Mac终端查看python版本号

注意: 

python语言大小写非常敏感，利用Mac终端查看版本号必须用大写的python -V

另外cocoapods是利用ruby语言写的，不是python语言。

$python -V

Python 2.7.10

如果不小心错写成小写的python -v就会打印如下一大堆信息，让人误以为Mac系统没有预装python呢？

$python -v

# installing zipimport hook

import zipimport # builtin

# installed zipimport hook

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py

import site # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py

import os # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.pyc

import errno # builtin

import posix # builtin

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/posixpath.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/posixpath.py

import posixpath # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/posixpath.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/stat.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/stat.py

import stat # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/stat.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/genericpath.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/genericpath.py

import genericpath # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/genericpath.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/warnings.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/warnings.py

import warnings # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/warnings.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/linecache.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/linecache.py

import linecache # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/linecache.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/types.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/types.py

import types # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/types.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/UserDict.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/UserDict.py

import UserDict # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/UserDict.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_abcoll.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_abcoll.py

import _abcoll # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_abcoll.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/abc.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/abc.py

import abc # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/abc.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_weakrefset.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_weakrefset.py

import _weakrefset # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_weakrefset.pyc

import _weakref # builtin

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/copy_reg.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/copy_reg.py

import copy_reg # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/copy_reg.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/traceback.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/traceback.py

import traceback # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/traceback.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sysconfig.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sysconfig.py

import sysconfig # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sysconfig.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/re.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/re.py

import re # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/re.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_compile.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_compile.py

import sre_compile # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_compile.pyc

import _sre # builtin

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_parse.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_parse.py

import sre_parse # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_parse.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_constants.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_constants.py

import sre_constants # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_constants.pyc

dlopen("/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_locale.so", 2);

import _locale # dynamically loaded from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_locale.so

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_sysconfigdata.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_sysconfigdata.py

import _sysconfigdata # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_sysconfigdata.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_osx_support.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_osx_support.py

import _osx_support # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_osx_support.pyc

import encodings # directory /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/__init__.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/__init__.py

import encodings # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/__init__.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/codecs.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/codecs.py

import codecs # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/codecs.pyc

import _codecs # builtin

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/aliases.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/aliases.py

import encodings.aliases # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/aliases.pyc

# /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/utf_8.pyc matches /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/utf_8.py

import encodings.utf_8 # precompiled from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/utf_8.pyc

Python 2.7.10 (default, Oct 23 2015, 19:19:21)

[GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)] on darwin

Type "help", "copyright", "credits" or "license" for more information.

dlopen("/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/readline.so", 2);

import readline # dynamically loaded from /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/readline.so

>>>