python : selenium 网页爬虫 unittest 传参数

最新推荐文章于 2025-05-29 20:10:57 发布

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本教程通过Python Selenium实现从天天基金网上自动抓取特定基金的历史净值数据，并保存到本地文件中。该程序首先打开指定基金的网页，定位到净值表格，然后逐行读取并记录数据。

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抓取天天基金网上的基金净值

fund1.py

# -*- coding: utf-8 -*-
import os, sys
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import Select
from selenium.common.exceptions import NoSuchElementException
from selenium.common.exceptions import NoAlertPresentException
import unittest, time, re

class ParametrizedTestCase(unittest.TestCase):  
    """ TestCase classes that want to be parametrized should 
        inherit from this class. 
    """  
    def __init__(self, methodName='runTest', param=None):  
        super(ParametrizedTestCase, self).__init__(methodName)  
        self.param = param  
    @staticmethod  
    def parametrize(testcase_klass, param=None):  
        """ Create a suite containing all tests taken from the given 
            subclass, passing them the parameter 'param'. 
        """  
        testloader = unittest.TestLoader()  
        testnames = testloader.getTestCaseNames(testcase_klass)  
        suite = unittest.TestSuite()  
        for name in testnames:  
            suite.addTest(testcase_klass(name, param=param))  
        return suite


class Fund(ParametrizedTestCase):
    def setUp(self):
        ch_driver = os.path.abspath(r"D:\selenium\chromedriver.exe")
        os.environ["webdriver.chrome.driver"]= ch_driver
        self.driver = webdriver.Chrome()
        self.driver.implicitly_wait(30)
        self.base_url = "http://fund.eastmoney.com"
        self.verificationErrors = []
        self.accept_next_alert = True
        print self.param
        self.fp = open(self.param+'.txt','w') 
        
       
    def test_fund(self):
        f1 = self.param
        fp = self.fp
        driver = self.driver
        driver.get(self.base_url + "/f10/jjjz_%s.html" % (f1))
        assert f1 in driver.title                
        try:
            div = driver.find_element_by_id("jztable")
            table = div.find_elements_by_tag_name("table")
            tbody = table[0].find_elements_by_tag_name("tbody")
            t_rows = tbody[0].find_elements_by_tag_name('tr')
            for row in t_rows:
                fp.write(f1+' ')
                tds = row.find_elements_by_tag_name('td')
                for td in tds[0:4]:
                    fp.write(td.text +' ')
                fp.write('\n')
        except Exception as msg:
            print msg
        #

    def is_element_present(self, how, what):
        try: self.driver.find_element(by=how, value=what)
        except NoSuchElementException as e: return False
        return True
    
    def is_alert_present(self):
        try: self.driver.switch_to_alert()
        except NoAlertPresentException as e: return False
        return True
    
    def close_alert_and_get_its_text(self):
        try:
            alert = self.driver.switch_to_alert()
            alert_text = alert.text
            if self.accept_next_alert:
                alert.accept()
            else:
                alert.dismiss()
            return alert_text
        finally: self.accept_next_alert = True
    
    def tearDown(self):
        self.fp.close()
        self.driver.quit()
        self.assertEqual([], self.verificationErrors)

if len(sys.argv) ==2:
    f1 = sys.argv[1]
    if len(f1) !=6:
       sys.exit(2) 
## unittest 单元测试框架 改传参数
    suite = unittest.TestSuite()
    suite.addTest(ParametrizedTestCase.parametrize(Fund, param=f1))
    unittest.TextTestRunner(verbosity=2).run(suite)
else:
    print ' usage: fund1.py fundcode '
    sys.exit(1)

例如：python fund1.py 150103