blocks|key|3279855|text|您可以通过将标准的out/error+(我不知道它会是哪一个)赋给null设备来解决这个问题。在Python语言中，标准的输出/错误文件是sys.stdout/sys.stderr，空设备是os.devnull，所以您可以这样做|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3279856|sys.stdout+=+open(os.devnull,+"w")
sys.stderr+=+open(os.devnull,+"w")|code-block|syntax|javascript|3279857|这应该会完全禁用这些错误消息。不幸的是，这也会禁用所有控制台输出。要解决此问题，请在调用get_hat()方法之前禁用输出，然后通过执行以下操作恢复输出|3279858|sys.stdout+=+sys.__stdout__
sys.stderr+=+sys.__stderr__|3279859|它将标准输出和误差恢复到它们的原始值。|3279860|entityMap^0|1X|A|28|A|2N|A|0|0|18|9|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|14|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|R|$]]

You can get around this by assigning the standard out/error (I don't know which one it's going to) to the null device. In Python, the standard out/error files are <code>sys.stdout</code>/<code>sys.stderr</code>, and the null device is <code>os.devnull</code>, so you do

<pre><code>sys.stdout = open(os.devnull, "w")
sys.stderr = open(os.devnull, "w")
</code></pre>

This should disable these error messages completely. Unfortunately, this will also disable all console output. To get around this, disable output right before calling the <code>get_hat()</code> the method, and then restore it by doing

<pre><code>sys.stdout = sys.__stdout__
sys.stderr = sys.__stderr__
</code></pre>

which restores standard out and error to their original value.

blocks|key|316920|text|下面是来自joytick.c的相关代码块(通过http://svn.seul.org/viewcvs/viewvc.cgi/trunk/src/joystick.c?view=markup&revision=2652&root=PyGame上的SVN+)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|316921|++++value+=+SDL_JoystickGetHat+(joy,+_index);
#ifdef+DEBUG
++++printf("SDL_JoystickGetHat+value:%25d:\n",+value);
#endif
++++if+(value+&+SDL_HAT_UP)+{|code-block|syntax|javascript|316922|看起来像是打开调试的问题。|316923|entityMap|0|LINK|mutability|MUTABLE|url|http://svn.seul.org/viewcvs/viewvc.cgi/trunk/src/joystick.c?view=markup&revision=2652&root=PyGame^0|N|2P|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

Here's the relevant block of code from joystick.c (via SVN at <a href="http://svn.seul.org/viewcvs/viewvc.cgi/trunk/src/joystick.c?view=markup&amp;revision=2652&amp;root=PyGame" rel="noreferrer">http://svn.seul.org/viewcvs/viewvc.cgi/trunk/src/joystick.c?view=markup&amp;revision=2652&amp;root=PyGame</a>)

<pre><code> value = SDL_JoystickGetHat (joy, _index);
#ifdef DEBUG
 printf("SDL_JoystickGetHat value:%d:\n", value);
#endif
 if (value &amp; SDL_HAT_UP) {
</code></pre>

Looks like a problem with having debugging turned on.

blocks|key|319850|text|我使用pythonw.exe+(在Windows上)而不是python.exe。在其他OSes中，也可以将输出重定向到/dev/nul。为了仍然可以看到我的调试输出，我使用了日志记录模块。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|319851|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I use pythonw.exe (on Windows) instead of python.exe.
In other OSes, you could also redirect output to /dev/nul.
And in order to still see my debug output, I am using the logging module.

