Python -v 打印出垃圾信息

Question

看起来 Python 运行得非常完美...

$ python
Python 2.7.8 (default, Aug 24 2014, 21:26:19)
[GCC 4.2.1 Compatible Apple LLVM 5.1 (clang-503.0.40)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>

但是python -v命令会输出各种杂乱无章的内容：

$ python -v
# installing zipimport hook
import zipimport # builtin
# installed zipimport hook
# /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.pyc matches /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py
import site # precompiled from /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.pyc
# /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.pyc matches /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py
import os # precompiled from /u


<..................>

   /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_sysconfigdata.pyc matches /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_sysconfigdata.py
import _sysconfigdata # precompiled from /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_sysconfigdata.pyc
# /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_osx_support.pyc matches /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_osx_support.py
import _osx_support # precompiled from /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_osx_support.pyc
# zipimport: found 135 names in /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools-5.4.2-py2.7.egg
# /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/sitecustomize.pyc matches /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/sitecustomize.py
import sitecustomize # precompiled from /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/sitecustomize.pyc
# zipimport: found 135 names in /usr/local/lib/python2.7/site-packages/setuptools-5.4.2-py2.7.egg
import encodings # directory /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings
# /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/__init__.pyc matches /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/__init__.py
import encodings # precompiled from /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/__init__.pyc
# /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/codecs.pyc matches /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/codecs.py
import codecs # precompiled from /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/codecs.pyc
import _codecs # builtin
# /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/aliases.pyc matches /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/aliases.py
import encodings.aliases # precompiled from /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/aliases.pyc
# /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/utf_8.pyc matches /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/utf_8.py
import encodings.utf_8 # precompiled from /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/encodings/utf_8.pyc
Python 2.7.8 (default, Aug 24 2014, 21:26:19)
[GCC 4.2.1 Compatible Apple LLVM 5.1 (clang-503.0.40)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
dlopen("/usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/readline.so", 2);
import readline # dynamically loaded from /usr/local/Cellar/python/2.7.8_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/readline.so

我使用brew安装了所有东西。这是一台新的MacBook Pro，更新了Mavericks系统。

- imagineerThat

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你认为这不是预期的输出，是什么让你这样想？ - Ismail Badawi

可能是如何检查正在运行脚本的Python版本？的重复问题。 - martijnn2008

我不明白为什么这个问题被标记为“无法重现或由打字错误引起”。这个问题显然是由错误的假设引起的，即“-v”参数应该打印版本。 - freedev

Answer 1

如果您想查看版本信息，请使用 python -V（大写字母 V）或 python --version 命令。

- asmeurer

Answer 2

这并不是垃圾信息，你正在以详细模式加载默认的Python解释器，这些依赖项是它加载所需的。

无论在任何操作系统上，您都会从任何解释器中获得类似的堆栈信息。

从运行-h命令提供的帮助菜单中：

v：详细模式（跟踪导入语句）；还可以多次提供PYTHONVERBOSE=x以增加详细程度

- Jeff Langemeier

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手册的输出更有帮助： -v 每次初始化模块时打印一条消息，显示加载它的位置（文件名或内置模块）。当给定两次时，在搜索模块时检查每个文件时都会打印一条消息。还提供有关退出时模块清理的信息。 - Anuj Biyani

Answer 3

只需输入python --version，你是看不到它的。

- Senay