python - TypeError: can't multiply sequence by non-int of type 'float' even if already parsed with float() - 


# -*- coding: utf-8 -*- #1 kilogram : 2.205 pounds = x : y #from __future__ import division  z=0  print "****the nicest kilos pounds converter on earth****" while z==0:     select=input("1)kilos pounds\n2)pounds kilos\n")     if select==1:         y=float(raw_input('kilos: '))         print "is %f pounds\n" % y*2.205         z=int(raw_input('exit? [0/1] '))     elif select==2:         y=float(raw_input('pounds: '))         print "is %f kilos\n" % y/2.205         z=int(raw_input('exit? [0/1] '))  print "bye bye!"

why keep getting typeerror: can't multiply sequence non-int of type 'float'? isn't y converted float after catching input? can't find what's wrong code.

you interpolating string first, multiplying result:

>>> y = 2.5 >>> "is %f pounds\n" % y*2.205 traceback (most recent call last):   file "<stdin>", line 1, in <module> typeerror: can't multiply sequence non-int of type 'float'

this happens because % operator has equal operator precedence multiplication, , operators executed left right in case.

put parenthesis around multiplication:

>>> "is %f pounds\n" % (y*2.205) 'is 5.512500 pounds\n'

do same division line:

print "is %f kilos\n" % (y/2.205)

alternatively, use str.format() format values:

print "is {:f} pounds\n".format(y * 2.205)

and

print "is {:f} kilos\n".format(y / 2.205)

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