blocks|key|3279912|text|正如Demolishun在answer中提到的一个已关闭的重复问题，有一个thread正在谈论这个问题。这条帖子来自2009年8月，其中一位开发人员说the+debug+code+was+left+in+on+accident。我已经从pip安装了Pygame1.9.1，调试输出仍然存在。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3279913|为了暂时解决这个问题，我从pygame.org下载了源代码，从src/joytick.c中删除了打印语句，并编译了代码。|3279914|我使用的是OSX10.7.5，这是值得的。|3279915|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/users/776788/demolishun|1|https://stackoverflow.com/questions/7012444/disable-the-pygame-console-output|2|3|http://archives.seul.org/pygame/users/Aug-2009/msg00310.html^0|2|A|0|D|6|1|11|6|2|23|12|3|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]|$A|Y|B|Z|1|10]|$A|11|B|12|1|13]|$A|14|B|15|1|16]]|C|$]]|$1|D|3|E|5|6|7|17|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|18|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|19|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]|P|$5|K|L|M|C|$N|Q]]|R|$5|K|L|M|C|$N|Q]]|S|$5|K|L|M|C|$N|T]]]]

As <a href="https://stackoverflow.com/users/776788/demolishun">Demolishun</a> mentions in an <a href="https://stackoverflow.com/questions/7012444/disable-the-pygame-console-output">answer</a> to a closed duplicate question, there is a <a href="https://stackoverflow.com/questions/7012444/disable-the-pygame-console-output">thread</a> talking about this issue. The thread is from August of 2009 and one of the developers says <a href="http://archives.seul.org/pygame/users/Aug-2009/msg00310.html" rel="nofollow noreferrer">the debug code was left in on accident</a>. I had installed Pygame 1.9.1 from pip and the debug output is still present.

To get around it for now, I downloaded the source from pygame.org, removed the print statements from src/joystick.c and compiled the code.

I am on OS X 10.7.5 for what it's worth.

blocks|key|319888|text|为了完整起见，这里有一个来自Dave+Smith's+blog的很好的解决方案|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|319889|from+contextlib+import+contextmanager
import+sys,+os

@contextmanager
def+suppress_stdout():
++++with+open(os.devnull,+"w")+as+devnull:
++++++++old_stdout+=+sys.stdout
++++++++sys.stdout+=+devnull
++++++++try:++
++++++++++++yield
++++++++finally:
++++++++++++sys.stdout+=+old_stdout|code-block|syntax|javascript|319890|这样，您就可以在任何想要抑制输出的地方使用上下文管理：|319891|print("Now+you+see+it")
with+suppress_stdout():
++++print("Now+you+don't")|319892|entityMap|0|LINK|mutability|MUTABLE|url|http://thesmithfam.org/blog/2012/10/25/temporarily-suppress-console-output-in-python/^0|E|H|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

Just for completeness, here's a nice solution from <a href="http://thesmithfam.org/blog/2012/10/25/temporarily-suppress-console-output-in-python/">Dave Smith's blog</a>:

<pre><code>from contextlib import contextmanager
import sys, os

@contextmanager
def suppress_stdout():
 with open(os.devnull, "w") as devnull:
 old_stdout = sys.stdout
 sys.stdout = devnull
 try: 
 yield
 finally:
 sys.stdout = old_stdout
</code></pre>

With this, you can use context management wherever you want to suppress output:

<pre><code>print("Now you see it")
with suppress_stdout():
 print("Now you don't")
</code></pre>

blocks|key|3279957|text|如果你在Debian或Ubuntu机器上，你可以简单地重新编译pygame而不需要消息。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3279958|cd+/tmp
sudo+apt-get+build-dep+pygame
apt-get+source+pygame
vim+pygame-1.9.1release%2Bdfsg/src/joystick.c
#+search+for+the+printf("SDL..+messages+and+put+a+//+in+front
apt-get+source+--compile+pygame
sudo+dpkg+-i+python-pygame_1.9.1release%2Bdfsg-9ubuntu1_amd64.deb|code-block|syntax|javascript|3279959|最大问候量|3279960|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If you are on a Debian or Ubuntu machine you can just simply recompile pygame without the messages. 

