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偷懒必备！只需一行代码，就能导入所有的 Python 库？


今天给大家介绍一个懒人 Python 库：Pyforest


使用一行代码，就能导入所有的 Python 库(本地已经安装的)


项目地址：https://github.com/8080labs/pyforest



/ 01 / 介绍


Python 因为有着成千上万个功能强大的开源库，备受大家的欢迎


目前，通过 PyPl 可以导入超过 23.5 万个 Python 库，数量庞大


在大家平常的实践当中，一般都是需要导入多个库或者框架来执行任务


而且每当新建一个程序文件时，都需要根据自己的需求导入相关的库


如果是相同类型的任务，比如想做一个数据可视化的小项目，可能会一直使用到某个库


如此，反复编写同一条 import 语句，就算是复制粘贴，也会感觉到麻烦，这时 Pyforest 库就可以上场了


Pyforest 是一个开源的 Python 库，可以自动导入代码中使用到的 Python 库


在进行数据可视化的时候，一般都需要导入多个库，比如 pandas、numpy、matplotlib 等等


使用了 Pyforest，每个程序文件中就不需要导入相同的 Python 库，而且也不必使用确切的导入语句


比如下面这行代码，就可以省略掉


<p style="line-height: 15px;font-size: 11px;word-spacing: -3px;letter-spacing: 0px;font-family: Consolas, Inconsolata, Courier, monospace;border-radius: 0px;color: rgb(169, 183, 198);background: rgb(40, 43, 46);padding: 0.5em;margin-left: 8px;margin-right: 8px;overflow-wrap: normal !important;word-break: normal !important;overflow: auto !important;display: -webkit-box !important;"><span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">from</span> sklearn.ensemble <span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">import</span> RandomForestClassifier<br  /></p>


在你使用 import 语句导入Pyforest 库后，你就可以直接使用所有的 Python 库


<p style="line-height: 15px;font-size: 11px;word-spacing: -3px;letter-spacing: 0px;font-family: Consolas, Inconsolata, Courier, monospace;border-radius: 0px;color: rgb(169, 183, 198);background: rgb(40, 43, 46);padding: 0.5em;margin-left: 8px;margin-right: 8px;overflow-wrap: normal !important;word-break: normal !important;overflow: auto !important;display: -webkit-box !important;"><span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">import</span> pyforest<br  /><br  />df = pd.read_csv(<span style="font-size: inherit;line-height: inherit;color: rgb(238, 220, 112);overflow-wrap: inherit !important;word-break: inherit !important;">'test.csv'</span>)<br  />print(df)</p>


你使用的任何库都不需要使用 import 语句导入，Pyforest 会为你自动导入。


只有在代码中调用库或创建库的对象后，才会导入库。如果一个库没有被使用或调用，Pyforest 将不会导入它。



/ 02 / 使用


安装，使用以下命令安装 Pyforest


<p style="line-height: 15px;font-size: 11px;word-spacing: -3px;letter-spacing: 0px;font-family: Consolas, Inconsolata, Courier, monospace;border-radius: 0px;color: rgb(169, 183, 198);background: rgb(40, 43, 46);padding: 0.5em;margin-left: 8px;margin-right: 8px;overflow-wrap: normal !important;word-break: normal !important;overflow: auto !important;display: -webkit-box !important;">pip install pyforest -i https://pypi.tuna.tsinghua.edu.cn/simple<br  /></p>


安装成功后，使用 import 语句导入它


现在，你可以直接使用相关的 Python 库，无需编写 import 导入


先以 jupiter notebook 为例，我们没有导入 pandas、seaborn 和 matplotlib 库，但是我们可以通过导入 Pyforest 库直接使用它们


偷懒必备！只需一行代码，就能导入所有的 Python 库？


读取数据，这个是国内棉花产量排行前三的省份，新疆全国第一(数据来源：国家统计局)


偷懒必备！只需一行代码，就能导入所有的 Python 库？


那么 Pyforest 可以导入所有库吗？


目前这个包包含了大部分流行的 Python 库，比如


<p style="line-height: 15px;font-size: 11px;word-spacing: -3px;letter-spacing: 0px;font-family: Consolas, Inconsolata, Courier, monospace;border-radius: 0px;color: rgb(169, 183, 198);background: rgb(40, 43, 46);padding: 0.5em;margin-left: 8px;margin-right: 8px;overflow-wrap: normal !important;word-break: normal !important;overflow: auto !important;display: -webkit-box !important;">pandas <span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">as</span> pd<br  />NumPy <span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">as</span> np<br  />matplotlob.pyplot <span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">as</span> plt<br  />seaborn <span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">as</span> sns <br  /></p>


