Don't understand why this TypeError: must be str, not float exception occurs

Question

st1= str()
c1= str()
c2= str()
EndCash = float()

page = requests.get('http://www.xe.com/currencyconverter/convert/?Amount=' +
                    str(st1) + '&From=' + (c1) + '&To=' + (c2))
tree = html.fromstring(page.content)
rate = tree.xpath('//span[@class="uccResultAmount"]/text()')
symbol = tree.xpath('//span[@class="uccToCurrencyCode"]/text()')

EndCash = rate + symbol

I am using the requests module and lxml to harvest currency rates from the Internet. I am encountering problems when doing this. I am getting a must be str, not float error. I'm using this line of code for a label in tkinter so the output of this, which is EndCash , should appear in the label. This code works independently but in tkinter it does not work

>>>TypeError: must be str, not float

on first statememt.

Answer 1

like this your code should work, you have to trasform floats to string after defining them

page = requests.get('http://www.xe.com/currencyconverter/convert/?Amount=' + str(st1) + '&From='+str(c1) +'&To=' + str(c2))
tree = html.fromstring(page.content)
rate = tree.xpath('//span[@class="uccResultAmount"]/text()')
symbol = tree.xpath('//span[@class="uccToCurrencyCode"]/text()')

EndCash = str(rate + symbol)