<pre><code>cd /tmp
sudo apt-get build-dep pygame
apt-get source pygame
vim pygame-1.9.1release+dfsg/src/joystick.c
# search for the printf("SDL.. messages and put a // in front
apt-get source --compile pygame
sudo dpkg -i python-pygame_1.9.1release+dfsg-9ubuntu1_amd64.deb
</code></pre>

Greetings
Max

blocks|key|3066978|text|为了完成查尔斯的回答，python中内置了两个上下文管理器，redirect_stdout和redirect_stderr，您可以使用它们将命令输出重定向和/或禁止输出到文件或StringIO变量。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3066979|import+contextlib

with+contextlib.redirect_stdout(None):
++++do_thing()|code-block|syntax|javascript|3066980|有关更完整的解释，请阅读the+docs|3066981|快速更新：在某些情况下传递None可能会引发一些引用错误(例如，keras.models.Model.fit调用sys.stdout.write，这将是有问题的)，在这种情况下，传递io.StringIO()或os.devnull。|BOLD|3066982|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.python.org/3/library/contextlib.html#contextlib.redirect_stdout^0|U|F|1A|F|2G|8|0|0|C|8|0|0|0|5|D|4|W|M|1K|G|2J|D|2X|A|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]|$9|10|A|11|B|C]|$9|12|A|13|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|15|8|@]|D|@$9|16|A|17|1|18]]|E|$]]|$1|M|3|N|5|6|7|19|8|@$9|1A|A|1B|B|O]|$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]|$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]|$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|P|3|-4|5|6|7|1M|8|@]|D|@]|E|$]]]|Q|$R|$5|S|T|U|E|$V|W]]]]

To complete charles's answer, there are two context managers built in to python, <code>redirect_stdout</code> and <code>redirect_stderr</code> which you can use to redirect and or suppress a commands output to a file or <code>StringIO</code> variable.
<pre><code>import contextlib

with contextlib.redirect_stdout(None):
 do_thing()
</code></pre>
For a more complete explanation read <a href="https://docs.python.org/3/library/contextlib.html#contextlib.redirect_stdout" rel="noreferrer">the docs</a>
A quick update: In some cases passing <code>None</code> might raise some reference errors (e.g. <code>keras.models.Model.fit</code> calls <code>sys.stdout.write</code> which will be problematic), in that case pass an <code>io.StringIO()</code> or <code>os.devnull</code>.

blocks|key|318968|text|基于@charleslparker的answer构建|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|318969|from+contextlib+import+contextmanager
import+sys,+os

@contextmanager
def+suppress_stdout():
++++with+open(os.devnull,+"w")+as+devnull:
++++++++old_stdout+=+sys.stdout
++++++++sys.stdout+=+devnull
++++++++try:++
++++++++++++yield
++++++++finally:
++++++++++++sys.stdout+=+old_stdout

print("Now+you+see+it")
with+suppress_stdout():
++++print("Now+you+don't")|code-block|syntax|javascript|318970|测试|style|BOLD|318971|>>>+with+suppress_stdout():
++++++++os.system('play+/mnt/Vancouver/programming/scripts/PHASER.WAV')

/mnt/Vancouver/programming/scripts/PHASER.WAV:

+File+Size:+1.84k+++++Bit+Rate:+90.4k
++Encoding:+Unsigned+PCM++
++Channels:+1+@+8-bit++++
Samplerate:+11025Hz++++++
Replaygain:+off+++++++++
++Duration:+00:00:00.16++

In:100%25++00:00:00.16+[00:00:00.00]+Out:1.79k+[!=====%7C=====!]++++++++Clip:0++++
Done.|318972|使用此命令可完全禁止os.system()输出：|CODE|318973|>>>+with+suppress_stdout():
++++++++os.system('play+/mnt/Vancouver/programming/scripts/PHASER.WAV+>/dev/null+2>&1')
>>>+##+successfully+executed

>>>+import+time
>>>+with+suppress_stdout():
++++++++for+i+in+range(3):
++++++++++++++++os.system('play+/mnt/Vancouver/programming/scripts/PHASER.WAV+>/dev/null+2>&1')
++++++++++++++++time.sleep(0.5)+
>>>+##+successfully+executed|318974|有用的(例如)发出长时间运行的脚本完成的信号。|318975|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/25061573/1904943^0|I|6|0|0|0|0|2|0|0|A|B|0|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@$A|14|B|15|1|16]]|C|$]]|$1|D|3|E|5|F|7|17|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|18|8|@$A|19|B|1A|K|L]]|9|@]|C|$]]|$1|M|3|N|5|F|7|1B|8|@]|9|@]|C|$G|H]]|$1|O|3|P|5|6|7|1C|8|@$A|1D|B|1E|K|Q]]|9|@]|C|$]]|$1|R|3|S|5|F|7|1F|8|@]|9|@]|C|$G|H]]|$1|T|3|U|5|6|7|1G|8|@]|9|@]|C|$]]|$1|V|3|-4|5|6|7|1H|8|@]|9|@]|C|$]]]|W|$X|$5|Y|Z|10|C|$11|12]]]]

Building on @charleslparker's <a href="https://stackoverflow.com/a/25061573/1904943">answer</a>:

<pre class="lang-py prettyprint-override"><code>from contextlib import contextmanager
import sys, os

@contextmanager
def suppress_stdout():
 with open(os.devnull, "w") as devnull:
 old_stdout = sys.stdout
 sys.stdout = devnull
 try: 
 yield
 finally:
 sys.stdout = old_stdout

print("Now you see it")
with suppress_stdout():
 print("Now you don't")
</code></pre>

Tests

<pre class="lang-py prettyprint-override"><code>&gt;&gt;&gt; with suppress_stdout():
 os.system('play /mnt/Vancouver/programming/scripts/PHASER.WAV')

/mnt/Vancouver/programming/scripts/PHASER.WAV:

 File Size: 1.84k Bit Rate: 90.4k
 Encoding: Unsigned PCM 
 Channels: 1 @ 8-bit 
Samplerate: 11025Hz 
Replaygain: off 
 Duration: 00:00:00.16 

In:100% 00:00:00.16 [00:00:00.00] Out:1.79k [!=====|=====!] Clip:0 
Done.
</code></pre>

Use this to completely suppress <code>os.system()</code> output:

<pre class="lang-py prettyprint-override"><code>&gt;&gt;&gt; with suppress_stdout():
 os.system('play /mnt/Vancouver/programming/scripts/PHASER.WAV &gt;/dev/null 2&gt;&amp;1')
&gt;&gt;&gt; ## successfully executed

&gt;&gt;&gt; import time
&gt;&gt;&gt; with suppress_stdout():
 for i in range(3):
 os.system('play /mnt/Vancouver/programming/scripts/PHASER.WAV &gt;/dev/null 2&gt;&amp;1')
 time.sleep(0.5) 
&gt;&gt;&gt; ## successfully executed

</code></pre>

Useful (e.g.) to signal completion of long-running scripts.

I'm using Pygame/SDL's joystick module to get input from a gamepad. Every time I call its <code>get_hat()</code> method it prints to the console. This is problematic since I use the console to help me debug and now it gets flooded with <code>SDL_JoystickGetHat value:0:</code> 60 times every second. Is there a way I can disable this? Either through an option in Pygame/SDL or suppress console output while the function calls? I saw no mention of this in the Pygame documentation.

edit: This turns out to be due to debugging being turned on when the SDL library was compiled.

How to suppress console output in Python?

Windows

Python

Ubuntu

Debian

我正在使用Pygame/SDL的操纵杆模块从游戏手柄获取输入。每次我调用它的get_hat()方法时，它都会打印到控制台。这是有问题的，因为我使用控制台来帮助我进行调试，而现在它每秒会被SDL_JoystickGetHat value:0:淹没60次。有什么方法可以禁用它吗？是通过Pygame/SDL中的一个选项还是在...

问如何在Python中抑制控制台输出？
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