Integer. Returns 1 if it succeeds and a negative number if an error occurs.Error values are:-1 pipe open failed-2 too partition Columns-3 table already exists-4 table does not exist-5 missing connection-6 wrong arguments-7 column Mismatch-8 fatal SQL error in Source-9 fatal SQL error in destination-10 maximum number of errors exceeded-12 bad table syntax-13 key required but not supplied-15 pipe already in progress-16 error in source database-17 error in destination Database-18 Destination databa
This article illustrates how the Linux platform PHP command-line program handles pipeline data. Share to everyone for your reference, specific as follows:
Linux has a powerful command | (Pipeline prompt). Its role is to give the result of the previous command to the latter command and as input to the latter command. Most of the commands under Linux also support
Data stream redirection in Linux and redirect (redirect) names in short for code usage standard input (standardinput) stdin0 lt ;, use the file data as input for other commands lt;, and set the string standard output (standardoutp... data stream redirection in Linux and redirect (redirect) names in short for code usage standard input stdin 0 file to restore xa
This article mainly introduces how to save collected data to mongodb using the scrapy custom pipeline class. it involves scrapy's skills in collecting and operating mongodb databases and has some reference value, for more information about how to save collected data to mongodb, see the example in this article. Share it with you for your reference. The details are
The example in this paper describes how the Scrapy custom pipeline class implements the method of saving the collected data to MongoDB. Share to everyone for your reference. Specific as follows:
# Standard Python Library imports# 3rd party modulesimport pymongofrom scrapy import logfrom scrapy.conf import SETTINGSFR Om scrapy.exceptions Import dropitemclass mongodbpipeline (object): def __init__ (self):
over.Initializepalette ();double[,] x = null;double[,] y = null;double[,] z = null;double[,] values = NULL;Creategeometrypipe (out x, off y, out z);Createvalueswaterdrops (out values);Updatemesh (x, y, z, values);V.surfacemeshseries3d.add (_mesh);V.yaxisprimary3d.units.text = "°c";_chart. EndUpdate ();SummarizeContour Topographic map can be used synthetically to judge the condition of the sight, hydrological characteristics of water system, climatic characteristics, topography and location sele
The example in this article describes the Scrapy custom pipeline class implementation method that saves data collected to MongoDB. Share to everyone for your reference. as follows:
# Standard Python Library Imports # 3rd party modules import Pymongo to scrapy import lo G from scrapy.conf Import settings from scrapy.exceptions Import Dropitem class Mongodbpipeline (object): Def __init__ (SE LF): Sel
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