rate query

[kblack...@googlemail.com]

Hi,

Sorry to pester. When I run the following example I am getting the error message "SyntaxError: Expected '(' null:

GlowScript 2.4 VPython

a = 2

try:
   
    print(int(a))
   
except ValueError:
   
    print("Error")

while True:
    rate(1)

    print("test")
 

Do you know why this wouldn't work?

Thanks again  

[kblack...@googlemail.com]

I have checked and this simpler example doesn't work.

while True:
    rate(1)
    
    try:
   
        print("test")
   
    except ValueError:
   
        print("error")

It seems to be when there is a while loop.

[Bruce Sherwood]

It is odd that when I try your first program I get  "SyntaxError: Unxpected token '(' , not  "SyntaxError: Expected '(' ,

Following up on your second program, I deleted the while loop from your first program and saw that the try/except machinery worked properly. Clearly there is some interaction between try/except and the Streamline machinery that permits the use of infinite while loops. I don't know what the solution is, or whether a solution is even possible.

[kblack...@googlemail.com]

Do you know of any way to check if a value is an integer/float that doesn't rely on try/except that works within glowscript with an infinite loop? Thanks again :)

On Monday, 6 March 2017 15:21:45 UTC, kblack...@googlemail.com wrote:

[Bruce Sherwood]

The following works in either GlowScript VPython or Jupyter VPython:

if type(x) == type(1) or type(x) == type(1.2):

     print('number')

else:

    print('not a number')

In GlowScript, the RapydScript-NG transpiler converts Python to JavaScript, and in JavaScript all numbers are in fact floats. In Jupyter, using true Python, ints and floats are two different types.

[kblack...@googlemail.com]

The following work for me. Sorry, I didn't do a good job of explaining. It was the input from the text boxes. if not isNaN(parseFloat($("#mass").val(),10))

Thank you very much for your help.

On Monday, 6 March 2017 15:21:45 UTC, kblack...@googlemail.com wrote:

[karlbl...@gmail.com]

Hi Bruce,

I have a new gmail account and have forgotten what my old one was. It was me who asked this question. I did some work that I would like to get access to. Is it still possible?

Kind regards

[Bruce Sherwood]

I think it was kblacker2520.

Bruce

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