Removed defusedxml as a hard requirement

Author: mstfbl

.circleci/unittest/linux/scripts/environment.yml

@@ -18,6 +18,5 @@ dependencies:
     - sphinx
     - sphinx-rtd-theme
     - tqdm
-    - defusedxml
     - https://github.com/explosion/spacy-models/releases/download/de_core_news_sm-3.0.0/de_core_news_sm-3.0.0.tar.gz#egg=de_core_news_sm==3.0.0
     - https://github.com/explosion/spacy-models/releases/download/en_core_web_sm-3.0.0/en_core_web_sm-3.0.0.tar.gz#egg=en_core_web_sm==3.0.0

.circleci/unittest/windows/scripts/environment.yml

@@ -20,6 +20,5 @@ dependencies:
     - tqdm
     - certifi
     - future
-    - defusedxml
     - https://github.com/explosion/spacy-models/releases/download/de_core_news_sm-3.0.0/de_core_news_sm-3.0.0.tar.gz#egg=de_core_news_sm==3.0.0
     - https://github.com/explosion/spacy-models/releases/download/en_core_web_sm-3.0.0/en_core_web_sm-3.0.0.tar.gz#egg=en_core_web_sm==3.0.0

torchtext/data/datasets_utils.py

@@ -11,7 +11,10 @@
     unicode_csv_reader,
 )
 import codecs
-import defusedxml.ElementTree as ET
+try:
+    import defusedxml.ElementTree as ET
+except ImportError:
+    import xml.etree.ElementTree as ET
 """
 These functions and classes are meant solely for use in torchtext.datasets and not
 for public consumption yet.

torchtext/legacy/datasets/translation.py

@@ -1,5 +1,8 @@
 import os
-import defusedxml.ElementTree as ET
+try:
+    import defusedxml.ElementTree as ET
+except ImportError:
+    import xml.etree.ElementTree as ET
 import glob
 import io
 import codecs