staticmethod:非绑定方法,不与类和对象绑定,类和对象都可以调用,普通函数,没有自动传值 property:一种特殊属性、访问它时会执行一段功能,用来绑定给对象的方法,将函数对象伪装成数据属性,然后返回值 反射、cbv源码简述 反射就是通过字符串的形式操作对象相关的属性. hasattr检测是否含有某属性 getattr获取属性 setattr设...
params=dict(q='Sausages',format='json')handle=urlopen('http://api.duckduckgo.com'+'?'+urlencode(params))raw_text=handle.read().decode('utf8')parsed=json.loads(raw_text)results=parsed['RelatedTopics']forrinresults:if'Text'inr:print(r['FirstURL']+' - '+r['Text']) 复制 使用requests ...
argparse模块可被用来解析命令行选项 常用来定义一个脚本的说明文档,一般我们写python脚本会通过if..else的方式来提供一个脚本说明文档,python不支持switch。所有很麻烦,其实,我们可以通过argparse来编写说明文档。 我们来看看执行一个python脚本 对于熟悉Linux的小伙伴下面的文档在熟悉不过了,这个一个标准Linxu软件包的说明...
DEFAULT_PROPERTY_CONF="-Dfile.encoding=UTF-8 -Dlogback.statusListenerClass=ch.qos.logback.core.status.NopStatusListener -Djava.security.egd=file:///dev/urandom -Ddatax.home=%s -Dlogback.configurationFile=%s"%( DATAX_HOME, LOGBACK_FILE) ENGINE_COMMAND="java -server ${jvm} %s -classpath %s...
They can also simply register that a function exists and return it unwrapped. You can use this, for example, to create a lightweight plugin architecture:Python decorators.py # ... PLUGINS = dict() def register(func): """Register a function as a plug-in""" PLUGINS[func.__name__] ...
def test_when_a_file_exists_in_the_source_but_not_the_destination(): src_hashes = {'hash1': 'fn1'} dst_hashes = {} actions = determine_actions(src_hashes, dst_hashes, Path('/src'), Path('/dst')) assert list(actions) == [('copy', Path('/src/fn1'), Path('/dst/fn1...
Thermmethod defined earlier is quite oversimplified. We’d like to have it validate that a path exists and is a file before just blindly attempting to remove it. Let’s refactorrmto be a bit smarter: #!/usr/bin/env python # -*- coding: utf-8 -*- ...
featTab = lyr_cim.featureTableiflen(featTab.fieldDescriptions) ==0:#No CIM field descriptionsprint(f'LYR desc count PRE mod: {len(featTab.fieldDescriptions)}') lyrFld = arcpy.ListFields(lyr)[0]#First fieldarcpy.management.AlterField(lyr, lyrFld.name)#Force CIM updatelyr_cim = lyr.getDef...
(client, database_id, container_id, partition_key): database = await client.create_database_if_not_exists(id=database_id) print(f'Database "{database_id}" created or retrieved successfully.') container = await database.create_container_if_not_exists(id=container_id, partition_key=...
(client, database_id, container_id, partition_key): database = await client.create_database_if_not_exists(id=database_id) print(f'Database "{database_id}" created or retrieved successfully.') container = await database.create_container_if_not_exists(id=container_id, partition_key=...