python - 在 Python 3 中将 str 显式转换为 float

Question

我收到“TypeError:无法将‘float’对象隐式转换为 str”错误，因为我试图用字符串除以 float 。

我试图将字符串转换为 float ，但仍然出现错误。

字符串“empNumber”全是数字，但有一个逗号(例如:112,000)——因此“替换”功能会去除逗号。当我尝试划分“final/decimal”时出现错误。如何修复此类型错误？

def revPerEmployee():
    for ticker in sp500short:
        searchurl = "http://finance.yahoo.com/q/ks?s="+ticker
        f = urlopen(searchurl)
        html = f.read()
        soup = BeautifulSoup(html, "html.parser")

        searchurlemp = "http://finance.yahoo.com/q/pr?s="+ticker+"+Profile"
        femp = urlopen(searchurlemp)
        htmlemp = femp.read()
        soupemp = BeautifulSoup(htmlemp, "html.parser")

        try:
            revenue2 = soup.find("td", text="Revenue (ttm):").find_next_sibling("td").text
            empCount2 = soupemp.find("td", text="Full Time Employees:").find_next_sibling("td").text 

        except:
            revenue2 = "There is no data for this company"
            empCount2 = "There is no data for this company"         

        if revenue2 == "There is no data for this company" or empCount2 == "There is no data for this company":
            lastLetter = ticker+": There is no data for this company"
        else:
            lastLetter = revenue2[len(revenue2)-1:len(revenue2)]
            empNumber = empCount2.replace(",", "")
            decimal = float(empNumber)

        if lastLetter == "B":
            result = revenue2[:-1]
            revNum = float(result)
            final = revNum * 1000000000.0
            revPerEmp = final/decimal
            print(ticker+": "+revPerEmp)

        elif lastLetter == "M":
            result = revenue2[:-1]
            revNum = float(result)
            final = revNum * 1000000.0
            #newnum = "{:0,.2f}".format(final)
            revPerEmp = final/decimal
            print(ticker+": "+revPerEmp)

        elif lastLetter == "K":
            result = revenue2[:-1]
            revNum = float(result)
            final = revNum * 1000.0
            #newnum = "{:0,.2f}".format(final)
            revPerEmp = final/decimal
            print(ticker+": "+revPerEmp)

        else:
            print(lastLetter)

Answer 1

17 + "orange" 是废话，不能把数字和字符串相加。你要

print("%s: %s" % (ticker, revPerEmp))

(您可以将 %s 切换为其他格式，例如 %.2f)，或者

print(str(ticker) + ": " + str(revPerEmp))