blocks|key|3094478|text|如果你使用python3，也许|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3094479|apt-get+install+python3-pypdf2|code-block|syntax|javascript|3094480|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|$]]

If you use python3 maybe

<pre><code>apt-get install python3-pypdf2
</code></pre>

blocks|key|3094516|text|在我的例子中，我试图导入'PyPDF2‘而不是’PyPDF2+2‘。观察这个案子。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3094517|导入PyPDF2|blockquote|3094518|是对的。|3094519|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$]]|$1|E|3|F|5|6|7|K|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|L|8|@]|9|@]|A|$]]]|H|$]]

In my case, I was trying to import 'pyPdf2' instead of 'PyPDF2'. Observe the case.

<blockquote>
 import PyPDF2
</blockquote>

is correct.

blocks|key|2344732|text|这就是我为python3所遵循的情况。对于python2，请尝试使用pip：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2344733|pip+install+PyPDF2|code-block|syntax|javascript|2344734|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|$]]

This is the case which I followed for python3. For python2 try with pip: 

<pre><code>pip install PyPDF2
</code></pre>

blocks|key|3094617|text|我也面临着同样的问题。但就我而言，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3094618|我以前在官方网站上单独安装了Python3，使用时没有任何问题。|unordered-list-item|offset|length|3094619|然后，我安装了蟒蛇包分发软件，它本身在相应的目录中安装了另一个Python3。|3094620|因此，当我安装PyPDF2时，它正常安装，导入时抛出一个错误，因为python3的基本路径被更改为与Anaconda一起使用。|3094621|然后我打开Anaconda提示符并在那里安装了PyPDF2并尝试导入。它成功了！！|style|BOLD|3094622|然后，我可以使用它从任何命令提示符在我的Windows。否则，您可以删除Anaconda，一切正常工作。这只是我电脑里两个蟒蛇的冲突。|3094623|结论:尝试任何重叠的软件在您的电脑(在我的情况下，Anaconda提示符)，并尝试他们的CMD安装软件包和进口。如果我想安装任何软件包，我必须转到Anaconda提示符，并安装它，并导入模块在任何地方工作，没有任何错误。因此，从现在开始，我只使用Anaconda提示符作为我的默认安装提示。|3094624|entityMap|0|LINK|mutability|MUTABLE|url|https://www.python.org/downloads/|1|https://www.anaconda.com/download/^0|0|E|7|0|0|7|2|1|0|0|Z|6|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@$E|14|F|15|1|16]]|A|$]]|$1|G|3|H|5|D|7|17|8|@]|9|@$E|18|F|19|1|1A]]|A|$]]|$1|I|3|J|5|6|7|1B|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|1C|8|@$E|1D|F|1E|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|1F|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1G|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]|10|$5|V|W|X|A|$Y|11]]]]

I faced the same problem. But, In my case,

<ul>
<li>I previously installed <a href="https://www.python.org/downloads/" rel="noreferrer">Python3</a> separately from official website and was using without any issues</li>
<li>Then later I installed <a href="https://www.anaconda.com/download/" rel="noreferrer">Anaconda</a> package distribution software which itself has another Python3 installed in corresponding directory. </li>
</ul>

So, when I installed PyPDF2, it installed normally and while importing throws an error, because the base path of python3 was changed to be used with Anaconda.

Then I opened Anaconda prompt and installed PyPDF2 there and tried to import. It worked!!

Then I can use it from any command prompt in my Windows PC. Or else you can delete Anaconda and everything works normally. Its just a conflict of two pythons in my pc.

Conclusion: Try any overlapping softwares in your PC(in my case Anaconda prompt) and try their CMD to install packages and import. If I wanted to install any package I have to go to Anaconda prompt and install it and importing that modules works anywhere without any error. So from now on wards I'm only using Anaconda prompt as my default installation prompt.

blocks|key|1694920|text|当我尝试像这样导入PyPDF2时，我也遇到了这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1694921|sudo+apt-get+install+python-pypdf2|offset|length|style|CODE|1694922|当使用import+PyPDF2运行一些简单的脚本时，我会得到如下错误：|1694923|ImportError:+No+module+named+PyPDF2|1694924|解决方案是还安装pdfmerge，如下所示：|1694925|pip+install+pdfmerge|1694926|entityMap^0|0|0|Y|0|3|D|0|0|Z|0|0|0|K|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@$D|W|E|X|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|Y|8|@$D|Z|E|10|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|11|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|12|8|@$D|13|E|14|F|G]]|9|@]|A|$]]|$1|P|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|Q|$]]

