pythonのparseエラー

encoding = "utf-8"
infile_xml= open(base_path + gov + '/Annotations/' +file)
root = ElementTree.parse(f)

cls_names = []
total_images = 0
for gov in govs:
    
    file_list = os.listdir(base_path + gov + '/Annotations/')

    for file in file_list:

        total_images = total_images + 1
        if file =='.DS_Store':
            pass
        else:
            infile_xml = open(base_path + gov + '/Annotations/' +file)
            tree = ElementTree.parse(infile_xml)
            root = tree.getroot()
            for obj in root.iter('object'):
                cls_name = obj.find('name').text
                cls_names.append(cls_name)
print("total")
print("# of images：" + str(total_images))
print("# of labels：" + str(len(cls_names)))

```Traceback (most recent call last):

  File "/anaconda3/envs/TensorFlow2/lib/python3.6/site-packages/IPython/core/interactiveshell.py", line 2963, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)

  File "<ipython-input-19-13a3872d49bb>", line 3, in <module>
    root = ElementTree.parse(f)

  File "/anaconda3/envs/TensorFlow2/lib/python3.6/xml/etree/ElementTree.py", line 1196, in parse
    tree.parse(source, parser)

  File "/anaconda3/envs/TensorFlow2/lib/python3.6/xml/etree/ElementTree.py", line 597, in parse
    self._root = parser._parse_whole(source)

  File "<string>", line unknown
ParseError: no element found: line 1, column 0

上記のコードを打ち込むと
no element found: line 1, column 0
とエラーが出てしまいます

環境としてはmacOS　High Sierra バージョン10.13.5です
上記のエラーが出てしまうのですが、どのようにすれば改善できるのでしょうか？
よろしくお願いします。


・環境構築に関しては、ネットからanacondaをインストールしました。
今回githubで参考にしているのですがその途中でエラーが出てしまいました。
参考URLはこちらになります
https://github.com/sekilab/RoadDamageDetector/blob/master/RoadDamageDatasetTutorial.ipynb

念のため、前の段階の作業コードを載せておきます

```ここに言語を入力
import six.moves.urllib as urllib

>>> import os
>>> os.getcwd()

try:
    import urllib.request
except ImportError:
    raise ImportError('You should use Python 3.x')

if not os.path.exists('./RoadDamageDataset.tar.gz'):
    url_base = 'https://s3-ap-northeast-1.amazonaws.com/mycityreport/RoadDamageDataset.tar.gz'
    urllib.request.urlretrieve(url_base, './RoadDamageDataset.tar.gz')
    
    print("Download RoadDamageDataset.tar.gz Done")
    
else:
    print("You have RoadDamageDataset.tar.gz")

if not os.path.exists('./trainedModels.tar.gz'):
    url_base = 'https://s3-ap-northeast-1.amazonaws.com/mycityreport/trainedModels.tar.gz'
    urllib.request.urlretrieve(url_base, './trainedModels.tar.gz')
    
    print("Download trainedModels.tar.gz Done")
    
else:
    print("You have trainedModels.tar.gz")

!tar -zxf ./RoadDamageDataset.tar.gz
!tar -zxf ./trainedModels.tar.gz

from xml.etree import ElementTree
from xml.dom import minidom
import collections

import os

import matplotlib.pyplot as plt
import matplotlib as matplot
import seaborn as sns
%matplotlib inline

base_path = os.getcwd() + '/RoadDamageDataset/'

damageTypes=["D00", "D01", "D10", "D11", "D20", "D40", "D43", "D44"]

# govs corresponds to municipality name.
govs = ["Adachi", "Chiba", "Ichihara", "Muroran", "Nagakute", "Numazu", "Sumida"]

encoding = "utf-8"
infile_xml= open(base_path + gov + '/Annotations/' +file)
root = ElementTree.parse(f)

cls_names = []
total_images = 0
for gov in govs:
    
    file_list = os.listdir(base_path + gov + '/Annotations/')

    for file in file_list:

        total_images = total_images + 1
        if file =='.DS_Store':
            pass
        else:
            infile_xml = open(base_path + gov + '/Annotations/' +file)
            tree = ElementTree.parse(infile_xml)
            root = tree.getroot()
            for obj in root.iter('object'):
                cls_name = obj.find('name').text
                cls_names.append(cls_name)
print("total")
print("# of images：" + str(total_images))
print("# of labels：" + str(len(cls_names)))

Traceback (most recent call last):

File "/anaconda3/envs/TensorFlow2/lib/python3.6/site-packages/IPython/core/interactiveshell.py", line 2963, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)

File "<ipython-input-19-13a3872d49bb>", line 3, in <module>
root = ElementTree.parse(f)

File "/anaconda3/envs/TensorFlow2/lib/python3.6/xml/etree/ElementTree.py", line 1196, in parse
tree.parse(source, parser)

File "/anaconda3/envs/TensorFlow2/lib/python3.6/xml/etree/ElementTree.py", line 597, in parse
self._root = parser._parse_whole(source)

File "<string>", line unknown
ParseError: no element found: line 1, column 0