从变量中获取对象的函数并执行
单纯的执行方法可以用 eval()、locals()、globals()
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3eval(func)() # func 为变量值
locals()[func]()
globals()[func]()而从对象中执行方法用
__getattribute__1
chrome.__getattribute__(itemParser) # 对象.__getattribute__(变量值)
使用场景
从变量中读取函数名并执行,提高复用度
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51config = [{'name': 'qncyw', 'url': 'https://www.qncyw.com/site/signup',
'parser': 'selector',
'phoneInputParser': '#username',
'sendButtonParser': '#btnSendCode'},
{'name': '360doc', 'url': 'http://www.360doc.com/register.aspx',
'parser': 'selector',
'phoneInputParser': '#signMobileName',
'sendButtonParser': '#sign_sendcode'},
{'name': 'iwgame', 'url': 'http://passport.iwgame.com/reg/account/regpage.do',
'parser': 'xpath',
'phoneInputParser': '//*[@name="identityId"]',
'sendButtonParser': '//*[@id="regPersonalForm"]/ul/li[5]/div[1]/em/a'},
]
def eboo(chrome):
for item in config:
itemName = item['name']
itemUrl = item['url']
itemParser = ''
setDateTime = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time()))
try:
chrome.get(itemUrl)
if item['parser'] == 'selector':
itemParser = 'find_element_by_css_selector'
elif item['parser'] == 'xpath':
itemParser = 'find_element_by_xpath'
# chrome 对象通过 __getattribute__ 方法去执行名为 itemParser 变量值的函数
chrome.__getattribute__(itemParser)(item['phoneInputParser']).send_keys(phoneNum)
chrome.__getattribute__(itemParser)(item['sendButtonParser']).click()
except NoSuchElementException as error:
print(f"{itemName} ---> {error}")
chrome.get_screenshot_as_file('./error/' + itemName + '_' + setDateTime + '.png')
finally:
print(f"{itemName} already completed at {setDateTime}")
def ChromeOpen():
headers = 'user-agent="Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0" '
options = ChromeOptions()
options.add_argument(headers)
chrome = Chrome(options=options)
return chrome
chrome_open = ChromeOpen()
eboo(chrome_open)