search
HomeBackend DevelopmentPython Tutorialpymongo实现控制mongodb中数字字段做加法的方法

本文实例讲述了pymongo实现控制mongodb中数字字段做加法的方法。分享给大家供大家参考。具体分析如下:

这个非常实用,比如我们需要给文章做访问统计,可以设置一个数字字段:hit,然后每次点击后给改字段增加1即可

import pymongo
#导入pymongo 模块
conn = pymongo.Connection()
#连接本地mongodb数据库
db=conn.database #database为数据库名称
collection = db.article
#article为collection名称,相当于mysql里的表名
collection.update({'_id':ObjectId(id),'$inc':{'hit':1}})
# 为hit字段增加1

希望本文所述对大家的Python程序设计有所帮助。

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
How do you slice a Python list?How do you slice a Python list?May 02, 2025 am 12:14 AM

SlicingaPythonlistisdoneusingthesyntaxlist[start:stop:step].Here'showitworks:1)Startistheindexofthefirstelementtoinclude.2)Stopistheindexofthefirstelementtoexclude.3)Stepistheincrementbetweenelements.It'susefulforextractingportionsoflistsandcanuseneg

What are some common operations that can be performed on NumPy arrays?What are some common operations that can be performed on NumPy arrays?May 02, 2025 am 12:09 AM

NumPyallowsforvariousoperationsonarrays:1)Basicarithmeticlikeaddition,subtraction,multiplication,anddivision;2)Advancedoperationssuchasmatrixmultiplication;3)Element-wiseoperationswithoutexplicitloops;4)Arrayindexingandslicingfordatamanipulation;5)Ag

How are arrays used in data analysis with Python?How are arrays used in data analysis with Python?May 02, 2025 am 12:09 AM

ArraysinPython,particularlythroughNumPyandPandas,areessentialfordataanalysis,offeringspeedandefficiency.1)NumPyarraysenableefficienthandlingoflargedatasetsandcomplexoperationslikemovingaverages.2)PandasextendsNumPy'scapabilitieswithDataFramesforstruc

How does the memory footprint of a list compare to the memory footprint of an array in Python?How does the memory footprint of a list compare to the memory footprint of an array in Python?May 02, 2025 am 12:08 AM

ListsandNumPyarraysinPythonhavedifferentmemoryfootprints:listsaremoreflexiblebutlessmemory-efficient,whileNumPyarraysareoptimizedfornumericaldata.1)Listsstorereferencestoobjects,withoverheadaround64byteson64-bitsystems.2)NumPyarraysstoredatacontiguou

How do you handle environment-specific configurations when deploying executable Python scripts?How do you handle environment-specific configurations when deploying executable Python scripts?May 02, 2025 am 12:07 AM

ToensurePythonscriptsbehavecorrectlyacrossdevelopment,staging,andproduction,usethesestrategies:1)Environmentvariablesforsimplesettings,2)Configurationfilesforcomplexsetups,and3)Dynamicloadingforadaptability.Eachmethodoffersuniquebenefitsandrequiresca

How do you slice a Python array?How do you slice a Python array?May 01, 2025 am 12:18 AM

The basic syntax for Python list slicing is list[start:stop:step]. 1.start is the first element index included, 2.stop is the first element index excluded, and 3.step determines the step size between elements. Slices are not only used to extract data, but also to modify and invert lists.

Under what circumstances might lists perform better than arrays?Under what circumstances might lists perform better than arrays?May 01, 2025 am 12:06 AM

Listsoutperformarraysin:1)dynamicsizingandfrequentinsertions/deletions,2)storingheterogeneousdata,and3)memoryefficiencyforsparsedata,butmayhaveslightperformancecostsincertainoperations.

How can you convert a Python array to a Python list?How can you convert a Python array to a Python list?May 01, 2025 am 12:05 AM

ToconvertaPythonarraytoalist,usethelist()constructororageneratorexpression.1)Importthearraymoduleandcreateanarray.2)Uselist(arr)or[xforxinarr]toconvertittoalist,consideringperformanceandmemoryefficiencyforlargedatasets.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment