Row and column selection of DataFrame of pandas

Pandas can be selected according to the column name, or according to the position of the column (number, in the row and column, note that the position of pandas column starts from 0). The correlation functions are as follows: 1) loc, based on the column label, select a specific row (based on the row index); 2) iloc, position ...

Posted on Thu, 23 Jan 2020 08:47:58 -0800 by my800stuff

New Year's Eve Special Edition teaches you how to develop WeChat Public Number

Article Directory Article Subject Setting up development environment Access to WeChat Public Platform Fill in server configuration Verify that the message really came from the WeChat server receive messages Reply message Chat Robot Reply to Text Message Custom Menu Menu response Template message S ...

Posted on Thu, 23 Jan 2020 21:20:34 -0800 by stig1

The solution of Sqlachemy cannot be queried in other functions in Flask

Interception of error information: File "D:\python 3.5\lib\site-packages\flask_sqlalchemy\__init__.py", line 912, in get_app 'No application found. Either work inside a view function or push' RuntimeError: No application found. Either work inside a view function or push an application context. See http://flask-sqlalchemy.pocoo.org/con ...

Posted on Thu, 23 Jan 2020 07:20:59 -0800 by Lefu

[freecodecamp] Exact Change cash register program

Requirement A cash register is designed, which takes the purchase price as the first parameter, the cash as the second parameter, and the change in the cash register as the third parameter cid is a two-dimensional array that holds the currently available change Returns the string "Insufficient Funds" when there is ...

Posted on Thu, 23 Jan 2020 06:44:19 -0800 by newbieaj

2020 zero base to rapid development of Vue, quanjiatong, e-commerce management system (element UI) Order Management

Article directory 1, introduction 2. Classification parameters 2.1 rendering order list page by route 2.2 get the order data list by page 2.3 rendering order table table 2.4 realize paging function 2.5 realize the data linkage effect of provincial, urban and county 2.6 display logistics progress dia ...

Posted on Thu, 23 Jan 2020 07:21:03 -0800 by jqa