On 02/07/2016 01:16, DFS wrote:
On 7/1/2016 5:34 AM, Pierre-Alain Dorange wrote:
More reduced :
--
u=raw_input('Enter calculation:")
print eval(u)
--
works and compute :
1+2+3+4-1+4*2
2+3.0/2-0.5
Perform better and shorter, but l
Op 01-07-16 om 15:52 schreef Steven D'Aprano:
> On Fri, 1 Jul 2016 10:25 pm, Christopher Reimer wrote:
>
>> For my BASIC interpreter, each line of BASIC is broken this way into
>> tokens.
> [...]
>> By using * to unpack the split line, my program no longer crashes and no
>> try/except block is need
DFS wrote:
>
> 2 lines? Love it!
>
> But apparently eval==evil.
>
> http://nedbatchelder.com/blog/201206/eval_really_is_dangerous.html
>
> I bet you get hammered about it here on clp.
It was a software to be deploy, it was just for educational purpose.
--
Pierre-Alain Dorange
Steven D'Aprano writes:
> On Fri, 1 Jul 2016 10:25 pm, Christopher Reimer wrote:
>
>> For my BASIC interpreter, each line of BASIC is broken this way into
>> tokens.
> [...]
>> By using * to unpack the split line, my program no longer crashes and no
>> try/except block is needed to work around the
> On Jul 1, 2016, at 6:52 AM, Steven D'Aprano wrote:
>
>> On Fri, 1 Jul 2016 10:25 pm, Christopher Reimer wrote:
>>
>> For my BASIC interpreter, each line of BASIC is broken this way into
>> tokens.
> [...]
>> By using * to unpack the split line, my program no longer crashes and no
>> try/except
On Fri, 01 Jul 2016 23:52:45 +1000, Steven D'Aprano wrote:
> On Fri, 1 Jul 2016 10:25 pm, Christopher Reimer wrote:
>
>> For my BASIC interpreter, each line of BASIC is broken this way into
>> tokens.
> [...]
>> By using * to unpack the split line, my program no longer crashes and
>> no try/excep
On Fri, 1 Jul 2016 10:25 pm, Christopher Reimer wrote:
> For my BASIC interpreter, each line of BASIC is broken this way into
> tokens.
[...]
> By using * to unpack the split line, my program no longer crashes and no
> try/except block is needed to work around the crash. A later line of code
> wil
Christopher Reimer writes:
>> On Jul 1, 2016, at 5:46 AM, Jussi Piitulainen wrote:
>>
>> Christopher Reimer writes:
>>
>>> For my BASIC interpreter, each line of BASIC is broken this way into
>>> tokens.
>>>
>>> line_number, keyword, *expression = line.split(' ', 2)
>>>
>>> For a line like 10
> On Jul 1, 2016, at 5:46 AM, Jussi Piitulainen
> wrote:
>
> Christopher Reimer writes:
>
>> For my BASIC interpreter, each line of BASIC is broken this way into
>> tokens.
>>
>> line_number, keyword, *expression = line.split(' ', 2)
>>
>> For a line like 10 PRINT "HELLO, WORLD!", this works
Chris Warrick wrote:
> > More reduced :
> > --
> > u=raw_input('Enter calculation:")
> > print eval(u)
> > --
> > works and compute :
> > 1+2+3+4-1+4*2
> > 2+3.0/2-0.5
> >
> > Perform better and shorter, but less educationnal of cour
Christopher Reimer writes:
> For my BASIC interpreter, each line of BASIC is broken this way into
> tokens.
>
> line_number, keyword, *expression = line.split(' ', 2)
>
> For a line like 10 PRINT "HELLO, WORLD!", this works as expected.
>
> For a line like 20 END, which doesn't have a third elemen
> On Jun 30, 2016, at 11:42 PM, Jussi Piitulainen
> wrote:
>
> DFS writes:
>
>> Here's a related program that doesn't require you to tell it what type
>> of operation to perform. Just enter 'num1 operator num2' and hit
>> Enter, and it will parse the entry and do the math.
>>
>> -
On 1 July 2016 at 11:34, Pierre-Alain Dorange
wrote:
> DFS wrote:
>
>> Here's a related program that doesn't require you to tell it what type
>> of operation to perform. Just enter 'num1 operator num2' and hit Enter,
>> and it will parse the entry and do the math.
>>
>> -
DFS wrote:
> Here's a related program that doesn't require you to tell it what type
> of operation to perform. Just enter 'num1 operator num2' and hit Enter,
> and it will parse the entry and do the math.
>
> ---
> ui=raw_input('Enter calculation to p
On 1 July 2016 at 05:08, Elizabeth Weiss wrote:
> while True:
> print("Options:")
> print("Enter 'add' to add two numbers")
> print("Enter 'subtract' to subtract two numbers")
> print("Enter 'multiply' to multiply two numbers")
> print("Enter 'divide' to div
DFS writes:
> Here's a related program that doesn't require you to tell it what type
> of operation to perform. Just enter 'num1 operator num2' and hit
> Enter, and it will parse the entry and do the math.
>
> ---
> ui=raw_input('Enter calculation to pe
On 06/30/2016 09:08 PM, Elizabeth Weiss wrote:
> while True:
> print("Options:")
> print("Enter 'add' to add two numbers")
> print("Enter 'subtract' to subtract two numbers")
> print("Enter 'multiply' to multiply two numbers")
> print("Enter 'divide' to divide two numb
while True:
print("Options:")
print("Enter 'add' to add two numbers")
print("Enter 'subtract' to subtract two numbers")
print("Enter 'multiply' to multiply two numbers")
print("Enter 'divide' to divide two numbers")
print("Enter 'quit' to end the prog
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