Getting milliseconds in Python

**Diez B. Roggisch** · Jul 18 '05, 09:41 PM

Re: Getting milliseconds in Python

mjs7231 wrote:
[color=blue]
> I am trying to record how long an operation takes, but can't seem to
> find a function that will allow me to record the timestamp in
> milliseconds, maybe I am looking in the wrong place?[/color]

I have no idea where you look - but the time-module has IMHO a descriptive
enough name - so look there and be a happy camper.

--
Regards,

Diez B. Roggisch

**mjs7231** · Jul 18 '05, 09:41 PM

Re: Getting milliseconds in Python

"Return the time as a floating point number expressed in seconds since
the epoch, in UTC. Note that even though the time is always returned as
a floating point number, not all systems provide time with a better
precision than 1 second. While this function normally returns
non-decreasing values, it can return a lower value than a previous call
if the system clock has been set back between the two calls. "

This is no good, I am looking for milliseconds, not seconds.. as stated
above.

**John Hunter** · Jul 18 '05, 09:41 PM

Re: Getting milliseconds in Python

>>>>> "mjs7231" == mjs7231 <mjs7231@gmail. com> writes:

mjs7231> This is no good, I am looking for milliseconds, not
mjs7231> seconds.. as stated above.

Well seconds/1000.0 = millseconds -- or are you worries about floating
point error?

7 >>> from datetime import datetime
8 >>> dt = datetime.now()
9 >>> dt.microsecond
Out[9]: 20222

Converting to milliseconds is left as an exercise for the reader...

See also the timeit module...

JDH

**Diez B. Roggisch** · Jul 18 '05, 09:41 PM

Re: Getting milliseconds in Python

mjs7231 wrote:
[color=blue]
> "Return the time as a floating point number expressed in seconds since
> the epoch, in UTC. Note that even though the time is always returned as
> a floating point number, not all systems provide time with a better
> precision than 1 second. While this function normally returns
> non-decreasing values, it can return a lower value than a previous call
> if the system clock has been set back between the two calls. "
>
> This is no good, I am looking for milliseconds, not seconds.. as stated
> above.[/color]

If your system _can_ provide better accuracy than seconds, it is returned as
fraction of a second. That is the whole point the result of time being a
float and not an int.

--
Regards,

Diez B. Roggisch

**jdonnell** · Jul 18 '05, 09:41 PM

Re: Getting milliseconds in Python

"This is no good, I am looking for milliseconds, not seconds.. as
stated
above. "

The docs are not very clear. I had the same issue when I was trying to
do the same thing, but the time and datetime modules return
milliseconds on my linux machines.

**Fredrik Lundh** · Jul 18 '05, 09:41 PM

Re: Getting milliseconds in Python

"mjs7231" <mjs7231@gmail. com> wrote:
[color=blue]
> "Return the time as a floating point number expressed in seconds since
> the epoch, in UTC. Note that even though the time is always returned as
> a floating point number, not all systems provide time with a better
> precision than 1 second. While this function normally returns
> non-decreasing values, it can return a lower value than a previous call
> if the system clock has been set back between the two calls. "
>
> This is no good, I am looking for milliseconds, not seconds.. as stated
> above.[/color]

are you sure you know what a millisecond is?

can you spot the milliseconds here:
[color=blue][color=green][color=darkred]
>>> import time
>>> time.time()[/color][/color][/color]
1108575508.234[color=blue][color=green][color=darkred]
>>> time.time()[/color][/color][/color]
1108575515.062

or here:
[color=blue][color=green][color=darkred]
>>> time.clock()[/color][/color][/color]
1.6349019714375 455[color=blue][color=green][color=darkred]
>>> time.clock()[/color][/color][/color]
2.2402415685960 024[color=blue][color=green][color=darkred]
>>> time.clock()[/color][/color][/color]
2.7715522631434 739

</F>

**Brian Beck** · Jul 18 '05, 09:41 PM

Re: Getting milliseconds in Python

mjs7231 wrote:[color=blue]
> This is no good, I am looking for milliseconds, not seconds.. as stated
> above.[/color]

That IS what you want.

seconds * 100 = milliseconds

--
Brian Beck
Adventurer of the First Order

**Fredrik Lundh** · Jul 18 '05, 09:41 PM

Re: Getting milliseconds in Python

Brian Beck wrote:
[color=blue]
> That IS what you want.
>
> seconds * 100 = milliseconds[/color]

are you sure you know what a millisecond is?

