Python xml.etree.ElementTree 模块，ElementPath() 实例源码
我们从Python开源项目中，提取了以下25个代码示例，用于说明如何使用xml.etree.ElementTree.ElementPath()。
def path_cache():
"""
Check that the path cache behaves sanely.
>>> elem = ET.XML(SAMPLE_XML)
>>> for i in range(10): ET.ElementTree(elem).find('./'+str(i))
>>> cache_len_10 = len(ET.ElementPath._cache)
>>> for i in range(10): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) == cache_len_10
True
>>> for i in range(20): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) > cache_len_10
True
>>> for i in range(600): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) < 500
True
"""
def path_cache():
"""
Check that the path cache behaves sanely.
>>> elem = ET.XML(SAMPLE_XML)
>>> for i in range(10): ET.ElementTree(elem).find('./'+str(i))
>>> cache_len_10 = len(ET.ElementPath._cache)
>>> for i in range(10): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) == cache_len_10
True
>>> for i in range(20): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) > cache_len_10
True
>>> for i in range(600): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) < 500
True
"""
def path_cache():
"""
Check that the path cache behaves sanely.
>>> elem = ET.XML(SAMPLE_XML)
>>> for i in range(10): ET.ElementTree(elem).find('./'+str(i))
>>> cache_len_10 = len(ET.ElementPath._cache)
>>> for i in range(10): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) == cache_len_10
True
>>> for i in range(20): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) > cache_len_10
True
>>> for i in range(600): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) < 500
True
"""
def path_cache():
"""
Check that the path cache behaves sanely.
>>> elem = ET.XML(SAMPLE_XML)
>>> for i in range(10): ET.ElementTree(elem).find('./'+str(i))
>>> cache_len_10 = len(ET.ElementPath._cache)
>>> for i in range(10): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) == cache_len_10
True
>>> for i in range(20): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) > cache_len_10
True
>>> for i in range(600): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) < 500
True
"""
def path_cache():
"""
Check that the path cache behaves sanely.
>>> elem = ET.XML(SAMPLE_XML)
>>> for i in range(10): ET.ElementTree(elem).find('./'+str(i))
>>> cache_len_10 = len(ET.ElementPath._cache)
>>> for i in range(10): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) == cache_len_10
True
>>> for i in range(20): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) > cache_len_10
True
>>> for i in range(600): ET.ElementTree(elem).find('./'+str(i))
>>> len(ET.ElementPath._cache) < 500
True
"""
def sanity():
"""
Import sanity.
>>> from xml.etree import ElementTree
>>> from xml.etree import ElementInclude
>>> from xml.etree import ElementPath
"""
def simplefind():
"""
Test find methods using the elementpath fallback.
>>> from xml.etree import ElementTree
>>> CurrentElementPath = ElementTree.ElementPath
>>> ElementTree.ElementPath = ElementTree._SimpleElementPath()
>>> elem = ElementTree.XML(SAMPLE_XML)
>>> elem.find("tag").tag
'tag'
>>> ElementTree.ElementTree(elem).find("tag").tag
'tag'
>>> elem.findtext("tag")
'text'
>>> elem.findtext("tog")
>>> elem.findtext("tog", "default")
'default'
>>> ElementTree.ElementTree(elem).findtext("tag")
'text'
>>> summarize_list(elem.findall("tag"))
['tag', 'tag']
>>> summarize_list(elem.findall(".//tag"))
['tag', 'tag', 'tag']
Path syntax doesn't work in this case.
>>> elem.find("section/tag")
>>> elem.findtext("section/tag")
>>> summarize_list(elem.findall("section/tag"))
[]
>>> ElementTree.ElementPath = CurrentElementPath
"""
def __enter__(self):
from xml.etree import ElementTree
self._nsmap = ElementTree._namespace_map
self._path_cache = ElementTree.ElementPath._cache
# Copy the default namespace mapping
ElementTree._namespace_map = self._nsmap.copy()
# Copy the path cache (should be empty)
ElementTree.ElementPath._cache = self._path_cache.copy()
self.checkwarnings.__enter__()
def sanity():
"""
Import sanity.
