尝试后继续在Python循环中继续执行

Question

The loop does not restart after an exception occurs in a python loop. I have tried both continue and pass . When i use continue the loop does not proceed forward it is stuck at the exception. when i use pass it captures on the the id that has the error and the the ones before that even if there is no error when i print it shows as error.

This is my code that i am using.

for i in ids:
        try:
            driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[16]/td[1]/a').click()
            driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[4]/td[3]/a').click()
                # searching for an id.
            driver.find_element_by_xpath('//*[@id="ctl00_ctl00_cphMain_cphMain_txtEmprAcctNu"]').send_keys(i)            driver.find_element_by_id('ctl00_ctl00_cphMain_cphMain_btnSearch').click()
            driver.find_element_by_xpath('//*[@id="ctl00_ctl00_cphMain_cphMain_grdAgentEmprResults"]/tbody/tr[2]/td[1]/a').click()
                #navigating to the profile
            driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[8]/td[3]/a').click()
            driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[4]/td[1]/a').click()
                #copying the and storing the date
            subdate = driver.find_element_by_id('ctl00_ctl00_cphMain_cphMain_frmViewAccountProfile_lblSubjectivityDate').text
            subjectivitydate.append(subdate)
                #exiting current details
            driver.find_element_by_id('ctl00_ctl00_cphMain_ULinkButton4').click()
            sleep(1)
        except Exception as e:
            continue

Any suggestions how do i restart the loop with the next id. The exceptions occur either above or below the search bar.

Regards, Ren.

Answer 1

Example version:

ids = [1, 2, 3, 2]
other_id = [1, 2, 3]
id_generator = (id for id in ids) # this is a generator, needs the brackets
while True:
    try:
        id = next(id_generator)
    except StopIteration:
        break
    try:
        print(other_id[id])
    except Exception as e: # this will happen when id = 3, and is not a valid index in other_id
        continue

A version for your code

id_generator = (id for id in ids) # this is a generator, needs the brackets
while True
    try:
        id = next(id_generator)
    except StopIteration:
        break
    try:
        driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[16]/td[1]/a').click()
        driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[4]/td[3]/a').click()
            # searching for an id.
        driver.find_element_by_xpath('//*[@id="ctl00_ctl00_cphMain_cphMain_txtEmprAcctNu"]').send_keys(id)
        driver.find_element_by_id('ctl00_ctl00_cphMain_cphMain_btnSearch').click()
        driver.find_element_by_xpath('//*[@id="ctl00_ctl00_cphMain_cphMain_grdAgentEmprResults"]/tbody/tr[2]/td[1]/a').click()
            #navigating to the profile
        driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[8]/td[3]/a').click()
        driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[4]/td[1]/a').click()
            #copying the and storing the date
        subdate = driver.find_element_by_id('ctl00_ctl00_cphMain_cphMain_frmViewAccountProfile_lblSubjectivityDate').text
        subjectivitydate.append(subdate)
            #exiting current details
        driver.find_element_by_id('ctl00_ctl00_cphMain_ULinkButton4').click()
        sleep(1)
    except Exception as e:
        continue

Answer 2

Thanks @Jinglesting. I solved it by breaking the code into sub parts by using if and then in except i redirected it to the home page.

for i in ids:
        driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[16]/td[1]/a').click()
        driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[4]/td[3]/a').click()
            ​-    # searching for an id.
        driver.find_element_by_xpath('//*[@id="ctl00_ctl00_cphMain_cphMain_txtEmprAcctNu"]').send_keys(i)

        driver.find_element_by_id('ctl00_ctl00_cphMain_cphMain_btnSearch').click()
        try:
            if driver.find_element_by_xpath('//*[@id="ctl00_ctl00_cphMain_cphMain_grdAgentEmprResults"])./tbody/tr[2]/td[1]/a')!=0:
                click()
                driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[8]/td[3]/a').click()
                driver.find_element_by_xpath('//*[@id="print_area"]/table/tbody/tr[4]/td[1]/a').click()
                subdate = driver.find_element_by_id('ctl00_ctl00_cphMain_cphMain_frmViewAccountProfile_lblSubjectivityDate').text
                subjectivitydate.append(subdate)
                driver.find_element_by_id('ctl00_ctl00_cphMain_ULinkButton4').click()
        except NoSuchElementException as e:
            driver.find_element_by_xpath('//*[@id="leftNavColumn"]//*[text()="Home"]').click()
            continue

Thanks for all the help i learned something new about generators.