version/compile info

[Skaperen]

when i start up python or python3 with no arguments to get the interactive mode, at first it outputs 2 lines of information and a line of instructions. the 2nd line appears to be compilation information. how can i get all of this information in a python script? i hope the method is the same in both python2 and python3.

[wavic]

>>> sys.version
'3.6.4 (default, Jan  5 2018, 02:35:40) \n[GCC 7.2.1 20171224]'

[Skaperen]

what did you get as a banner when you started python? is it the same?

---

Output:
lt1/forums /home/forums 1> python3
Python 3.5.2 (default, Nov 23 2017, 16:37:01) 
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.version=='[GCC 5.4.0 20160609] on linux'
False
>>> 
lt1/forums /home/forums 2> python2
Python 2.7.12 (default, Dec  4 2017, 14:50:18) 
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.version=='[GCC 5.4.0 20160609] on linux2'
False
>>> 
lt1/forums /home/forums 3>

apparently these two versions of Python were compiled on different hosts. i'm assuming that's what "linux" and "linux2" mean (maybe not). if anyone has Python on a different architecture, maybe they can show what they have.

[wavic]

what did you get as a banner when you started python? is it the same?

Python 3.6.4 (default, Jan 5 2018, 02:35:40)
[GCC 7.2.1 20171224] on linux
Type "help", "copyright", "credits" or "license" for more information.

I would say yes. Without the last line.

[DeaD_EyE]

print('Python ' + sys.version)

[ljmetzger]

According to the 2nd reference below in Python 3 documentation:

sys.version
A string containing the version number of the Python interpreter plus additional information on the build number and compiler used. This string is displayed when the interactive interpreter is started. Do not extract version information out of it, rather, use version_info and the functions provided by the platform module.

platform.python_version() Reference: https://docs.python.org/3/library/platfo...on_version
sys.version Reference: https://docs.python.org/3/library/sys.ht...ys.version
sys.version_info Reference: https://docs.python.org/3/library/sys.ht...rsion_info

The following code works in both Python 2 and Python 3:

import platform
import sys

print("platform.python_version(): {}".format(platform.python_version()))

print("sys.version:               {}".format(sys.version))
print("sys.version_info:          {}".format(sys.version_info))
print("sys.version_info.major:    {}".format(sys.version_info.major))

Output:
platform.python_version(): 2.7.13
sys.version:               2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:42:59) [MSC v.1500 32 bit (Intel)]
sys.version_info:          sys.version_info(major=2, minor=7, micro=13, releaselevel='final', serial=0)
sys.version_info.major:    2

Lewis

[ljmetzger]

Skaperen Wrote:
what did you get as a banner when you started python? is it the same?

Windows 10 - 32 bit Python:

Output:
Python 2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:42:59) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 16:07:46) [MSC v.1900 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

Lewis

[Skaperen]

Skaperen Wrote:
what did you get as a banner when you started python? is it the same?

Windows 10 - 32 bit Python:

Output:
Python 2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:42:59) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 16:07:46) [MSC v.1900 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

Lewis

does sys.version include "win32" for you?

[ljmetzger]

Skaperen Wrote:
does sys.version include "win32" for you?

64 bit Windows 10 - 32 bit Python
'win32' is returned by sys.platform

import platform
import sys
 
print("platform.python_version(): {}".format(platform.python_version()))
print("platform.platform(): {}".format(platform.platform()))
print("platform.uname(): {}".format(platform.uname()))

print("platform.system(): {}".format(platform.system()))
print("platform.release(): {}".format(platform.release()))
print("platform.version(): {}".format(platform.version()))

system = platform.system()
release = platform.release()
version = platform.version()
print("platform.system_alias(system, release, version): {}".format(platform.system_alias(system, release, version)))
 
print("")
print("sys.platform:              {}".format(sys.platform))
print("sys.version:               {}".format(sys.version))
print("sys.version_info:          {}".format(sys.version_info))
print("sys.version_info.major:    {}".format(sys.version_info.major))

Output:
platform.python_version(): 3.6.5
platform.platform(): Windows-10-10.0.16299-SP0
platform.uname(): uname_result(system='Windows', node='DESKTOP-JGK8FPV', release='10', version='10.0.16299', machine='AMD64', processor='Intel64 Family 6 Model 94 Stepping 3, GenuineIntel')ssor='Intel64 Family 6 Model 94 Stepping 3, GenuineIntel')
platform.system(): Windows
platform.release(): 10
platform.version(): 10.0.16299
platform.system_alias(system, release, version): ('Windows', '10', '10.0.16299')

sys.platform:              win32
sys.version:               3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 16:07:46) [MSC v.1900 32 bit (Intel)]
sys.version_info:          sys.version_info(major=3, minor=6, micro=5, releaselevel='final', serial=0)
sys.version_info.major:    3

Lewis

[Skaperen]

so that's where it comes from. what does the "2" mean if python3 does not have it?

Output:
lt1/forums /home/forums 1> py2
Python 2.7.12 (default, Dec  4 2017, 14:50:18) 
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.platform 
'linux2'
>>> 
lt1/forums /home/forums 2> py3
Python 3.5.2 (default, Nov 23 2017, 16:37:01) 
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.platform 
'linux'
>>> 
lt1/forums /home/forums 3>