>>> from xml.etree import ElementTree
>>> from xml.etree import ElementInclude
>>> from xml.etree import ElementPath
"""
def simplefind():
"""
Test find methods using the elementpath fallback.
>>> from xml.etree import ElementTree
>>> CurrentElementPath = ElementTree.ElementPath
>>> ElementTree.ElementPath = ElementTree._SimpleElementPath()
>>> elem = ElementTree.XML(SAMPLE_XML)
>>> elem.find("tag").tag
'tag'
>>> ElementTree.ElementTree(elem).find("tag").tag
'tag'
>>> elem.findtext("tag")
'text'
>>> elem.findtext("tog")
>>> elem.findtext("tog", "default")
'default'
>>> ElementTree.ElementTree(elem).findtext("tag")
'text'
>>> summarize_list(elem.findall("tag"))
['tag', 'tag']
>>> summarize_list(elem.findall(".//tag"))
['tag', 'tag', 'tag']
Path syntax doesn't work in this case.
>>> elem.find("section/tag")
>>> elem.findtext("section/tag")
>>> summarize_list(elem.findall("section/tag"))
[]
>>> ElementTree.ElementPath = CurrentElementPath
"""
def __enter__(self):
from xml.etree import ElementTree
self._nsmap = ElementTree._namespace_map
self._path_cache = ElementTree.ElementPath._cache
# Copy the default namespace mapping
ElementTree._namespace_map = self._nsmap.copy()
# Copy the path cache (should be empty)
ElementTree.ElementPath._cache = self._path_cache.copy()
self.checkwarnings.__enter__()
def sanity():
"""
Import sanity.
>>> from xml.etree import ElementTree
>>> from xml.etree import ElementInclude
>>> from xml.etree import ElementPath
"""
def simplefind():
"""
Test find methods using the elementpath fallback.
>>> from xml.etree import ElementTree
>>> CurrentElementPath = ElementTree.ElementPath
>>> ElementTree.ElementPath = ElementTree._SimpleElementPath()
>>> elem = ElementTree.XML(SAMPLE_XML)
>>> elem.find("tag").tag
'tag'
>>> ElementTree.ElementTree(elem).find("tag").tag
'tag'
>>> elem.findtext("tag")
'text'
>>> elem.findtext("tog")
>>> elem.findtext("tog", "default")
'default'
>>> ElementTree.ElementTree(elem).findtext("tag")
'text'
>>> summarize_list(elem.findall("tag"))
['tag', 'tag']
>>> summarize_list(elem.findall(".//tag"))
['tag', 'tag', 'tag']
Path syntax doesn't work in this case.
>>> elem.find("section/tag")
>>> elem.findtext("section/tag")
>>> summarize_list(elem.findall("section/tag"))
[]
>>> ElementTree.ElementPath = CurrentElementPath
"""
def __enter__(self):
from xml.etree import ElementTree
self._nsmap = ElementTree._namespace_map
self._path_cache = ElementTree.ElementPath._cache
# Copy the default namespace mapping
ElementTree._namespace_map = self._nsmap.copy()
# Copy the path cache (should be empty)
ElementTree.ElementPath._cache = self._path_cache.copy()
self.checkwarnings.__enter__()
def sanity():
"""
Import sanity.
>>> from xml.etree import ElementTree
>>> from xml.etree import ElementInclude
>>> from xml.etree import ElementPath
"""
def simplefind():
"""
Test find methods using the elementpath fallback.
>>> from xml.etree import ElementTree
>>> CurrentElementPath = ElementTree.ElementPath
>>> ElementTree.ElementPath = ElementTree._SimpleElementPath()
>>> elem = ElementTree.XML(SAMPLE_XML)
>>> elem.find("tag").tag
'tag'
>>> ElementTree.ElementTree(elem).find("tag").tag
'tag'
>>> elem.findtext("tag")
'text'
>>> elem.findtext("tog")
>>> elem.findtext("tog", "default")
'default'
>>> ElementTree.ElementTree(elem).findtext("tag")
'text'
>>> summarize_list(elem.findall("tag"))
['tag', 'tag']
>>> summarize_list(elem.findall(".//tag"))
['tag', 'tag', 'tag']
Path syntax doesn't work in this case.