除了这些库之外，它还提供了一些辅助的 Python 库，如 os、tqdm、re 等


如果你想查看库列表，可以使用 dir(pyforest) 进行查看，内置的是 68 个库


<p style="line-height: 15px;font-size: 11px;word-spacing: -3px;letter-spacing: 0px;font-family: Consolas, Inconsolata, Courier, monospace;border-radius: 0px;color: rgb(169, 183, 198);background: rgb(40, 43, 46);padding: 0.5em;margin-left: 8px;margin-right: 8px;overflow-wrap: normal !important;word-break: normal !important;overflow: auto !important;display: -webkit-box !important;"><span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">import</span> pyforest<br  /><br  />print(len(dir(pyforest)))<br  /><span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">for</span> i <span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">in</span> dir(pyforest):<br  />    print(i)<br  /><br  />-------------------------<br  /><span style="font-size: inherit;line-height: inherit;color: rgb(174, 135, 250);overflow-wrap: inherit !important;word-break: inherit !important;">68</span><br  />GradientBoostingClassifier<br  />GradientBoostingRegressor<br  />LazyImport<br  />OneHotEncoder<br  />Path<br  />RandomForestClassifier<br  />RandomForestRegressor<br  />SparkContext<br  />TSNE<br  />TfidfVectorizer<br  />...</p>


如果没有的话，可以进行自定义添加，在主目录中的文件写入 import 语句


示例如下


<p style="line-height: 15px;font-size: 11px;word-spacing: -3px;letter-spacing: 0px;font-family: Consolas, Inconsolata, Courier, monospace;border-radius: 0px;color: rgb(169, 183, 198);background: rgb(40, 43, 46);padding: 0.5em;margin-left: 8px;margin-right: 8px;overflow-wrap: normal !important;word-break: normal !important;overflow: auto !important;display: -webkit-box !important;">vim ~/.pyforest/user_imports.py<br  /></p>


添加语句，此处便能在代码中使用 requests 这个库


<p style="line-height: 15px;font-size: 11px;word-spacing: -3px;letter-spacing: 0px;font-family: Consolas, Inconsolata, Courier, monospace;border-radius: 0px;color: rgb(169, 183, 198);background: rgb(40, 43, 46);padding: 0.5em;margin-left: 8px;margin-right: 8px;overflow-wrap: normal !important;word-break: normal !important;overflow: auto !important;display: -webkit-box !important;"><span style="font-size: inherit;line-height: inherit;color: rgb(128, 128, 128);overflow-wrap: inherit !important;word-break: inherit !important;"># Add your imports here, line by line</span><br  /><span style="font-size: inherit;line-height: inherit;color: rgb(128, 128, 128);overflow-wrap: inherit !important;word-break: inherit !important;"># e.g</span><br  /><span style="font-size: inherit;line-height: inherit;color: rgb(128, 128, 128);overflow-wrap: inherit !important;word-break: inherit !important;"># import pandas as pd</span><br  /><span style="font-size: inherit;line-height: inherit;color: rgb(128, 128, 128);overflow-wrap: inherit !important;word-break: inherit !important;"># from pathlib import Path</span><br  /><span style="font-size: inherit;line-height: inherit;color: rgb(128, 128, 128);overflow-wrap: inherit !important;word-break: inherit !important;"># import re</span><br  /><br  /><span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">import</span> requests <span style="font-size: inherit;line-height: inherit;color: rgb(248, 35, 117);overflow-wrap: inherit !important;word-break: inherit !important;">as</span> req<br  />~                                                                               <br  />~                                                                                                                                                                                                      <br  /><span style="font-size: inherit;line-height: inherit;color: rgb(238, 220, 112);overflow-wrap: inherit !important;word-break: inherit !important;">"~/.pyforest/user_imports.py"</span> <span style="font-size: inherit;line-height: inherit;color: rgb(174, 135, 250);overflow-wrap: inherit !important;word-break: inherit !important;">7L</span>, <span style="font-size: inherit;line-height: inherit;color: rgb(174, 135, 250);overflow-wrap: inherit !important;word-break: inherit !important;">129</span>C</p>


