spyder | 易学教程

独家 | 10个数据科学家常犯的编程错误（附解决方案）

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数据科学家是“比软件工程师更擅长统计学，比统计学家更擅长软件工程的人”。许多数据科学家都具有统计学背景，但是在软件工程方面的经验甚少。我是一名资深数据科学家，在Stackoverflow的python编程方面排名前1%，并与许多（初级）数据科学家共事。以下是我经常看到的10大常见错误，本文将为你相关解决方案：不共享代码中引用的数据对无法访问的路径进行硬编码将代码与数据混合在Git中和源码一起提交数据编写函数而不是DAG 写for循环不编写单元测试不写代码说明文档将数据保存为csv或pickle文件使用jupyter notebook 1. 不共享代码中引用的数据数据科学需要代码和数据。因此，为了让别人可以复现你的结果，他们需要能够访问到数据。道理很简单，但是很多人忘记分享他们代码中的数据。 import pandas as pd df1 = pd.read_csv('file-i-dont-have.csv') # fails do_stuff(df) 解决方案：使用d6tpipe（ https://github.com/d6t/ d6tpipe）来共享你的代码中的数据文件、将其上传到S3/web/google驱动等，或者保存到数据库，以便于别人可以检索到文件（但是不要将其添加到git，原因见下文）。 2. 对无法访问的路径进行硬编码与错误1相似

Python Spyder reset

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I was using python(x,y), which came with Spyder. Yesterday, Spyder crashed I can't figure it out how to fix it. I uninstalled python(x,y) and reinstalled, still the same problem. If I try to open Spyder I get this message: Spyder crashed during last session If Spyder does not start at all and before submitting a bug report, please try to reset setting to defaults by running Spyder with the command line option '--reset: python spyder --reset Of course, I tried to do the above, but it doesn't seem like I have Spyder in my path. When I try to put python spyder --reset in my command prompt window,

When running PyQt5 app in Spyder it always exits with -1

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I am learning to program with PyQt5. No troubles with that, but there is one annoying issue: when I start the app, I immediately get the message that an exception occurred and SystemExit: -1 is repported (see below). An exception has occurred, use %tb to see the full traceback. SystemExit: -1 /home/arnold/bin/anaconda3/envs/ml-gpu/lib/python3.5/site-packages/IPython/core/interactiveshell.py:2918: UserWarning: To exit: use 'exit', 'quit', or Ctrl-D. warn("To exit: use 'exit', 'quit', or Ctrl-D.", stacklevel=1) In [2]: %tb Traceback (most recent call last): File "<ipython-input-1-f5ccc42a06e6>",

Logging input and output in Spyder's console

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问题 I learnt data manipulation and analysis through Stata and I used the log command to record all the commands written and the output generated. Doing so I could reproduce my findings, check previous results and share it with others in pdf or txt. What to use with Python? Is there a difference if I use a Python Jupyter Notebook or Spyder? 回答1: The way to do what you want is by using the %logstart command, as described here: Log IPython output? 回答2: Stop using the python interpreter and start

visualize plotly charts in spyder

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问题 Since November 2015, plotly is Open-Source and available for python. https://plot.ly/javascript/open-source-announcement/ When trying to do some plots offline, these work in iPython Notebook (version 4.0.4) But if I try to run them in Spyder (version 2.3.8), i just get the following output: <IPython.core.display.HTML object> <IPython.core.display.HTML object> There's something wrong in my code or the iPython Terminal of Spyder still doesn't support this? Here goes the example code (taken from

'Syntax Error: invalid syntax' for no apparent reason

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I've been trying to get a fix and can't find why the error keeps appearing. Pmin,Pmax,w,fi1 and fi2 have all been assigned finite values guess=Pmin+(Pmax-Pmin)*((1-w**2)*fi1+(w**2)*fi2) When i remove this line from the code, the same error appears at the next line of code, again for no reason I can think of Edit: Here is the chunk of code I was referring to: def Psat(self, T): pop= self.getPborder(T) boolean=int(pop[0]) P1=pop[1] P2=pop[2] if boolean: Pmin = float(min([P1, P2])) Pmax = float(max([P1, P2])) Tr=T/self.typeMolecule.Tc w=0.5*(1+scipy.tanh((10**5)*(Tr-0.6))) fi1=0.5*(1-scipy.tanh(8

'import sitecustomize' failed upon starting spyder

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问题 I am trying to install python. Or actually, have installed and deinstalled it a few times now. I am using pythonxy with the spyder IDE (i am used to matlab is why i want to use spyder). The 3.3.2 python would not even start with spyder on my win8 machine, so now I have the 2.7 version installed. Spyder starts up now, but upon startup I get `'import sitecustomize' failed? in my console and python wont execute any commands I enter. After the error the startupscript keeps on going forever

Python kernel dies for second run of PyQt5 GUI

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问题 Using Spyder in Python 3.5.2 |Anaconda 4.2.0 (64-bit) Windows package. qt: 5.6.0 For first run, GUI window opens as expected For 2nd run, nothing opens, and receiving Kernel died, restarting log message. gui1.py: import sys from PyQt5.QtWidgets import QApplication, QWidget app = QApplication(sys.argv) w = QWidget() w.resize(250,150) w.show() #sys.exit(app.exec_()) app.exec_() IPhython log: runfile('F:/work/ws_python/TestProj1/gui1/gui1.py', wdir='F:/work/ws_python/TestProj1/gui1') runfile('F:

how to execute Python 3.3 script in Spyder console with variables?

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问题 how can I execute Python 3.3 script in Spyder console, and that has variables? My sample code (C:/test/myfile.py) is from sys import argv script, first, second, third = argv print("The script is called:", script) print("Your first variable is:", first) print("Your second variable is:", second) print("Your third variable is:", third) I have tried exec(open("C:\test\myfile.py").read()) - and the error I get is "ValueError: need more than 1 value to unpack. I want to supply the variables first =

downloading error using nltk.download()

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I am experimenting NLTK package using Python. I tried to downloaded NLTK using nltk.download() . I got this kind of error message. How to solve this problem? Thanks. The system I used is Ubuntu installed under VMware. The IDE is Spyder. After using nltk.download('all') , it can download some packages, but it gets error message when downloading oanc_masc To download a particular dataset/models, use the nltk.download() function, e.g. if you are looking to download the punkt sentence tokenizer, use: $ python3 >>> import nltk >>> nltk.download('punkt') If you're unsure of which data/model you need