scrapy configuration parameters (settings.py)

Import Configuration How do I gracefully import settings.py configuration parameters from scrapy?You can't always use from scrapy import settings or from scrapy.settings import XXX.It doesn't look like anything. scrapy provides a way to import settings: from_crawler @classmethod def from_crawler(cls, crawler): server = crawler.settings.get('S ...

Posted on Mon, 18 May 2020 10:03:15 -0700 by rgriffin3838

Python notes: making dashboard to monitor sales achievement rate

Our department will hold a monthly operation analysis meeting every month, so it is necessary to make a PPT report. As we all know, it will be more persuasive to quote data in PPT according to the facts. However, adding some cool and reasonable visual charts will add a lot of color (more visual impact)! First, install the pyecharts and Gauge m ...

Posted on Tue, 05 May 2020 16:41:59 -0700 by invisionx

EffectivePython: str and bytes, generator expression, enumerate

1. Thinking in a pythonic way """View version""" import sys print(sys.version_info) print(sys.version) sys.version_info(major=3, minor=6, micro=3, releaselevel='final', serial=0) 3.6.3 |Anaconda custom (64-bit)| (default, Oct 15 2017, 03:27:45) [MSC v.1900 64 bit (AMD64)] """Modify path""" import os os.getcwd() os.chdir(r'C:\Users\Xiao ...

Posted on Mon, 04 May 2020 08:09:56 -0700 by bubblenut

Make a word cloud map generator here to send to you (with code), suggest collecting

Preface The text and pictures of this article are from the Internet, only for learning and communication, not for any commercial purpose. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. Author: Yankai If you want to learn Python or are learning python, there are many Python tutori ...

Posted on Sat, 02 May 2020 10:33:47 -0700 by gdboling

python learning note 1

According to a THU God who knows how to answer with high votehttp://nbviewer.jupyter.org/github/lijin-THU/notes-python/tree/master/ Just sort out something I don't think I'm familiar with For acmer or some children's shoes familiar with C + +, I think there should be some references I think python is a future language. One day, it will replace ...

Posted on Mon, 06 Apr 2020 00:47:48 -0700 by wyrd33

This article records the exercises of Liao Xuefeng's python course (9)

IO programming File read and write I don't need to go into details after contacting here, just go to the code: # -*- coding: utf-8 -*- """ Created on Tue Feb 27 13:38:02 2018 @author: xuanxuan """ #open a file ''' def main(): file=open("E:/pyhtonworkspace/py3-pratice/bymyself_practice/python_Liaoxuefeng/2018022 ...

Posted on Thu, 02 Apr 2020 00:04:52 -0700 by alchemist_fr

python learning notes (2): numpy Foundation

Counter function can count the number of data in the list Most common (10) can extract the top ten bits from collections import Counter a = ['q','q','w','w','w'] count = Counter(a) count.most_common(1) [('w', 3)] count Counter({'q': 2, 'w': 3}) The series object in panda has a value "counts method to count The. fillna() function can rep ...

Posted on Tue, 31 Mar 2020 16:48:30 -0700 by ChrisF79

Using Python visual artifact plot to dynamically demonstrate the trend of global epidemic

data sources The epidemic data comes from open source projects Akshare. Preparation Operating environment: Windows 10 system Anaconda(Python 3.7) Jupyter Notebook Python library used this time: akshare, panda, plotly Data import import akshare as ak import pandas as pd import plotly from plotl ...

Posted on Tue, 10 Mar 2020 02:05:43 -0700 by pvtpyro

Caffe: CMake source compilation (OpenCV4.2+CUDA)

I spent two days at home on Saturdays and Sundays, getting a glimpse of some of pycaffe's interfaces and api settings, but there's still a lot of detail to pay attention to for different layers, so I'm also going to write a blog that specifically summarizes pycaffe's common layer parameter settings. (LZ ...

Posted on Sun, 23 Feb 2020 16:15:05 -0800 by Juan Dela Cruz

Using Pandas Library in python to implement a commodity futures grid strategy

Pandas is a NumPy based tool created to solve data analysis tasks. Pandas incorporates a large number of libraries and some standard data models, providing the tools needed to efficiently operate large datasets. Pandas provides a large number of functions and methods that enable us to process data quickly and conveniently. You will soon find th ...

Posted on Fri, 21 Feb 2020 21:52:37 -0800 by el-sid