这回我们在 PyCharm 中来实验一下。


偷懒必备！只需一行代码，就能导入所有的 Python 库？


发现 PyCharm 的自动补全的功能失效了，看来这个库还是比较适合 jupyter notebook(自动补全代码还可以使用)


除了上面这个地方可以自定义添加，还可以在库的 _import.py 文件中添加


此处以 Pyechars 为例，缩写为 chart


偷懒必备！只需一行代码，就能导入所有的 Python 库？


可视化代码如下


偷懒必备！只需一行代码，就能导入所有的 Python 库？


新疆棉花产量年年上升，其它省份年年下降...


最后 Pyforest 还提供了一些函数来了解库的使用情况


<p style="line-height: 15px;font-size: 11px;word-spacing: -3px;letter-spacing: 0px;font-family: Consolas, Inconsolata, Courier, monospace;border-radius: 0px;color: rgb(169, 183, 198);background: rgb(40, 43, 46);padding: 0.5em;margin-left: 8px;margin-right: 8px;overflow-wrap: normal !important;word-break: normal !important;overflow: auto !important;display: -webkit-box !important;"><span style="font-size: inherit;line-height: inherit;color: rgb(128, 128, 128);overflow-wrap: inherit !important;word-break: inherit !important;"># 返回已导入并且正在使用的库列表</span><br  />print(pyforest.active_imports())<br  />--------------------------------<br  />[<span style="font-size: inherit;line-height: inherit;color: rgb(238, 220, 112);overflow-wrap: inherit !important;word-break: inherit !important;">'import pandas as pd'</span>, <span style="font-size: inherit;line-height: inherit;color: rgb(238, 220, 112);overflow-wrap: inherit !important;word-break: inherit !important;">'import requests as req'</span>, <span style="font-size: inherit;line-height: inherit;color: rgb(238, 220, 112);overflow-wrap: inherit !important;word-break: inherit !important;">'import pyg2plot'</span>]<br  /><br  /><br  /><span style="font-size: inherit;line-height: inherit;color: rgb(128, 128, 128);overflow-wrap: inherit !important;word-break: inherit !important;"># 返回pyforest中所有Python库的列表</span><br  />print(pyforest.lazy_imports())<br  />--------------------------------<br  />[<span style="font-size: inherit;line-height: inherit;color: rgb(238, 220, 112);overflow-wrap: inherit !important;word-break: inherit !important;">'import glob'</span>, <span style="font-size: inherit;line-height: inherit;color: rgb(238, 220, 112);overflow-wrap: inherit !important;word-break: inherit !important;">'import numpy as np'</span>, <span style="font-size: inherit;line-height: inherit;color: rgb(238, 220, 112);overflow-wrap: inherit !important;word-break: inherit !important;">'import matplotlib.pyplot as plt'</span>...]</p>


只有代码中有使用到的库，程序才会 import 进去，否则不会导入的哦！



/ 03 / 总结


好了，到此本期的分享就结束了


使用 Pyforest 库有时候确实是可以节省一些时间，不过也是有弊端存在的。比如调试的时候(大型项目)，可能会很痛苦，不知道是哪里来的库


所以建议大家，在一些独立的脚本程序中使用，效果应该还是不错的


万水千山总是情，点个  👍  行不行



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  • 8).再见Python！我要学Go了！2500字深度分析！

  • 9).发现一个舔狗福利！这个Python爬虫神器太爽了，自动下载妹子图片


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data-darkmode-original-color-15900529136199="rgb(51, 51, 51)" data-darkmode-bgimage-15900529136199="1" style="max-width: 100%;font-size: 14px;color: rgb(51, 51, 51);text-align: left;box-sizing: border-box !important;overflow-wrap: break-word !important;"><span style="max-width: 100%;font-family: 楷体, 楷体_GB2312, SimKai;white-space: pre-wrap;font-size: 12px;box-sizing: border-box !important;overflow-wrap: break-word !important;">点阅读原文,领全套AI资料！</span></section></section></section></section></section></section></section>

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