initial creation

py3interm/EXAMPLES/xml_iterparse.py

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+#!/usr/bin/env python
+from lxml.etree import iterparse
+
+
+def main():
+    doc = iterparse("../BIG_DATA/pubmed19n0001.xml", tag='PubmedArticle')  # <1>
+
+    for i, (event, element) in enumerate(doc, 1):  # <2>
+        article_title = element.findtext('.//ArticleTitle')   # <3>
+        year_completed = element.findtext('.//DateCompleted/Year')  # <3>
+        month_completed = element.findtext('.//DateCompleted/Month')  # <3>
+        clear_element(element)  # <4>
+        print("{}/{} {}".format(month_completed, year_completed, article_title[:70]))
+
+    print("Total count: {}".format(i))
+
+
+def clear_element(element):
+    element.clear()  # <5>
+    while element.getprevious() is not None:  # <6>
+        del element.getparent()[0]  # <7>
+
+
+if __name__ == '__main__':
+    main()