>>> elem.find("section/tag")
>>> elem.findtext("section/tag")
>>> summarize_list(elem.findall("section/tag"))
[]
>>> ElementTree.ElementPath = CurrentElementPath
"""
def __enter__(self):
from xml.etree import ElementTree
self._nsmap = ElementTree._namespace_map
self._path_cache = ElementTree.ElementPath._cache
# Copy the default namespace mapping
ElementTree._namespace_map = self._nsmap.copy()
# Copy the path cache (should be empty)
ElementTree.ElementPath._cache = self._path_cache.copy()
self.checkwarnings.__enter__()
def sanity():
"""
Import sanity.
>>> from xml.etree import ElementTree
>>> from xml.etree import ElementInclude
>>> from xml.etree import ElementPath
"""
def simplefind():
"""
Test find methods using the elementpath fallback.
>>> from xml.etree import ElementTree
>>> CurrentElementPath = ElementTree.ElementPath
>>> ElementTree.ElementPath = ElementTree._SimpleElementPath()
>>> elem = ElementTree.XML(SAMPLE_XML)
>>> elem.find("tag").tag
'tag'
>>> ElementTree.ElementTree(elem).find("tag").tag
'tag'
>>> elem.findtext("tag")
'text'
>>> elem.findtext("tog")
>>> elem.findtext("tog", "default")
'default'
>>> ElementTree.ElementTree(elem).findtext("tag")
'text'
>>> summarize_list(elem.findall("tag"))
['tag', 'tag']
>>> summarize_list(elem.findall(".//tag"))
['tag', 'tag', 'tag']
Path syntax doesn't work in this case.
>>> elem.find("section/tag")
>>> elem.findtext("section/tag")
>>> summarize_list(elem.findall("section/tag"))
[]
>>> ElementTree.ElementPath = CurrentElementPath
"""
def __enter__(self):
from xml.etree import ElementTree
self._nsmap = ElementTree._namespace_map
self._path_cache = ElementTree.ElementPath._cache
# Copy the default namespace mapping
ElementTree._namespace_map = self._nsmap.copy()
# Copy the path cache (should be empty)
ElementTree.ElementPath._cache = self._path_cache.copy()
self.checkwarnings.__enter__()
def xpath_tokenizer(p):
"""
Test the XPath tokenizer.
>>> # tests from the xml specification
>>> xpath_tokenizer("*")
['*']
>>> xpath_tokenizer("text()")
['text', '()']
>>> xpath_tokenizer("@name")
['@', 'name']
>>> xpath_tokenizer("@*")
['@', '*']
>>> xpath_tokenizer("para[1]")
['para', '[', '1', ']']
>>> xpath_tokenizer("para[last()]")
['para', '[', 'last', '()', ']']
>>> xpath_tokenizer("*/para")
['*', '/', 'para']
>>> xpath_tokenizer("/doc/chapter[5]/section[2]")
['/', 'doc', '/', 'chapter', '[', '5', ']', '/', 'section', '[', '2', ']']
>>> xpath_tokenizer("chapter//para")
['chapter', '//', 'para']
>>> xpath_tokenizer("//para")
['//', 'para']
>>> xpath_tokenizer("//olist/item")
['//', 'olist', '/', 'item']
>>> xpath_tokenizer(".")
['.']
>>> xpath_tokenizer(".//para")
['.', '//', 'para']
>>> xpath_tokenizer("..")
['..']
>>> xpath_tokenizer("../@lang")
['..', '/', '@', 'lang']
>>> xpath_tokenizer("chapter[title]")
['chapter', '[', 'title', ']']
>>> xpath_tokenizer("employee[@secretary and @assistant]")
['employee', '[', '@', 'secretary', '', 'and', '', '@', 'assistant', ']']
>>> # additional tests
>>> xpath_tokenizer("{http://spam}egg")
['{http://spam}egg']
>>> xpath_tokenizer("./spam.egg")
['.', '/', 'spam.egg']
>>> xpath_tokenizer(".//{http://spam}egg")
['.', '//', '{http://spam}egg']
"""
from xml.etree import ElementPath
out = []
for op, tag in ElementPath.xpath_tokenizer(p):
out.append(op or tag)
return out
def xpath_tokenizer(p):
"""
Test the XPath tokenizer.
