blocks|key|3146540|text|import+sys,+time

for+i+in+xrange(0,+101,+10):
++print+'\r>>+You+have+finished+%25d%25%25'+%25+i,
++sys.stdout.flush()
++time.sleep(2)
print|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3146541|\r是回车符。您需要在print语句末尾使用逗号，以避免自动换行。最后，需要sys.stdout.flush()将缓冲区刷新到标准输出。|unstyled|offset|length|style|CODE|3146542|对于Python+3，您可以使用：|3146543|print("\r>>+You+have+finished+{}%25".format(i),+end='')|3146544|entityMap^0|0|0|2|B|5|12|I|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|R|8|@$G|S|H|T|I|J]|$G|U|H|V|I|J]|$G|W|H|X|I|J]]|9|@]|A|$]]|$1|K|3|L|5|F|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$B|C]]|$1|O|3|-4|5|F|7|10|8|@]|9|@]|A|$]]]|P|$]]

<pre><code>import sys, time

for i in xrange(0, 101, 10):
 print '\r&gt;&gt; You have finished %d%%' % i,
 sys.stdout.flush()
 time.sleep(2)
print
</code></pre>

The <code>\r</code> is the carriage return. You need the comma at the end of the <code>print</code> statement to avoid automatic newline. Finally <code>sys.stdout.flush()</code> is needed to flush the buffer out to stdout.

For Python 3, you can use:

<pre><code>print("\r&gt;&gt; You have finished {}%".format(i), end='')
</code></pre>

blocks|key|253036|text|Python+3|type|unstyled|depth|inlineStyleRanges|entityRanges|data|253037|您可以将关键字参数用于print|offset|length|style|CODE|253038|print('string',+end='\r',+flush=True)|253039|253040|end='\r'将默认的行尾行为替换为'\r'|unordered-list-item|253041|flush=True刷新缓冲区，使打印的文本立即显示。|253042|253043|253044|Python+2|253045|在2.6%2B中，您可以在脚本开头使用from+__future__+import+print_function来启用Python3行为。或者使用老方法：|253046|Python的print会在每个命令后加上一个换行符，除非您在命令后面加上一个逗号。因此，打印命令是：|253047|print+'You+have+finished+{0}%25\r'.format(percentage),|code-block|syntax|javascript|253048|注意末尾的逗号。|253049|不幸的是，Python只在一个完整的行后将输出发送到终端。以上不是完整的一行，您需要手动对其执行flush：|253050|import+sys
sys.stdout.flush()|253051|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/32032727^0|0|B|5|0|0|11|0|0|0|8|J|4|0|0|A|0|0|0|0|H|11|H|11|0|0|7|5|0|0|0|1C|5|0|0^^$0|@$1|2|3|4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1H|8|@$D|1I|E|1J|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1K|8|@$D|1L|E|1M|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|1N|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|1O|8|@$D|1P|E|1Q|F|G]|$D|1R|E|1S|F|G]]|9|@]|A|$]]|$1|N|3|O|5|M|7|1T|8|@$D|1U|E|1V|F|G]]|9|@]|A|$]]|$1|P|3|-4|5|6|7|1W|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1Z|8|@$D|20|E|21|F|G]]|9|@$D|22|E|23|1|24]]|A|$]]|$1|V|3|W|5|6|7|25|8|@$D|26|E|27|F|G]]|9|@]|A|$]]|$1|X|3|Y|5|Z|7|28|8|@]|9|@]|A|$10|11]]|$1|12|3|13|5|6|7|29|8|@]|9|@]|A|$]]|$1|14|3|15|5|6|7|2A|8|@$D|2B|E|2C|F|G]]|9|@]|A|$]]|$1|16|3|17|5|Z|7|2D|8|@]|9|@]|A|$10|11]]|$1|18|3|-4|5|6|7|2E|8|@]|9|@]|A|$]]]|19|$1A|$5|1B|1C|1D|A|$1E|1F]]]]

<h2>Python 3</h2>

You can use keyword arguments to <code>print</code>:

<code>print('string', end='\r', flush=True)</code>

<ul>
<li><code>end='\r'</code> replaces the default end-of-line behavior with <code>'\r'</code></li>
<li><code>flush=True</code> flushes the buffer, making the printed text appear immediately.</li>
</ul>

<hr>

<h2>Python 2</h2>

In 2.6+ you can use <a href="https://stackoverflow.com/a/32032727"><code>from __future__ import print_function</code></a> at the start of the script to enable Python 3 behavior. Or use the old way:

Python's <code>print</code> puts a newline after each command, unless you suppress it with a trailing comma. So, the print command is:

<pre><code>print 'You have finished {0}%\r'.format(percentage),
</code></pre>

Note the comma at the end.

Unfortunately, Python only sends the output to the terminal after a complete line. The above is not a complete line, so you need to <code>flush</code> it manually:

<pre><code>import sys
sys.stdout.flush()
</code></pre>

blocks|key|3146583|text|在linux(可能还有windows)上，你可以像这样使用curses模块。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3146584|import+time
import+curses

win+=+curses.initscr()
for+i+in+range(100):
++++win.clear()
++++win.addstr("You+have+finished+%25d%25%25"%25i)
++++win.refresh()
++++time.sleep(.1)
curses.endwin()|code-block|syntax|javascript|3146585|相对于其他更简单的技术，curses的优点是，你可以像图形程序一样在终端上绘图，因为curses提供了移动到任何x，y位置的功能，例如下面是一个简单的脚本，它更新了四个视图|3146586|import+time
import+curses

curses.initscr()

rows+=+10
cols=+30
winlist+=+[]
for+r+in+range(2):
++++for+c+in+range(2):
++++++++win+=+curses.newwin(rows,+cols,+r*rows,+c*cols)
++++++++win.clear()
++++++++win.border()
++++++++winlist.append(win)

for+i+in+range(100):
++++for+win+in+winlist:
++++++++win.addstr(5,5,"You+have+finished+-+%25d%25%25"%25i)
++++++++win.refresh()
++++time.sleep(.05)
curses.endwin()|3146587|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.python.org/library/curses.html^0|T|6|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]]]]