I had this problem too when I tried to import PyPDF2 like this:

<code>sudo apt-get install python-pypdf2</code>

When running some simple script with <code>import PyPDF2</code>, I would get an error like this:

<code>ImportError: No module named PyPDF2</code>

The solution was to also install pdfmerge, like this:

<code>pip install pdfmerge</code>

blocks|key|2344814|text|如何在Windows、Mac和Linux上安装Python包，以便同时安装不同版本的Python|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2344815|我的Windows8.1机器上安装了多个版本的Python+(Python2.7、3.5和3.7)。这造成了问题(我应该说是混乱)。因此，在安装软件包时，必须非常明确。+Ex：|offset|length|style|BOLD|2344816|py+-3.7+-m+pip+install+PyPDF2+++#+on+Windows
python3.7+-m+pip+install+PyPDF2+#+on+Mac+and+Linux|code-block|syntax|javascript|2344817|而不是更一般的：|2344818|pip+install+PyPDF2或|CODE|2344819|pip3+install+PyPDF2|2344820|和来升级pip，在您的python版本中非常具体，比如这个|2344821|py+-3.7+-m+pip+install+--upgrade+pip+++#+on+Windows
python3.7+-m+pip+install+--upgrade+pip+#+on+Mac+and+Linux|2344822|2344823|py+-3+-m+pip+install+--upgrade+pip+++#+on+Windows
python3+-m+pip+install+--upgrade+pip+#+on+Mac+and+Linux|2344824|现在，我可以在上使用py+-3.7运行python3.7，或者在Linux上运行python3.7，并且由于我在Windows上运行py+-3.7+-m+pip+install+PyPDF2，或者在Linux或Mac上运行python3.7+-m+pip+install+PyPDF2，所以import+PyPDF2命令可以工作！以前，因为我只做了pip3+install+PyPDF2，所以import+PyPDF2命令只有在我在Windows或python3.5+on+Linux上运行py+-3.5时才能工作，这很奇怪，因为显然这是我的“默认Python3版本”，更通用的pip3+install+PyPDF2命令必须安装了PyPDF2模块。我认为这与我为所有用户安装Python3.5有关，但Python3.7只针对我的用户帐户，因此不同的pip+install命令将安装的包放置到不同的位置，3.5版本是“默认”的Python3安装位置。|2344825|请参阅这里的更多内容：https://docs.python.org/3/installing/index.html|2344826|..。使用并行安装的多个Python版本？
在Linux、Mac和其他POSIX系统上，结合-m开关使用版本化的Python命令来运行pip的适当副本：
python2+-m+pip安装SomePackage+#默认Python+2+python2.7+-m+pip安装SomePackage+#特别是Python2.7+python3+-m+pip安装SomePackage+#默认Python+3+python3.4+-m+pip安装SomePackage+#特别是Python3.4
适当的版本化的pip命令也是可用的。
在py上，结合-m开关使用-m+Python启动程序：
py+-2+-m+pip安装SomePackage+#默认Python2+py+-2.7+-m+pip安装SomePackage+#特别是Python2.7+py+-3+-m+pip安装SomePackage+#默认Python3+py+-3.4+-m+pip安装SomePackage+#特别是Python3.4|blockquote|2344827|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.python.org/3/installing/index.html^0|0|25|7|0|0|0|0|I|0|0|J|0|1|6|8|L|0|0|0|0|7|L|A|7|14|9|1U|T|33|V|41|D|4U|J|5G|D|68|I|6T|7|81|J|8R|6|AE|B|0|B|1B|0|0|1A|2|1V|3|70|3|7D|2|7J|2|7P|2|0^^$0|@$1|2|3|4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1G|8|@$D|1H|E|1I|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|1J|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1K|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1L|8|@$D|1M|E|1N|F|Q]]|9|@]|A|$]]|$1|R|3|S|5|6|7|1O|8|@$D|1P|E|1Q|F|Q]]|9|@]|A|$]]|$1|T|3|U|5|6|7|1R|8|@$D|1S|E|1T|F|G]|$D|1U|E|1V|F|G]]|9|@]|A|$]]|$1|V|3|W|5|J|7|1W|8|@]|9|@]|A|$K|L]]|$1|X|3|N|5|6|7|1X|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|J|7|1Y|8|@]|9|@]|A|$K|L]]|$1|10|3|11|5|6|7|1Z|8|@$D|20|E|21|F|G]|$D|22|E|23|F|Q]|$D|24|E|25|F|Q]|$D|26|E|27|F|Q]|$D|28|E|29|F|Q]|$D|2A|E|2B|F|Q]|$D|2C|E|2D|F|Q]|$D|2E|E|2F|F|Q]|$D|2G|E|2H|F|Q]|$D|2I|E|2J|F|Q]|$D|2K|E|2L|F|Q]|$D|2M|E|2N|F|Q]|$D|2O|E|2P|F|Q]]|9|@]|A|$]]|$1|12|3|13|5|6|7|2Q|8|@]|9|@$D|2R|E|2S|1|2T]]|A|$]]|$1|14|3|15|5|16|7|2U|8|@$D|2V|E|2W|F|Q]|$D|2X|E|2Y|F|Q]|$D|2Z|E|30|F|Q]|$D|31|E|32|F|Q]|$D|33|E|34|F|Q]|$D|35|E|36|F|Q]]|9|@]|A|$]]|$1|17|3|-4|5|6|7|37|8|@]|9|@]|A|$]]]|18|$19|$5|1A|1B|1C|A|$1D|1E]]]]

