我试图纠正以下错误，主要是关于'username'和'directory'的参数。我尝试了所有可能的方法，但没有运气。 Python没有说明以下错误引用的代码行：
usage: Google_Map.py [-h] [-n NUM_TO_DOWNLOAD] [-l LOG_LEVEL]
username directory
Google_Map.py: error: the following arguments are required: username, directory
请参阅此处的代码：
def __init__(self, username, directory, num_to_download = 10,
log_level='info'):
self.username = username
self.profile_url = self.get_url(username)
self.directory = directory
self.PAUSE = 1
self.user_agent = 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'
self.headers = {'User-Agent': self.user_agent}
self.html_source = None
self.log_level = getattr(logging, log_level.upper())
self.setup_logging(self.log_level)
self.set_num_posts(num_to_download)
self.setup_webdriver()
def get_url(self, path):
return urlparse.urljoin('https://instagram.com', path)
def set_num_posts(self, num_to_download=None):
self.num_posts = int(self.get_posts_count(self.profile_url) or 0)
self.num_to_download = num_to_download
def setup_logging(self, level=logging.INFO):
self.logger = logging.getLogger('instaraider')
self.logger.addHandler(logging.StreamHandler())
self.logger.setLevel(logging.INFO)
def log(self, *strings, **kwargs):
level = kwargs.pop('level', logging.INFO)
self.logger.log(level, u' '.join(str(s) for s in strings))
def setup_webdriver(self):
self.profile = webdriver.FirefoxProfile()
self.profile.set_preference("general.useragent.override", self.user_agent)
self.webdriver = webdriver.Firefox(self.profile)
self.webdriver.set_window_size(480, 320)
self.webdriver.set_window_position(800, 0)
def get_posts_count(self, url):
"""
Given a url to Instagram profile, return number of photos posted
"""
response = requests.get(url)
counts_code = re.search(r'\"media":{"count":\d+', response.text)
if not counts_code:
return None
return re.findall(r'\d+', counts_code.group())[0]
def log_in_user(self):
driver = self.webdriver
self.log('You need to login to access this profile.',
'Redirecting you to the login page in the browser.',
level=logging.WARN)
driver.get(self.get_url('accounts/login/'))
# Wait until user has been successfully logged in and redirceted
# to his/her feed.
WebDriverWait(driver, 60).until(
expected_conditions.presence_of_element_located(
(By.CSS_SELECTOR, '.-cx-PRIVATE-FeedPage__feed'),
)
)
self.log('User successfully logged in.', level=logging.INFO)
self.set_num_posts() # Have to set this again
driver.get(self.profile_url)
def load_instagram(self):
"""
Using Selenium WebDriver, load Instagram page to get page source
"""
self.log(self.username, 'has', self.num_posts, 'posts on Instagram.')
if self.num_to_download is not None:
self.log("The first", self.num_to_download, "of them will be downloaded.")
num_to_download = self.num_to_download or self.num_posts
driver = self.webdriver
# load Instagram profile and wait for PAUSE
self.log("Loading Instagram profile...")