On linux( and probably on windows) you can use <a href="http://docs.python.org/library/curses.html" rel="nofollow noreferrer">curses</a> module like this

<pre><code>import time
import curses

win = curses.initscr()
for i in range(100):
 win.clear()
 win.addstr("You have finished %d%%"%i)
 win.refresh()
 time.sleep(.1)
curses.endwin()
</code></pre>

Benfit with curses as apposed to other simpler technique is that, you can draw on terminal like a graphics program, because curses provides moving to any x,y position e.g. below is a simple script which updates four views

<pre><code>import time
import curses

curses.initscr()

rows = 10
cols= 30
winlist = []
for r in range(2):
 for c in range(2):
 win = curses.newwin(rows, cols, r*rows, c*cols)
 win.clear()
 win.border()
 winlist.append(win)

for i in range(100):
 for win in winlist:
 win.addstr(5,5,"You have finished - %d%%"%i)
 win.refresh()
 time.sleep(.05)
curses.endwin()
</code></pre>

blocks|key|249546|text|使用sys.stdout.write()而不是打印在Python2和3中都可以正常工作，没有任何妥协。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|249547|entityMap^0|2|I|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

using <code>sys.stdout.write()</code> instead of print works in both python 2 and 3 without any compromises.

blocks|key|2931944|text|我不得不结合上面的几个答案才能让它在Python+3.7+/+Windows+10上工作。这个例子在Spyder的控制台上运行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2931945|import+sys,+time

for+i+in+range(0,+101,+5):
++print("\r>>+You+have+finished+{}%25".format(i),+end='')
++sys.stdout.flush()
++time.sleep(.2)|code-block|syntax|javascript|2931946|time.sleep(.2)只是用来模拟一些耗时的代码。|offset|length|style|CODE|2931947|entityMap^0|0|0|0|E|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I had to combine a few answers above to make it work on Python 3.7 / Windows 10. The example runs on Spyder's console:

<pre><code>import sys, time

for i in range(0, 101, 5):
 print("\r&gt;&gt; You have finished {}%".format(i), end='')
 sys.stdout.flush()
 time.sleep(.2)
</code></pre>

The <code>time.sleep(.2)</code> is just used to simulates some time-consuming code.

blocks|key|251160|text|OP未指定Py2或Py3。在Python3中，'sys‘的'import’和'sys.stdout‘调用可以替换为'flush=True'：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|251161|import+time
for+i+in+range(0,101,25):
++print("\r>>TESTING+-+{:0>3d}%25".format(i),+end='',+flush=True)
++time.sleep(.5)
print()|code-block|syntax|javascript|251162|感谢Petr+Viktorin为Python3print()显示了"flush“参数。我提交这个是因为他的Python3示例没有包含'format‘说明符。我花了一段时间才弄清楚，在我的例子中所示的‘’说明符括号之后，附加的参数会被格式化。我刚刚选择了一个3字符整数0填充在左边的示例格式。我找到的最好的Py3格式文档是：6.1.3.1.+Format+Specification+Mini-Language|offset|length|style|BOLD|251163|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.python.org/3.5/library/string.html#grammar-token-sign^0|0|0|2|D|2S|2W|4H|17|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@$I|X|J|Y|K|L]|$I|Z|J|10|K|L]]|9|@$I|11|J|12|1|13]]|A|$]]|$1|M|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

The OP didn't specify Py2 or Py3. In Python 3 the 'import' of 'sys' and the 'sys.stdout' call can be replaced with 'flush=True':

<pre><code>import time
for i in range(0,101,25):
 print("\r&gt;&gt;TESTING - {:0&gt;3d}%".format(i), end='', flush=True)
 time.sleep(.5)
print()
</code></pre>

Thanks to Petr Viktorin for showing the "flush" parameter for Python 3 print(). I submit this because his Python 3 example doesn't include a 'format' specifier. It took me awhile to figure out that the additional parameters go after the 'format' specifier parentheses as shown in my example. I just picked an example format of 3 character integer 0 filled on the left. The best doc I found for Py3 format is: <a href="https://docs.python.org/3.5/library/string.html#grammar-token-sign" rel="nofollow noreferrer">6.1.3.1. Format Specification Mini-Language</a>

Most of questions related to this topics here in SO is as follows:

<blockquote>
 How to print some information on the same line without introducing a
 new line
</blockquote>

<a href="https://stackoverflow.com/questions/3249524">Q1</a> <a href="https://stackoverflow.com/questions/493386">Q2</a>.

Instead, my question is as follows:

I expect to see the following effect,

<pre><code>&gt;&gt; You have finished 10%
</code></pre>

where the <code>10</code> keep increasing in the same time. I know how to do this in C++ but cannot
find a good solution in python.

How to reset cursor to the beginning of the same line in Python

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在SO中，与此主题相关的大多数问题如下：如何在不引入新行的情况下在同一行上打印一些信息 .相反，我的问题如下：我期望看到以下效果，>> You have finished 10%其中10在同一时间内不断增加。我知道如何在C++中做到这一点，但在python中找不到一个好的解决方案。

问如何在Python中将光标重置到同一行的开头
EN

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问如何在Python中将光标重置到同一行的开头EN