python3.7導入BeautifulSoup報錯

python 爬蟲用BeautifulSoup 將pycharm的項目解釋器由python2.7更換爲python3.7，BeautifulSoup包報錯 之前使用python2.7時，PyCharm用快捷鍵Alt+Enter就可以輕鬆導入BeautifulSoup；但是將項目解釋器變爲python3.7後，需要導入BeautifulSoup4 python2.7導入BeautifulSoup 當

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