[Python-Dev] Single-file Python executables (was: Computed Goto dispatch for Python 2)

Ryan Gonzalez rymg19 at gmail.com
Thu May 28 19:32:57 CEST 2015

py2exe tends to invoke DLL hell if you have various versions of VS or Office or both installed. Because Windows.

On May 28, 2015 11:23:57 AM CDT, Chris Barker <chris.barker at noaa.gov> wrote:
>I'm confused:
>Doesn't py2exe (optionally) create a single file executable?
>And py2app on the Mac creates an application bundle, but that is
>more-or-less the equivalent on OS-X (you may not even be able to have a
>single file executable that can access the Window Manager, for
>Depending on what extra packages you need, py2exe's single file doesn't
>always work, but last I tried, it worked for a fair bit (I think all of
>I don't know what PyInstaller or others create. And I have no idea if
>is a linux option -- but it seems like the standard of practice for an
>application for linux is a bunch of files scattered over the system
>Yes, the resulting exe is pretty big, but it does try to include only
>modules and packages that are used, and that kind of optimization could
>improved in any case.
>So is something different being asked for here?
>Barry Warsaw wrote:
>>> I do think single-file executables are an important piece to
>Python's long-term
>Really? It seems to me that desktop development is dying. What are the
>critical use-cases for a single file executable?
>And I'd note that getting a good way to use Python to develop for iOS,
>Android, and Mobile Windows is FAR more critical!  -- maybe that's the
>problem ?
>On Thu, May 28, 2015 at 8:39 AM, Donald Stufft <donald at stufft.io>
>> On May 28, 2015 at 11:30:37 AM, Steve Dower
>(steve.dower at microsoft.com)
>> wrote:
>> > Donald Stufft wrote:
>> > > Well Python 3.4.3 binary is 4kb for me, so you'd have that + your
>> Python script + whatever
>> > other pieces you need.
>> >
>> > For contrast, here are the things you need on Windows to be able to
>> to an interactive
>> > prompt (I don't know how other platforms get this down to 4KB...):
>> >
>> > * python.exe (or some equivalent launcher) 39KB
>> > * python35.dll 3,788KB
>> > * vcruntime140.dll 87KB (the rest of the CRT is about 1MB, but is
>> redistributable
>> > so doesn't count here)
>> > * 26 files in Lib 343KB
>> >
>> > This gets you to ">>>", and basically everything after that is
>going to
>> fail for some reason.
>> > That's an unavoidable 4,257KB.
>> >
>> > The rest of the stdlib adds another ~16MB once you exclude the test
>> suite, so a fully functioning
>> > Python is not cheap. (Using compressed .pyc's in a zip file can
>make a
>> big difference here
>> > though, assuming you're willing to trade CPU for HDD.)
>> >
>> > Cheers,
>> > Steve
>> >
>> >
>> You don’t need a "fully functioning Python" for a single file binary,
>> only
>> need enough to actually run your application. For example, if you're
>> an application that can download files over HTTP, you don't need to
>> parts of the stdlib like xmlrpc, pickle, shelve, marshall, sqlite,
>> email,
>> mailcap, mailbox, imaplib, nntplib, etc.
>> Of course deciding which pieces you include in the zip file you're
>> appending
>> to the end of Python is up to whatever tool builds this executable
>> doesn't need to be part of Python itself. If Python itself gained the
>> ability
>> to operate in that manner than third party tools could handle trying
>to do
>> the
>> optimizations where it only includes the things it actually needs in
>> stdlib
>> and excludes things it doesn't. The key thing here is that since
>> doing
>> a single file binary, you don't need to have a Python which is
>suitable to
>> execute random Python code, you only need one that is suitable to
>> this
>> particular code so you can specialize what that includes.
>> ---
>> Donald Stufft
>> PGP: 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA
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>Christopher Barker, Ph.D.
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