RAW_ORIGINAL_PRICE else None

			AVAILABILITY = ''.join(RAw_AVAILABILITY).strip() if RAw_AVAILABILITY else None



			if not ORIGINAL_PRICE:

				ORIGINAL_PRICE = SALE_PRICE



			if page.status_code!=200:

				raise ValueError('captha')

			data = {

					'NAME':NAME,

					'SALE_PRICE':SALE_PRICE,

					'CATEGORY':CATEGORY,

					'ORIGINAL_PRICE':ORIGINAL_PRICE,

					'AVAILABILITY':AVAILABILITY,

					'URL':url,

					}



			return data

		except Exception as e:

			print (e) 

def ReadAsin():

	# AsinList = csv.DictReader(open(os.path.join(os.path.dirname(__file__),"Asinfeed.csv")))

	AsinList = ['B0046UR4F4',

	'B00JGTVU5A',

	'B00GJYCIVK',

	'B00EPGK7CQ',

	'B00EPGKA4G',

	'B00YW5DLB4',

	'B00KGD0628',

	'B00O9A48N2',

	'B00O9A4MEW',

	'B00UZKG8QU',]

	extracted_data = []

	for i in AsinList:

		url = "http://www.amazon.com/dp/"+i

		print ("Processing: "+url)

		extracted_data.append(AmzonParser(url))

		sleep(5)

	f=open('data.json','w')

	json.dump(extracted_data,f,indent=4)





if __name__ == "__main__":

    ReadAsin()