driver.get(self.profile_url)
driver.implicitly_wait(self.PAUSE)
driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
try:
el = driver.find_element_by_css_selector(
'.-cx-PRIVATE-ProfilePage__advisoryMessageHeader'
)
except NoSuchElementException:
pass
else:
self.log_in_user()
if (num_to_download > 24):
scroll_to_bottom = self.get_scroll_count(num_to_download)
element = driver.find_element_by_css_selector('div.-cx-PRIVATE-AutoloadingPostsGrid__moreLoadingIndicator a')
driver.implicitly_wait(self.PAUSE)
element.click()
for y in range(int(scroll_to_bottom)):
self.scroll_page(driver)
# After load all profile photos, retur, source to download_photos()
time.sleep(1)
source = driver.page_source
# close Firefox window
driver.close()
return source
def scroll_page(self, driver):
driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
time.sleep(0.2)
driver.execute_script("window.scrollTo(0, 0);")
def get_scroll_count(self, count):
return (int(count) - 24) / 12 + 1
def validate(self):
"""
returns True if Instagram username is valid
"""
req = requests.get(self.profile_url)
try:
req.raise_for_status()
except:
self.log('User', self.username, 'is not valid.',
level=logging.ERROR)
return False
if not self.num_posts:
self.log('User', self.username, 'has no photos to download.',
level=logging.ERROR)
return False
return True
def save_photo(self, photo_url, photo_name):
image_request = requests.get(photo_url, headers=self.headers)
image_data = image_request.content
with open(photo_name, 'wb') as fp:
fp.write(image_data)
if "last-modified" in image_request.headers:
modtime = calendar.timegm(eut.parsedate(image_request.headers["last-modified"]))
os.utime(photo_name, (modtime, modtime))
def download_photos(self):
"""
Given source code for loaded Instagram page,
extract all hrefs and download full-resolution photos
source: HTML source code of Instagram profile papge
"""
num_to_download = self.num_to_download or self.num_posts
if self.html_source is None:
self.html_source = self.load_instagram()
# check if directory exists, if not, make it
if not op.exists(self.directory):
os.makedirs(self.directory)
# index for progress bar
photos_saved = 0
self.log("Saving photos to", self.directory)
links = re.findall(r'src="[https]+:...[\/\w \.-]*..[\/\w \.-]*..[\/\w \.-]*..[\/\w \.-].jpg', self.html_source)
for link in links:
photo_url = link[5:]
photo_url = photo_url.replace('\\', '')
photo_url = re.sub(r'/s\d+x\d+/', '/', photo_url)
split = urlparse.urlsplit(photo_url)
photo_name = op.join(self.directory, split.path.split("/")[-1])
# save full-resolution photo if its new
if not op.isfile(photo_name):
self.save_photo(photo_url, photo_name)
photos_saved += 1
self.log('Downloaded file {}/{} ({}).'.format(
photos_saved, num_to_download, op.basename(photo_name)))
else:
self.log('Skipping file', photo_name, 'as it already exists.')
if photos_saved >= num_to_download:
break
self.log('Saved', photos_saved, 'files to', self.directory)
def main():
# parse arguments
parser = argparse.ArgumentParser(description='InstaRaider')
parser.add_argument('username', help='Instagram username')
parser.add_argument('directory', help='Where to save the images')
parser.add_argument('-n', '--num-to-download',
help='Number of posts to download', type=int)
parser.add_argument('-l', '--log-level', help="Log level", default='info')
args = parser.parse_args()
username = args.username
directory = op.expanduser(args.directory)
raider = InstaRaider(username, directory,
num_to_download=args.num_to_download,
log_level=args.log_level)
if not raider.validate():
return
raider.download_photos()
if __name__ == '__main__':
main()
答案 0 :(得分：2)
这不是Python异常消息。该命令行有助于输出。
输出由argparse模块生成，在此配置：
def main():
# parse arguments
parser = argparse.ArgumentParser(description='InstaRaider')
parser.add_argument('username', help='Instagram username')
parser.add_argument('directory', help='Where to save the images')
parser.add_argument('-n', '--num-to-download',
help='Number of posts to download', type=int)
parser.add_argument('-l', '--log-level', help="Log level", default='info')
args = parser.parse_args()
调用parser.parse_args()时，您的命令行参数将被解析以匹配上述配置。
具体来说，username和directory位置参数必需：
parser.add_argument('username', help='Instagram username')
parser.add_argument('directory', help='Where to save the images')
运行脚本时，您需要在命令行中指定这些：
Google_Map.py some_instagram_username /path/to/directory/to/save/images
其他命令行选项是可选，以-或--开头。
如果您无法从控制台或终端命令行运行此命令，则可以直接将选项传递给解析器：
def main(argv=None):
# parse arguments
parser = argparse.ArgumentParser(description='InstaRaider')
parser.add_argument('username', help='Instagram username')
parser.add_argument('directory', help='Where to save the images')
parser.add_argument('-n', '--num-to-download',
help='Number of posts to download', type=int)
parser.add_argument('-l', '--log-level', help="Log level", default='info')
args = parser.parse_args(argv)
# ....
main(['some_instagram_username', '/path/to/directory/to/save/images'])
现在，参数通过argv可选函数参数作为列表传递。
但是，您可以直接使用main()类，而不是使用InstaRaider()解析参数：
raider = InstaRaider('some_instagram_username', '/path/to/directory/to/save/images')
raider.download_photos()