know a list, ask whether each element in this list is a child of another element, and if so, delete this element. list = [ GH , ACDB , AB , ABCFE , ABDCFE , ACFE , ABCD , ABD , ACBD , ACD , FCBA , FCDBA , FCA , F...
shenjianlin@newdev:~(spider)$ lsof -i:25555 COMMAND PID USER FD TYPE DEVICE SIZE OFF NODE NAME phantomjs 17664 shenjianlin 6u IPv4 712352984 0t0 TCP *:25555 (LISTEN) shenjianlin@newdev:~(spider)$ kill -9 17664 shenjianlin@newde...
involves the calculation of a large amount of data there are multiple loops nested within the use of pandas for calculation extremely slow is there any effective way to speed up? ...
if there are multiple foreign keys in a table, such as student table, course table and score table, is it correct for me to define it this way? class Student(Base): __tablename__ = students id = Column(Integer, primary_key=True) name = ...
When pipenv manages the environment, there is an entry in pipfile [requires] python_version = "3.7" is there a syntax to write , for example, if the python version is greater than or equal to 3.5? ...
https: www.zhipin.com gongsi... topic description boss direct employment crawl work sometimes reports the verification code http: www.zhipin.com captcha... has anyone arrested it? ...
A field in the database table is an interval field in json format, such as [100,200]. How to query the data in the table field interval according to the specified number such as 167? table.query.filter. First find a solution ...
try: 1 0 print(1) except ZeroDivisionError: pass as above, I want print (1) to continue to run after ZeroDivisionError is triggered. it s not realistic to write two try. What if I have 100 print behind me? It s stupid to write 100 try. ...
topic description there are N length specifications for raw materials for example, there are 9 meters and 12 meters customers need to cut each M root of N specified length L for example: 1.2m 200m, 1.3m 80root, 1.33m 120root, 1.78m 90root find o...
as shown in the figure, where the red line is drawn, the QR code is generated through the interface. Which interface is it the business is like this. Can you scan the official QR code sent by Wechat to merchants to make the JSAPI payment (a payment...
in a plan, there are many points and some points will be connected. Please group these points. The grouping rule is: 1) there is no connection between groups 2) there must be connections between points within groups how to implement such a groupin...
python rookie, while watching the python subprocess tutorial of Liao Xuefeng, I encountered the following error report when executing nslookup command operating system: win10 python version: 3.7 import subprocess print( $ nslookup ) p = subproc...
Please design 3 to start a program to find primes in ascending order, find 100 primes, and output numbers from large to small in comma-separated order. however, the program must meet the following conditions. do not use circular syntax such as For,Wh...
Scrapy installation failure indicates that twisted cannot establish a connection, and then after checking on the Internet, it is found that the corresponding whl for twisted needs to be installed, but it still prompts the same error after successful inst...
there was a document before, in which I have to add the values automatically, but the values in it are unordered. Whenever I encounter an element with an empty value, I have to find the last value up and increase it. And cycle several times to count how...
I use Supervisor for process control etc supervisor conf.d onehomeServer.conf [program:onehomeServer] command=sudo home fanfei onehomeServer env bin gunicorn --bind unix: tmp www.fanfei.site.socket onehomeServer.asgi:application directory= home fanf...
packaged in pyinstaller import tkinter as tk jm = tk.Tk() jm.title("") jm.mainloop() ...
I have consulted a lot of articles about event monitoring mechanism on the Internet, but I don t understand the significance of this mechanism. many articles on the Internet are about how to implement them in code, or use examples from daily life to i...
problem description using luigi framework to crawl faers data reported an error, IDE is pycharm error message is No task specified Process finished with exit code 1 2. Source code import os import re import shutil import requests from io imp...
~ pyspider all [W 190226 00:03:02 run:413] phantomjs not found, continue running without it. [I 190226 00:03:04 result_worker:49] result_worker starting... Process Process-4: Traceback (most recent call last): [I 190226 00:03:04 processor:211] processor s...
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excuse me, the node third-party module request is IO-intensive or memory-intensive. Question: whether you need to start multiple processes to improve efficiency as a web crawler will a single process block? https: github.com request re. ...
background is done by service gateway and Java, because interfaces often need some field name aggregation, so there will be a lot of duplicate code for example class HomeDto{ int childId; String childName; int homeId; String homeNam...
phpstudy configuration apache and mysql display enable the service, and the command line connection can also be connected, but the following statement shows that the connection cannot be made in php: $con = mysqli_connect ( "localhost ", "root ", "roo...