如何检查数据库是否已经存在 [英] How to check if database already exists

问题描述

我正在编写一个小的Python程序，该程序将一些文档加载到couchdb中. 检查是否已经存在具有特定名称的数据库将非常方便，因此我可以创建一个新数据库或打开现有数据库.我想做的是这样的:

I am writing a small Python program that loads some documents into couchdb. It would be very convenient to check whether a database with a certain name already exists, so I can either create a new one or open the existing one. What I want to do is something like this:

import couchdb

def connect(url, dbName):
    server = couchdb.Server(url)
    if dbName exists: # how do I do this?
        return server[dbName]
    else:
        return server.create(dbName)

我知道try-except块可以解决问题，但是没有更优雅的方法吗?

I know a try-except block would do the trick, but isn't there a more elegant way?

推荐答案

我能想到的最简单的方法是:

The easiest way I can think is:

import couchdb
server = couchdb.Server("http://localhost:5984")
"dataBaseName" in server

如果存在具有该名称的数据库，则返回True，否则返回False

Return True if a database with the name exists, False otherwise

https://github.com/djc/couchdb-python/blob/master/couchdb/client.py#L90-L101

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