>>> # tests from the xml specification
>>> xpath_tokenizer("*")
['*']
>>> xpath_tokenizer("text()")
['text', '()']
>>> xpath_tokenizer("@name")
['@', 'name']
>>> xpath_tokenizer("@*")
['@', '*']
>>> xpath_tokenizer("para[1]")
['para', '[', '1', ']']
>>> xpath_tokenizer("para[last()]")
['para', '[', 'last', '()', ']']
>>> xpath_tokenizer("*/para")
['*', '/', 'para']
>>> xpath_tokenizer("/doc/chapter[5]/section[2]")
['/', 'doc', '/', 'chapter', '[', '5', ']', '/', 'section', '[', '2', ']']
>>> xpath_tokenizer("chapter//para")
['chapter', '//', 'para']
>>> xpath_tokenizer("//para")
['//', 'para']
>>> xpath_tokenizer("//olist/item")
['//', 'olist', '/', 'item']
>>> xpath_tokenizer(".")
['.']
>>> xpath_tokenizer(".//para")
['.', '//', 'para']
>>> xpath_tokenizer("..")
['..']
>>> xpath_tokenizer("../@lang")
['..', '/', '@', 'lang']
>>> xpath_tokenizer("chapter[title]")
['chapter', '[', 'title', ']']
>>> xpath_tokenizer("employee[@secretary and @assistant]")
['employee', '[', '@', 'secretary', '', 'and', '', '@', 'assistant', ']']
>>> # additional tests
>>> xpath_tokenizer("{http://spam}egg")
['{http://spam}egg']
>>> xpath_tokenizer("./spam.egg")
['.', '/', 'spam.egg']
>>> xpath_tokenizer(".//{http://spam}egg")
['.', '//', '{http://spam}egg']
"""
from xml.etree import ElementPath
out = []
for op, tag in ElementPath.xpath_tokenizer(p):
out.append(op or tag)
return out
def xpath_tokenizer(p):
"""
Test the XPath tokenizer.
>>> # tests from the xml specification
>>> xpath_tokenizer("*")
['*']
>>> xpath_tokenizer("text()")
['text', '()']
>>> xpath_tokenizer("@name")
['@', 'name']
>>> xpath_tokenizer("@*")
['@', '*']
>>> xpath_tokenizer("para[1]")
['para', '[', '1', ']']
>>> xpath_tokenizer("para[last()]")
['para', '[', 'last', '()', ']']
>>> xpath_tokenizer("*/para")
['*', '/', 'para']
>>> xpath_tokenizer("/doc/chapter[5]/section[2]")
['/', 'doc', '/', 'chapter', '[', '5', ']', '/', 'section', '[', '2', ']']
>>> xpath_tokenizer("chapter//para")
['chapter', '//', 'para']
>>> xpath_tokenizer("//para")
['//', 'para']
>>> xpath_tokenizer("//olist/item")
['//', 'olist', '/', 'item']
>>> xpath_tokenizer(".")
['.']
>>> xpath_tokenizer(".//para")
['.', '//', 'para']
>>> xpath_tokenizer("..")
['..']
>>> xpath_tokenizer("../@lang")
['..', '/', '@', 'lang']
>>> xpath_tokenizer("chapter[title]")
['chapter', '[', 'title', ']']
>>> xpath_tokenizer("employee[@secretary and @assistant]")
['employee', '[', '@', 'secretary', '', 'and', '', '@', 'assistant', ']']
>>> # additional tests
>>> xpath_tokenizer("{http://spam}egg")
['{http://spam}egg']
>>> xpath_tokenizer("./spam.egg")
['.', '/', 'spam.egg']
>>> xpath_tokenizer(".//{http://spam}egg")
['.', '//', '{http://spam}egg']
"""
from xml.etree import ElementPath
out = []
for op, tag in ElementPath.xpath_tokenizer(p):
out.append(op or tag)
return out
def xpath_tokenizer(p):
"""
Test the XPath tokenizer.
>>> # tests from the xml specification
>>> xpath_tokenizer("*")
['*']
>>> xpath_tokenizer("text()")
['text', '()']
>>> xpath_tokenizer("@name")
['@', 'name']
>>> xpath_tokenizer("@*")
['@', '*']
>>> xpath_tokenizer("para[1]")
['para', '[', '1', ']']
>>> xpath_tokenizer("para[last()]")
['para', '[', 'last', '()', ']']
>>> xpath_tokenizer("*/para")
['*', '/', 'para']
>>> xpath_tokenizer("/doc/chapter[5]/section[2]")
['/', 'doc', '/', 'chapter', '[', '5', ']', '/', 'section', '[', '2', ']']
>>> xpath_tokenizer("chapter//para")
['chapter', '//', 'para']
>>> xpath_tokenizer("//para")
['//', 'para']
>>> xpath_tokenizer("//olist/item")
['//', 'olist', '/', 'item']
>>> xpath_tokenizer(".")
['.']
>>> xpath_tokenizer(".//para")
['.', '//', 'para']
>>> xpath_tokenizer("..")
['..']
>>> xpath_tokenizer("../@lang")
['..', '/', '@', 'lang']
>>> xpath_tokenizer("chapter[title]")
['chapter', '[', 'title', ']']
>>> xpath_tokenizer("employee[@secretary and @assistant]")
['employee', '[', '@', 'secretary', '', 'and', '', '@', 'assistant', ']']
>>> # additional tests
>>> xpath_tokenizer("{http://spam}egg")
['{http://spam}egg']
>>> xpath_tokenizer("./spam.egg")
['.', '/', 'spam.egg']
>>> xpath_tokenizer(".//{http://spam}egg")
['.', '//', '{http://spam}egg']
"""
from xml.etree import ElementPath
out = []
for op, tag in ElementPath.xpath_tokenizer(p):
out.append(op or tag)
return out
def xpath_tokenizer(p):
"""
Test the XPath tokenizer.
>>> # tests from the xml specification
>>> xpath_tokenizer("*")
['*']
>>> xpath_tokenizer("text()")
['text', '()']
>>> xpath_tokenizer("@name")
['@', 'name']
>>> xpath_tokenizer("@*")
['@', '*']
>>> xpath_tokenizer("para[1]")
['para', '[', '1', ']']
>>> xpath_tokenizer("para[last()]")
['para', '[', 'last', '()', ']']
>>> xpath_tokenizer("*/para")
['*', '/', 'para']
>>> xpath_tokenizer("/doc/chapter[5]/section[2]")
['/', 'doc', '/', 'chapter', '[', '5', ']', '/', 'section', '[', '2', ']']
>>> xpath_tokenizer("chapter//para")
['chapter', '//', 'para']
>>> xpath_tokenizer("//para")
['//', 'para']
>>> xpath_tokenizer("//olist/item")
['//', 'olist', '/', 'item']
>>> xpath_tokenizer(".")
['.']
>>> xpath_tokenizer(".//para")
['.', '//', 'para']
>>> xpath_tokenizer("..")
['..']
>>> xpath_tokenizer("../@lang")
['..', '/', '@', 'lang']
>>> xpath_tokenizer("chapter[title]")
['chapter', '[', 'title', ']']
>>> xpath_tokenizer("employee[@secretary and @assistant]")
['employee', '[', '@', 'secretary', '', 'and', '', '@', 'assistant', ']']
>>> # additional tests
>>> xpath_tokenizer("{http://spam}egg")
['{http://spam}egg']
>>> xpath_tokenizer("./spam.egg")
['.', '/', 'spam.egg']
>>> xpath_tokenizer(".//{http://spam}egg")
['.', '//', '{http://spam}egg']
"""
from xml.etree import ElementPath
out = []
for op, tag in ElementPath.xpath_tokenizer(p):
out.append(op or tag)
return out