没有用python写入文件吗？

Question

Here is my code so far:

import flickrapi
import osmapi
import geopy
from geopy.geocoders import Nominatim
from time import sleep

api_key = "xxxxxxxxxxxxxxxxxxxx"
secret_api_key = "xxxxxxxx"
flickr = flickrapi.FlickrAPI(api_key, secret_api_key)

def obtainImages3():

    file = open('citylist.txt', 'r')
    file2  = open('obtainedImages.txt', 'a+')

    for line in file:

        fields = line.strip().split()
        city = fields[1]

        group_list = flickr.groups.search (api_key=api_key, text = city, per_page = 100)

        for group in group_list[0]:

            group_images = flickr.groups.pools.getPhotos (api_key=api_key, group_id = group.attrib['nsid'], has_geo = 1, extras = 'geo, tags, url_q')

            for image in group_images[0]:

                try:
                    photo_location = flickr.photos_geo_getLocation(photo_id=image.attrib['id'])
                    lat = float(photo_location[0][0].attrib['latitude'])
                    lon = float(photo_location[0][0].attrib['longitude'])

                    id = str(image.attrib['id'])
                    url = str(image.attrib['url_q'])

                    geolocator = Nominatim()
                    location = geolocator.reverse("{}, {}".format(lat, lon))
                    dict = location.raw
                    osmid = dict.get('osm_id', 'default_value_if_null_here')
                    osmtype = dict.get('osm_type', 'default_value_if_null_here')
                    osmaddress = dict.get('display_name', 'default_value_if_null_here')

                    sleep(1)

                    if(osmtype == 'node'):
                        print id
                        print url
                        print osmaddress

                        file2.write("%s" % id)
                        file2.write(' ')
                        file2.write("%s" % url)
                        file2.write(' ')
                        file2.write("%s" % lat)
                        file2.write(' ')
                        file2.write("%s" % lon)
                        file2.write(' ')
                        file2.write("%s" % osmaddress)
                        file2.write('\n')

            except Exception:
                pass

    file2.close()
    file.close()
obtainImages3()

The code is running fine without any errors and my print statements are working fine. However nothing is being written to the file. I have used the same method for writing to a file in a very similar program and it worked perfectly but here it is not working. Can anyone suggest why this might be? Thank you!!

Answer 1

I think the file.close() function should go into the function node, because it is in a buffer. or, remove the "except Exception:" method, and see what you got.

Answer 2

Clearly, the file write is throwing an exception. In your code, you are ignoring the exception. Change the except statement to:

except Exception as e:
    print e

and you will see the error. It probably cannot open the file.

Answer 3

Adding this so I can get credit for answer that was in comment.

Try adding file2.flush() after the file2.write('\\n')