(duck)

**Amand Tihon** · Jul 18 '05, 09:42 PM

Re: Getting milliseconds in Python

Brian Beck wrote:[color=blue]
> That IS what you want.
>
> seconds * 100 = milliseconds[/color]

May I assume that this IS what you want ?

()___
()//__/)______________ ___()
||(___)//#/_/#/_/#/_/#()/||
||----|#| |#|_|#|_|#|_|| ||
||____|_|#|_|#| _|#|_|#||/||
|| |#|_|#|_|#|_|#| _||

:)

(credits to jgs, found on http://www.ascii-art.de/ascii/ab/bed.txt)

--
Amand Tihon

**Brian Beck** · Jul 18 '05, 09:42 PM

Re: Getting milliseconds in Python

Fredrik Lundh wrote:[color=blue]
> Brian Beck wrote:
>
>[color=green]
>>That IS what you want.
>>
>>seconds * 100 = milliseconds[/color]
>
>
> are you sure you know what a millisecond is?
>
> (duck)[/color]

Touché.

But it was a typo.

--
Brian Beck
Adventurer of the First Order

**Curt** · Jul 18 '05, 09:44 PM

Re: Getting milliseconds in Python

On 2005-02-16, Brian Beck <exogen@gmail.c om> wrote:[color=blue][color=green][color=darkred]
>>>
>>>seconds * 100 = milliseconds[/color]
>>
>>
>> are you sure you know what a millisecond is?
>>
>> (duck)[/color]
>
> Touché.
>
> But it was a typo.[/color]

Oh, you meant 'seconds / 100 = milliseconds'?

(canard)

**Brian Beck** · Jul 18 '05, 09:44 PM

Re: Getting milliseconds in Python

Curt wrote:[color=blue]
> Oh, you meant 'seconds / 100 = milliseconds'?
>
> (canard)[/color]

I assume you're suggesting that there are two typos in my original post
(the * and the 100)...

Despite a millisecond being a thousandth of a second, given the number
of seconds provided by the time module, he does have to *multiply* by a
thousand to get the number of milliseconds.

2 seconds * 1000 = 2000 milliseconds

So, aside from the 100 in the original post, it may look misleading, but
that is what he would need to do...

--
Brian Beck
Adventurer of the First Order

**Martin Christensen** · Jul 18 '05, 09:44 PM

Re: Getting milliseconds in Python

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
[color=blue][color=green][color=darkred]
>>>>> "Brian" == Brian Beck <exogen@gmail.c om> writes:[/color][/color][/color]
Brian> Despite a millisecond being a thousandth of a second [...]

A math teacher! A math teacher! My kingdom for a math teacher!

Martin

- --
Homepage: http://www.cs.auc.dk/~factotum/
GPG public key: http://www.cs.auc.dk/~factotum/gpgkey.txt
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.5 (GNU/Linux)
Comment: Using Mailcrypt+GnuPG <http://www.gnupg.org>

iEYEARECAAYFAkI UxPkACgkQYu1fMm OQldXH3QCdGcw3g rK/R17kfakMBhxU1Io/
4ukAoJl+gysL9q/6j1G8LYPZz7NawE V+
=1CNL
-----END PGP SIGNATURE-----

**Brian Beck** · Jul 18 '05, 09:44 PM

Re: Getting milliseconds in Python

Martin Christensen wrote:[color=blue]
> A math teacher! A math teacher! My kingdom for a math teacher!
>
> Martin[/color]

Man, this is the hottest topic on c.l.py since that Lazaridis guy...

--
Brian Beck
Adventurer of the First Order