On 8/24/2017 3:54 PM, Nathan Ernst wrote:
You passed a string to "math.floor", not anything resembling a numeric
type. Try using an actual float, int or Decimal:
It would seem you did not understand the OP's question. It was not "why
did I get this traceback."
He showed the traceback as leading him to use the help builtin.
He was questioning what help() returned.
Python 3.5.2 (default, Nov 17 2016, 17:05:23)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
from math import floor
from decimal import Decimal
floor("2.3")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: a float is required
floor(2.3)
2
floor(Decimal("2.3"))
2
floor(2)
2
Remember that Python is strongly typed; you do not get automatic type
conversions from strings to numeric types such as in Perl.
Regards,
Nathan
On Thu, Aug 24, 2017 at 2:24 PM, Stefan Ram <r...@zedat.fu-berlin.de> wrote:
This is a transcript:
from math import floor
floor( "2.3" )
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: must be real number, not str
help(floor)
Help on built-in function floor in module math:
floor(...)
floor(x)
Return the floor of x as an Integral.
This is the largest integer <= x.
Is the output of »help(floor)« supposed to be a kind of
normative documentation, i.e., /the/ authoritative
documentation of »floor«?
Is there any hint in the documentation about the type
expected of arguments in a call?
Is a parameter name »x« (as used above) described
somewhere to express the requirement of a real number?
It seems, »real« means »int or float«. Is this meaning
of »real« documented somewhere?
Thanks in advance!
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