<h2>How to install Python packages on Windows, Mac, and Linux for various versions of Python which are simultaneously installed:</h2>
I have multiple versions of Python installed on my Windows 8.1 machine (Python 2.7, 3.5, and 3.7). This created problems (confusion, I should say). You must therefore be very explicit when installing packages. Ex:
<pre><code>py -3.7 -m pip install PyPDF2 # on Windows
python3.7 -m pip install PyPDF2 # on Mac and Linux
</code></pre>
INSTEAD OF the more generic:
<code>pip install PyPDF2</code> or 
<code>pip3 install PyPDF2</code>
And to upgrade pip, be very specific in your python version, like this:
<pre><code>py -3.7 -m pip install --upgrade pip # on Windows
python3.7 -m pip install --upgrade pip # on Mac and Linux
</code></pre>
INSTEAD OF the more generic:
<pre><code>py -3 -m pip install --upgrade pip # on Windows
python3 -m pip install --upgrade pip # on Mac and Linux
</code></pre>
Now, I can run python 3.7 with <code>py -3.7</code> on Windows, or with <code>python3.7</code> on Linux, and since I did <code>py -3.7 -m pip install PyPDF2</code> on Windows, or <code>python3.7 -m pip install PyPDF2</code> on Linux or Mac, the <code>import PyPDF2</code> command works! Previously, since I had only done <code>pip3 install PyPDF2</code>, the <code>import PyPDF2</code> command only worked if I ran <code>py -3.5</code> on Windows or <code>python3.5 on Linux</code>, oddly enough, since apparently that was my &quot;default Python3 version&quot; which the more generic <code>pip3 install PyPDF2</code> command must have installed the <code>PyPDF2</code> module into. I think it has something to do with the fact that I installed Python 3.5 for all users, but Python 3.7 for only my user account, so the different <code>pip install</code> commands were placing the installed packages into different locations, with the 3.5 version being the &quot;default&quot; Python3 install location.
<hr />
<h3>See more here: <a href="https://docs.python.org/3/installing/index.html" rel="nofollow noreferrer">https://docs.python.org/3/installing/index.html</a>:</h3>
<blockquote>
<h2>... work with multiple versions of Python installed in parallel?</h2>
On Linux, Mac OS X, and other POSIX systems, use the versioned Python commands in combination with the <code>-m</code> switch to run the appropriate copy of <code>pip</code>:
<pre><code>python2 -m pip install SomePackage # default Python 2
python2.7 -m pip install SomePackage # specifically Python 2.7
python3 -m pip install SomePackage # default Python 3
python3.4 -m pip install SomePackage # specifically Python 3.4
</code></pre>
Appropriately versioned <code>pip</code> commands may also be available.
On Windows, use the <code>py</code> Python launcher in combination with the <code>-m</code> switch:
<pre><code>py -2 -m pip install SomePackage # default Python 2
py -2.7 -m pip install SomePackage # specifically Python 2.7
py -3 -m pip install SomePackage # default Python 3
py -3.4 -m pip install SomePackage # specifically Python 3.4
</code></pre>
</blockquote>

blocks|key|3094673|text|当使用pip时，它通常安装在Python中，所以请尝试|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3094674|pip3+install+PyPDF2|code-block|syntax|javascript|3094675|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|$]]

When using pip, it usually gets installed in Python 2+ so try

<pre><code>pip3 install PyPDF2
</code></pre>

blocks|key|3094661|text|在切换Python编译器(+Visual代码左下角)时，我也遇到了同样的问题，并对此进行了修复。尝试不同的版本，最终它应该能工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3094662|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 had the same issue and fixed it when switching Python compiler (bottom left corner on Visual Studio Code) . Try on different versions and eventually it should work.

