我喜欢系统。对于这样的东西。

>>> import sys
>>> sys.hexversion
33883376
>>> '%x' % sys.hexversion
'20504f0'
>>> sys.hexversion < 0x02060000
True

已经有几个答案建议如何查询当前的python版本。为了以编程方式检查版本需求，我将使用以下两种方法之一:

# Method 1: (see krawyoti's answer)
import sys
assert(sys.version_info >= (2,6))

# Method 2: 
import platform
from distutils.version import StrictVersion 
assert(StrictVersion(platform.python_version()) >= "2.6")

该信息可在sys。sys模块中的版本字符串:

>>> import sys

人类可读的:

>>> print(sys.version)  # parentheses necessary in python 3.       
2.5.2 (r252:60911, Jul 31 2008, 17:28:52) 
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)]

如需进一步处理，请使用sys。Version_info或sys.hexversion:

>>> sys.version_info
(2, 5, 2, 'final', 0)
# or
>>> sys.hexversion
34014192

为了确保脚本以最小版本的Python解释器要求运行，在代码中添加以下内容:

assert sys.version_info >= (2, 5)

比较主要版本和次要版本信息。在元组中添加micro(= 0,1等)和releaselevel (='alpha'，'final'等)。然而，请注意，最好是“回避”检查是否有特定的功能，如果没有，就采取变通措施(或退出)。有时，新版本的特性会消失，被其他特性所取代。

只是为了好玩，下面是在CPython 1.0-3.7b2, Pypy, Jython和Micropython上的一种方法。在现代代码中，这更像是一种新奇的做法。我将其作为http://stromberg.dnsalias.org/~strombrg/pythons/的一部分编写，这是一个脚本，用于在多个版本的python上同时测试一段代码，因此您可以轻松地了解哪些python特性与哪些版本的python兼容:

via_platform = 0
check_sys = 0
via_sys_version_info = 0
via_sys_version = 0
test_sys = 0
try:
    import platform
except (ImportError, NameError):
    # We have no platform module - try to get the info via the sys module
    check_sys = 1

if not check_sys:
    if hasattr(platform, "python_version"):
        via_platform = 1
    else:
        check_sys = 1

if check_sys:
    try:
        import sys
        test_sys = 1
    except (ImportError, NameError):
        # just let via_sys_version_info and via_sys_version remain False - we have no sys module
        pass

if test_sys:
    if hasattr(sys, "version_info"):
        via_sys_version_info = 1
    elif hasattr(sys, "version"):
        via_sys_version = 1
    else:
        # just let via_sys remain False
        pass

if via_platform:
    # This gives pretty good info, but is not available in older interpreters.  Also, micropython has a
    # platform module that does not really contain anything.
    print(platform.python_version())
elif via_sys_version_info:
    # This is compatible with some older interpreters, but does not give quite as much info.
    print("%s.%s.%s" % sys.version_info[:3])
elif via_sys_version:
    import string
    # This is compatible with some older interpreters, but does not give quite as much info.
    verbose_version = sys.version
    version_list = string.split(verbose_version)
    print(version_list[0])
else:
    print("unknown")

import sys
sys.version.split(' ')[0]

sys。版本给你你想要的，只是选择第一个数字:)

from sys import version_info, api_version, version, hexversion

print(f"sys.version: {version}")
print(f"sys.api_version: {api_version}")
print(f"sys.version_info: {version_info}")
print(f"sys.hexversion: {hexversion}")

输出

sys。版本:3.6.5 (v3.6.5:f59c0932b4, march 28 2018, 17:00:18) [MSC .1900 64位(AMD64)] sys。api_version: 1013 sys。version_info: sys。Version_info (major=3, minor=6, micro=5, releaslevel ='final'， serial=0) sys。hexversion: 50726384