中断外循环错误 [英] break outside loop error

问题描述

我是 python 新手，我收到一个错误说明

I'm new to python and I am receiving an error stating

打破外循环

我知道 break 只能在 lopp 中使用，但实际上我不知道它何时确定循环何时结束.

I know a break can only be used within a lopp but I actually have no idea when it determines when a loop finishes.

如何通过将中断放置在正确的位置来解决此错误(如果这是导致问题的原因)?

How can I solve this error by placing the break in the correct place (if that is what is causing the issue)?

代码:

# see if we have an available date in this month
try:
    next_available_date = current_date.find_element_by_xpath("following::td[@data-handler='selectDay' and ancestor::div/@id='departureDateContainer']")
    print("Found an available date: {day} {month} {year}".format(day=next_available_date.text, month=month, year=year))
    next_available_date.click()
except NoSuchElementException:
# looping over until the next available date found
        while True:
# click next, if not found, select the next year
            try:
                calendar.find_element_by_class_name("ui-datepicker-next").click()
            except NoSuchElementException:
# select next year
                year = Select(calendar.find_element_by_class_name("ui-datepicker-year"))
                year.select_by_visible_text(str(int(year.first_selected_option.text) + 1))

# reporting current processed month and year
                month = Select(calendar.find_element_by_class_name("ui-datepicker-month")).first_selected_option.text
                year = Select(calendar.find_element_by_class_name("ui-datepicker-year")).first_selected_option.text
                print("Processing {month} {year}".format(month=month, year=year))

try:
    next_available_date = calendar.find_element_by_xpath(".//td[@data-handler='selectDay']")
    print("Found an available date: {day} {month} {year}".format(day=next_available_date.text, month=month, year=year))
    next_available_date.click()
    break
except NoSuchElementException:
    continue

推荐答案

break 在 python 中用于循环内.定位循环应该很容易，因为 python 代码需要正确缩进.代码中的 break 在循环之外，它在 try 块中.继续的情况类似.

break in python is used inside a loop. It should be easy to locate the loop as python code need to properly indented. break in your code is outside of loop, it is in a try block. Similar is the case for continue.

我不确定逻辑，但这可以通过在 while 循环中引入/缩进以下 try 块来解决

I am not sure of the logic but this can be fixed by bringing/indenting the following try block inside the while loop

try:
    next_available_date = calendar.find_element_by_xpath(".//td[@data-handler='selectDay']")
    print("Found an available date: {day} {month} {year}".format(day=next_available_date.text, month=month, year=year))
    next_available_date.click()
    break  #this break is in the try block
except NoSuchElementException:
    continue

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