blocks|key|3094701|text|我在上一门乌德米课程，这里。我正在使用Anaconda提示和jupyter笔记本。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3094702|我遇到了和OP一样的问题。我为图书馆工作所做的一切：|3094703|重新启动环境|ordered-list-item|3094704|去你的anaconda+prompt|unordered-list-item|style|CODE|3094705|control+c以停止正在运行的实例|3094706|conda+activate+***your_env_here***|3094707|3094708|pip+install+PyPDF2|3094709|(在我的例子中，打开jupyer笔记本)+jupyter+notebook|3094710|您现在可以导入库，而不会出现错误。import+PyPDF2|3094711|希望这对你有用。|3094712|entityMap|0|LINK|mutability|MUTABLE|url|https://www.udemy.com/course/nlp-natural-language-processing-with-python/learn/lecture/12827469#questions/8872660^0|B|2|0|0|0|1|3|F|1|0|9|1|0|Y|1|0|0|I|0|L|G|0|H|D|0|0^^$0|@$1|2|3|4|5|6|7|18|8|@]|9|@$A|19|B|1A|1|1B]]|C|$]]|$1|D|3|E|5|6|7|1C|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|1D|8|@]|9|@]|C|$]]|$1|I|3|J|5|K|7|1E|8|@$A|1F|B|1G|L|M]]|9|@]|C|$]]|$1|N|3|O|5|K|7|1H|8|@$A|1I|B|1J|L|M]]|9|@]|C|$]]|$1|P|3|Q|5|K|7|1K|8|@$A|1L|B|1M|L|M]]|9|@]|C|$]]|$1|R|3|-4|5|6|7|1N|8|@]|9|@]|C|$]]|$1|S|3|T|5|H|7|1O|8|@$A|1P|B|1Q|L|M]]|9|@]|C|$]]|$1|U|3|V|5|H|7|1R|8|@$A|1S|B|1T|L|M]]|9|@]|C|$]]|$1|W|3|X|5|H|7|1U|8|@$A|1V|B|1W|L|M]]|9|@]|C|$]]|$1|Y|3|Z|5|6|7|1X|8|@]|9|@]|C|$]]|$1|10|3|-4|5|6|7|1Y|8|@]|9|@]|C|$]]]|11|$12|$5|13|14|15|C|$16|17]]]]

Im following a UDEMY course <a href="https://www.udemy.com/course/nlp-natural-language-processing-with-python/learn/lecture/12827469#questions/8872660" rel="nofollow noreferrer">here</a>. Im using Anaconda prompt and jupyter notebook.
I encountered the same issue as OP. What I did to have the library working:
<ol>
<li>restart the environment
<ul>
<li>go to your <code>anaconda prompt</code></li>
<li><code>control c</code> to stop the running instance</li>
<li><code>conda activate ***your_env_here***</code></li>
</ul>
</li>
<li><code>pip install PyPDF2</code></li>
<li>(in my case open the jupyer notebook) <code>jupyter notebook</code></li>
<li>You can now import the library without the error. <code>import PyPDF2</code></li>
</ol>
Hope this works for you.

blocks|key|2344904|text|我今天在做Udemy课程时遇到了同样的问题。尝试以下几点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2344905|键入此导入sys+!{sys.executable}+-m+pip安装PyPDF2|ordered-list-item|2344906|然后导入PyPDF2|2344907|希望它也对你有用。|2344908|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|M|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|N|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|O|8|@]|9|@]|A|$]]]|J|$]]

I encountered the same issue today while doing Udemy course.
try the following:
<ol>
<li>type this
import sys
!{sys.executable} -m pip install PyPDF2</li>
<li>then
import PyPDF2</li>
</ol>
Hope it works for you too.

I use Spyder, with Python 2.7, on a windows 10. I was able to install the PyPDF2 package with a conda command from my prompt. I said installation complete. Yet, If I try to run a simple import command:

<code>import PyPDF2
</code>

I get the error:

<code>ImportError: No module named PyPDF2
</code>

How can I fix this?

"no module named PyPDF2" error

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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我在windows 10上使用了带有Python2.7的Spyder，我能够从提示符中使用conda命令安装PyPDF2包。我说安装完毕。但是，如果我试图运行一个简单的import命令：import PyPDF2我知道错误：ImportError: No module named PyPDF2我怎么才能解决这个问题？

问“没有模块名为PyPDF2”错误
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回答 10

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回答 10

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问“没有模块名为PyPDF2”错误
EN