Question

每当我在CMD中运行程序时，都会收到缩进错误。对我来说，整个程序中的缩进看起来都很完美，所以我完全不知道为什么会收到错误。

CMD错误：

        scraper9.py", line 50
            browser.get(url2)
            ^
        IndentationError: unexpected unindent

我已完全删除所有缩进，并逐行缩进以达到当前迭代，但我仍然出错。

导入操作系统导入系统导入csv 从bs4导入BeautifulSoup 导入urllib2 导入xlsxwriter 从硒导入webdriver

            reload(sys)
            sys.setdefaultencoding("utf8")

            key_stats_on_main = ["Market Cap", "PE Ratio (TTM)"]
            key_stats_on_stat = ["Enterprise Value", "Trailing P/E"]

            stocks_arr =[]
            pfolio_file = open("tickers.csv", "r")
            for line in pfolio_file:
                indv_stock_arr = line.strip().split(",")
                stocks_arr.append(indv_stock_arr)

            print(stocks_arr)

            browser = webdriver.PhantomJS()
            stock_info_arr = []

            for stock in stocks_arr:
                stock_info = []
                ticker = stock[0]
                stock_info.append(ticker)

                url="https://finance.yahoo.com/quote/{0}?p={0}".format(ticker)
                url2="https://finance.yahoo.com/quote/{0}/key-statistics?p={0}".format(ticker)

                browser.get(url)
                innerHTML = browser.execute_script("return document.body.innerHTML")
                soup = BeautifulSoup(innerHTML, "html.parser")
                for stat in key_stats_on_main:
                    page_stat1 = soup.find(text = stat)
                    try:
                        page_row1 = page_stat1.find_parent("tr")
                        try:
                            page_statnum1 = page_row1.find_all("span")[1].contents[1]
                        except:
                            page_statnum1 = page_row1.find_all("td")[1].contents[0]
                        except:
                            print("Invalid parent for this element")
                            page_statnum1 = "N/A"
                        stock_info.append(page_statnum1)

                browser.get(url2)
                innerHTML2 = browser.execute_script("return document.body.innerHTML2")
                soup2 = BeautifulSoup(innerHTML2, "html.parser")
                for stat in key_stats_on_stat:
                    page_stat2 = soup2.find(text=stat)
                    try:
                        page_row2 = page_stat2.find_parent("tr")
                        try:
                            page_statnum2 = page_row2.find_all("span")[1].contents[0]
                        except:
                            page_statnum2 = page_row2.find_all("td")[1].content[0]
                    except:
                        print("Invalid pareent for this element")
                        page_statnum2 = "N/A"
                    stock_info.append(page_statnum2)

                stock_info_arr.append(stock_info)

            print(stock_info_arr)

            key_stats_on_main.extend(key_stats_on_stat)
            workbook = xlsxwriter.Workbook("Stocks01.xlsx")
            worksheet = workbook.add_worksheet()
            row = 0
            col = 2

            for stat in key_stats_on_main:
                worksheet.write(row, col, stat)
                col +=1

            row = 1
            col = 0
            for our_stock in stock_info_arr:
                col = 0 
                for info_bit in our_stock:
                    worksheet.write(row, col, info_bit)
                    col += 1
                row += 1
            workbook.close()
            print("Script completed")

我希望代码执行时不会出现Ineation错误。

它出错了。我很迷路。

Answer 1

您的try:缺少except:或finally:。

            for stat in key_stats_on_main:
                page_stat1 = soup.find(text = stat)
                try:  # <--------------- this one here
                    page_row1 = page_stat1.find_parent("tr")
                    try:
                        page_statnum1 = page_row1.find_all("span")[1].contents[1]
                    except:
                        page_statnum1 = page_row1.find_all("td")[1].contents[0]
                    except:
                        print("Invalid parent for this element")
                        page_statnum1 = "N/A"
                    stock_info.append(page_statnum1)
                      # <---------------- needs something here
            browser.get(url2)

您可能是说第二个except:位于第一个try:的缩进级别：

            for stat in key_stats_on_main:
                page_stat1 = soup.find(text = stat)
                try:  # <--------------- this one here
                    page_row1 = page_stat1.find_parent("tr")
                    try:
                        page_statnum1 = page_row1.find_all("span")[1].contents[1]
                    except:
                        page_statnum1 = page_row1.find_all("td")[1].contents[0]
                except:
                    print("Invalid parent for this element")
                    page_statnum1 = "N/A"
                stock_info.append(page_statnum1)

            browser.get(url2)

尝试一下！

顺便说一句，您应该减小try:子句中代码的大小，并仅捕获要处理的异常。对于您而言，AttributeError（如果.contents失败）将被第一个except:捕获。更好：

try:
    found = page_row1.find_all("span")
    index = 1
except XError:  # should be the one .find_all() can raise
    found = page_row1.find_all("td")
    index = 0
page_statnum1 = found[1].contents[index]

外部try / except的情况与此类似。

这样，您就不会隐藏其他您本来不想处理的异常。如果进行这种伪装，您将很难找出问题所在，因此请避免出现这种情况。

我不断收到缩进错误，我不应该

1 个答案: