blocks|key|4477372|text|可以，您可以将所有的打印语句放入一个if结构中，例如.|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4477373|if+printStuff:
++++print+'I+dont+like+baseball'
++++print+'I+love+it!'|code-block|syntax|javascript|4477374|然后，如果要打印，只需将printStuff设置为True；如果不想打印，则将其设置为False。|4477375|entityMap^0|I|2|0|0|C|A|P|4|17|5|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|N|$]]

Yes, you could put all the print statements into an <code>if</code> structure eg..

<pre><code>if printStuff:
 print 'I dont like baseball'
 print 'I love it!'
</code></pre>

Then it is just a matter of setting <code>printStuff</code> to <code>True</code> if you want to print or <code>False</code> if you dont.

blocks|key|4478163|text|您可以使用全部替换来用#print(替换print(。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4478164|当您准备好再次打印时，可以执行相反的操作:用print(替换#print(。|4478165|entityMap^0|B|7|K|6|0|M|6|U|7|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|I|$]]

You could use Replace All to replace <code>print(</code> with <code>#print(</code>.

When you're ready to print again, you could do the opposite: Replace <code>#print(</code> with <code>print(</code>.

blocks|key|4478170|text|您是否可以创建一个全局变量，您可以检查该变量以决定要打印多少内容？通过这样做，您可以根据需要控制日志记录量。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4478171|++if+printLevel+>+3:
++++++print("Bobby+hits+a+fly+ball+for+an+out")|code-block|syntax|javascript|4478172|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Can you create a global variable which you can check to decide how much you want to print ? By doing that you can control the amount of logging as you require.

<pre><code> if printLevel &gt; 3:
 print("Bobby hits a fly ball for an out")
</code></pre>

blocks|key|4478184|text|一个黑客，当然，但为什么不覆盖一段时间的打印功能呢？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4478185|#the+line+below+needs+to+be+the+first+in+the+file
#and+is+required+on+Python+2.7
from+__future__+import+print_function

def+to_null(*args,+**kwds):
++++pass

def+test1(x):
++++print+("test1(%25s)"+%25+(x))


#override+the+print+
old_print+=+__builtins__.print
__builtins__.print+=+to_null

test1("this+wont+print")

#restore+it
__builtins__.print+=+old_print

test1("this+will+print")|code-block|syntax|javascript|4478186|输出：|4478187|test1(this+will+print)|4478188|另请参阅Is+it+possible+to+mock+Python's+built+in+print+function?|offset|length|4478189|最后，使用日志模块的建议是正确的。尽管该模块很难很好地使用。|4478190|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/12998908/is-it-possible-to-mock-pythons-built-in-print-function^0|0|0|0|0|4|1K|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@]|9|@$M|13|N|14|1|15]]|A|$]]|$1|O|3|P|5|6|7|16|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

A hack, sure, but why not override the print function for a while?

<pre><code>#the line below needs to be the first in the file
#and is required on Python 2.7
from __future__ import print_function

def to_null(*args, **kwds):
 pass

def test1(x):
 print ("test1(%s)" % (x))


#override the print 
old_print = __builtins__.print
__builtins__.print = to_null

test1("this wont print")

#restore it
__builtins__.print = old_print

test1("this will print")
</code></pre>

output:

<pre><code>test1(this will print)
</code></pre>

see also <a href="https://stackoverflow.com/questions/12998908/is-it-possible-to-mock-pythons-built-in-print-function">Is it possible to mock Python&#39;s built in print function?</a>

Finally, the suggestion to use the logging module is spot-on. Though that module can be tricky to use well.

blocks|key|4478242|text|您可以使用日志记录模块来执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4478243|https://docs.python.org/3/library/logging.html|offset|length|4478244|https://docs.python.org/3/howto/logging.html#logging-basic-tutorial|4478245|日志记录模块有几个不同的级别。|4478246|级别-数值|4478247|危急-50|4478248|错误-+40|4478249|警告--30|4478250|信息-20|4478251|调试-10|4478252|NOTSET+-0|4478253|您可以为消息指定一个级别。例如，logging.info("Debug")是打印"Debug"的INFO级消息。如果记录器的级别小于或等于消息的级别，则将打印消息。|style|CODE|4478254|因此，如果您想关闭一组打印语句，您只需将这些语句设置为相同的级别，然后将记录器设置为更高的级别。|4478255|>>>import+logging

>>>T=logging.getLogger()+++++++++++++++++#create+a+new+logger+object
#Set+the+logger+level+to+INFO+-+note+basicConfig+only+works+once!!!
#Then+you+must+use+setLevel+method+to+change+the+level
>>>logging.basicConfig(format='%25(levelname)s:%25(message)s',+level=logging.INFO)
>>>logging.info("INFO")+++++++++++++++++#this+prints+because+the+logger+is+set+to+INFO
INFO:Info
>>>logging.warning("Warning")
WARNING:Warning

>>>T.setLevel(logging.WARNING)++++++#set+the+logger+level+to+WARNING
>>>logging.info("Debug")++++++++++++#Does+not+print+since+logger+level+WARNING+is+higher+than+message+level+INFO
>>>logging.warning("Warning")
WARNING:Warning|code-block|syntax|javascript|4478256|entityMap|0|LINK|mutability|MUTABLE|url|1^0|0|0|1A|0|0|0|1V|1|0|0|0|0|0|0|0|0|0|G|L|14|7|0|0|0^^$0|@$1|2|3|4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1H|8|@]|9|@$D|1I|E|1J|1|1K]]|A|$]]|$1|F|3|G|5|6|7|1L|8|@]|9|@$D|1M|E|1N|1|1O]]|A|$]]|$1|H|3|I|5|6|7|1P|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1R|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1S|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1T|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1U|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1V|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|1W|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|1X|8|@$D|1Y|E|1Z|Z|10]|$D|20|E|21|Z|10]]|9|@]|A|$]]|$1|11|3|12|5|6|7|22|8|@]|9|@]|A|$]]|$1|13|3|14|5|15|7|23|8|@]|9|@]|A|$16|17]]|$1|18|3|-4|5|6|7|24|8|@]|9|@]|A|$]]]|19|$1A|$5|1B|1C|1D|A|$1E|C]]|1F|$5|1B|1C|1D|A|$1E|G]]]]

You can use the logging module for this:

<a href="https://docs.python.org/3/library/logging.html" rel="nofollow noreferrer">https://docs.python.org/3/library/logging.html</a>

<a href="https://docs.python.org/3/howto/logging.html#logging-basic-tutorial" rel="nofollow noreferrer">https://docs.python.org/3/howto/logging.html#logging-basic-tutorial</a>

The logging module has several different levels.

Level --------- Numeric value

CRITICAL ---50

ERROR ----- 40

WARNING --30

INFO ---------20

DEBUG -----10

NOTSET -----0

You assign messages a level. For instance, <code>logging.info("Debug")</code> is an INFO level message which prints <code>"Debug"</code>. If the level of the logger is less than or equal to the level of the message, the message will be printed.

So if you want to turn a bunch of print statements off, you would just make the statements all the same level, and then turn the logger to a higher level. 

<pre><code>&gt;&gt;&gt;import logging

&gt;&gt;&gt;T=logging.getLogger() #create a new logger object
#Set the logger level to INFO - note basicConfig only works once!!!
#Then you must use setLevel method to change the level
&gt;&gt;&gt;logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.INFO)
&gt;&gt;&gt;logging.info("INFO") #this prints because the logger is set to INFO
INFO:Info
&gt;&gt;&gt;logging.warning("Warning")
WARNING:Warning

&gt;&gt;&gt;T.setLevel(logging.WARNING) #set the logger level to WARNING
&gt;&gt;&gt;logging.info("Debug") #Does not print since logger level WARNING is higher than message level INFO
&gt;&gt;&gt;logging.warning("Warning")
WARNING:Warning
</code></pre>

blocks|key|4477553|text|Python的print输出到sys.stdout。您可以为STDOUT设置自己的缓冲区。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4477554|#+assuming+python3
import+sys
import+io

my_buffer+=+io.StringIO()
sys.stdout+=+my_buffer

#+print+some+stuff
stuff_to_print+=+['foo',+'word',+'test']
for+word+in+stuff_to_print:
++++print(word)

#+all+the+other+stuff+your+script+does

#+change+stdout+back+to+original+so+print+is+pointing+back+to+original+buffer
sys.stdout+=+sys.__stdout__

#+now+print+everything+out+at+once
print(my_buffer.get_value())|code-block|syntax|javascript|4477555|entityMap^0|7|5|F|A|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

Python's <code>print</code> outputs to <code>sys.stdout</code>. You can put your own buffer for STDOUT.

<pre><code># assuming python3
import sys
import io

my_buffer = io.StringIO()
sys.stdout = my_buffer

# print some stuff
stuff_to_print = ['foo', 'word', 'test']
for word in stuff_to_print:
 print(word)

# all the other stuff your script does

# change stdout back to original so print is pointing back to original buffer
sys.stdout = sys.__stdout__

# now print everything out at once
print(my_buffer.get_value())
</code></pre>

I'm currently learning Python and began a project to create a baseball sim for the 2000-2005 MLB showdown card game. The programs contains events of the baseball game as print statements in the middle of separate pieces of code ("Jeff hits a single", "Bobby hits a fly ball for an out", etc). I often will take out the print statements if I want to run a lot of games at once. My goal, for feasibility reasons, is to tell Python to not print certain statements (say, in a specific span of lines) even though the code says print " ". Is this possible?

example:

<pre><code>while numberofgames &lt; 1000:
 [do not print any statements here]
 ---baseball games---
end of while loop
</code></pre>

THEN: print simulation results

Python -> Telling a program with print statements to "not print"

Python

我目前正在学习Python，并开始了一个项目，为2000-2005年的MLB对决纸牌游戏创建一个棒球模拟程序。这些程序将棒球比赛的事件作为打印语句包含在不同的代码片段中间("Jeff击打一次单打“、"Bobby击打一个飞球出局”等)。如果我想同时运行多个游戏，我经常会去掉print语句。出于可行性的原因，我的目标是告诉...

问Python告诉带有->语句的程序“不打印”
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