day22_5-xml模块
# 参考资料:
# python模块(转自Yuan先生) - 狂奔__蜗牛 - 博客园
# https://www.cnblogs.com/guojintao/articles/9070485.html
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# ********************day22_5-xml模块 *******************
# ********************day22_5-xml模块 *******************
# =====>>>>>>内容概览
# =====>>>>>>内容概览
'''
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# # 1、xml模块 的解释
# # # xml是实现不同语言或程序之间进行数据交换的协议,跟json差不多,但json使用起来更简单,
# # # 不过,古时候,在json还没诞生的黑暗年代,大家只能选择用xml呀,至今很多传统公司如金融
# # # 行业的很多系统的接口还主要是xml。
# # # xml的格式如下,就是通过<>节点来区别数据结构的
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# # 2、对xml文件读取标签
# # # getroot获取根节点
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# # 3、对xml文件读取二级的标签、属性
# # # tag、attrib
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# # 4、对xml文件读取二级的标签、属性、内容
# # # tag、attrib、test
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# # 5、对xml文件只遍历year 节点
# # # node
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# # 6、对xml文件进行修改
# # # n
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# # 7、对xml文件进行删除
# # # findall可以找的范围比较广一点, find可以找的范围比较小一些
# # # 先findall,在find,否则会报错
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# # 8、生成xml文档对象
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# # 9、生成xml文档对象并且打印,生成格式
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''' # ------------------------------------------------------------ # # 1、xml模块 的解释 # # # xml是实现不同语言或程序之间进行数据交换的协议,跟json差不多,但json使用起来更简单, # # # 不过,古时候,在json还没诞生的黑暗年代,大家只能选择用xml呀,至今很多传统公司如金融 # # # 行业的很多系统的接口还主要是xml。 # # # xml的格式如下,就是通过<>节点来区别数据结构的 # ------------------------------------------------------------ ''' ''' # 下面实验中所用到的xml文件内容。 # 储存位置与执行文件同目录 # 名称:xml_lesson <data> <country name="Liechtenstein"> <rank updated="yes">2</rank> <year updated="yes">2010</year> <gdppc>141100</gdppc> <neighbor direction="E" name="Austria" /> <neighbor direction="W" name="Switzerland" /> </country> <country name="Singapore"> <rank updated="yes">5</rank> <year updated="yes">2013</year> <gdppc>59900</gdppc> <neighbor direction="N" name="Malaysia" /> </country> <country name="Panama"> <rank updated="yes">69</rank> <year updated="yes">2013</year> <gdppc>13600</gdppc> <neighbor direction="W" name="Costa Rica" /> <neighbor direction="E" name="Colombia" /> </country> </data> ''' ''' # ------------------------------------------------------------ # # 2、对xml文件读取标签 # # # getroot获取根节点 # ------------------------------------------------------------ ''' # # import xml.etree.ElementTree as ET # tree = ET.parse("xml_lesson") # root = tree.getroot() # print(root.tag) # # # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_5-xml.py # # data # # # # Process finished with exit code 0 ''' # ------------------------------------------------------------ # # 2、对xml文件读取一级的标签、属性 # # # tag、attrib # ------------------------------------------------------------ ''' # # import xml.etree.ElementTree as ET # tree = ET.parse("xml_lesson") # root = tree.getroot() # print(root.tag) # # for i in root: # print("标签:",i.tag) # print("属性:",i.attrib) # # # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_5-xml.py # # data # # 标签: country # # 属性: {'name': 'Liechtenstein'} # # 标签: country # # 属性: {'name': 'Singapore'} # # 标签: country # # 属性: {'name': 'Panama'} # # # # Process finished with exit code 0 ''' # ------------------------------------------------------------ # # 3、对xml文件读取二级的标签、属性 # # # tag、attrib # ------------------------------------------------------------ ''' # # import xml.etree.ElementTree as ET # tree = ET.parse("xml_lesson") # root = tree.getroot() # print(root.tag) # # for i in root: # print( ("一级标签: "+i.tag).center(60,"-")) # print( ("一级属性: "+str(i.attrib)).center(60,"-")) # for j in i: # print("二级标签:",j.tag) # print("二级属性:",j.attrib) # # # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_5-xml.py # # data # # -----------------------一级标签: country----------------------- # # --------------一级属性: {'name': 'Liechtenstein'}-------------- # # 二级标签: rank # # 二级属性: {'updated': 'yes'} # # 二级标签: year # # 二级属性: {'updated': 'yes'} # # 二级标签: gdppc # # 二级属性: {} # # 二级标签: neighbor # # 二级属性: {'direction': 'E', 'name': 'Austria'} # # 二级标签: neighbor # # 二级属性: {'direction': 'W', 'name': 'Switzerland'} # # -----------------------一级标签: country----------------------- # # ----------------一级属性: {'name': 'Singapore'}---------------- # # 二级标签: rank # # 二级属性: {'updated': 'yes'} # # 二级标签: year # # 二级属性: {'updated': 'yes'} # # 二级标签: gdppc # # 二级属性: {} # # 二级标签: neighbor # # 二级属性: {'direction': 'N', 'name': 'Malaysia'} # # -----------------------一级标签: country----------------------- # # -----------------一级属性: {'name': 'Panama'}------------------ # # 二级标签: rank # # 二级属性: {'updated': 'yes'} # # 二级标签: year # # 二级属性: {'updated': 'yes'} # # 二级标签: gdppc # # 二级属性: {} # # 二级标签: neighbor # # 二级属性: {'direction': 'W', 'name': 'Costa Rica'} # # 二级标签: neighbor # # 二级属性: {'direction': 'E', 'name': 'Colombia'} # # # # Process finished with exit code 0 ''' # ------------------------------------------------------------ # # 4、对xml文件读取二级的标签、属性、内容 # # # tag、attrib、test # ------------------------------------------------------------ ''' # # import xml.etree.ElementTree as ET # tree = ET.parse("xml_lesson") # root = tree.getroot() # print(root.tag) # # for i in root: # print( ("一级标签: "+i.tag).center(60,"-")) # print( ("一级属性: "+str(i.attrib)).center(60,"-")) # for j in i: # print("二级标签:",j.tag) # print("二级属性:",j.attrib) # print("二级内容:",j.text) # print("\n") # # # # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_5-xml.py # # data # # -----------------------一级标签: country----------------------- # # --------------一级属性: {'name': 'Liechtenstein'}-------------- # # 二级标签: rank # # 二级属性: {'updated': 'yes'} # # 二级内容: 2 # # 二级标签: year # # 二级属性: {'updated': 'yes'} # # 二级内容: 2010 # # 二级标签: gdppc # # 二级属性: {} # # 二级内容: 141100 # # 二级标签: neighbor # # 二级属性: {'direction': 'E', 'name': 'Austria'} # # 二级内容: None # # 二级标签: neighbor # # 二级属性: {'direction': 'W', 'name': 'Switzerland'} # # 二级内容: None # # # # # # -----------------------一级标签: country----------------------- # # ----------------一级属性: {'name': 'Singapore'}---------------- # # 二级标签: rank # # 二级属性: {'updated': 'yes'} # # 二级内容: 5 # # 二级标签: year # # 二级属性: {'updated': 'yes'} # # 二级内容: 2013 # # 二级标签: gdppc # # 二级属性: {} # # 二级内容: 59900 # # 二级标签: neighbor # # 二级属性: {'direction': 'N', 'name': 'Malaysia'} # # 二级内容: None # # # # # # -----------------------一级标签: country----------------------- # # -----------------一级属性: {'name': 'Panama'}------------------ # # 二级标签: rank # # 二级属性: {'updated': 'yes'} # # 二级内容: 69 # # 二级标签: year # # 二级属性: {'updated': 'yes'} # # 二级内容: 2013 # # 二级标签: gdppc # # 二级属性: {} # # 二级内容: 13600 # # 二级标签: neighbor # # 二级属性: {'direction': 'W', 'name': 'Costa Rica'} # # 二级内容: None # # 二级标签: neighbor # # 二级属性: {'direction': 'E', 'name': 'Colombia'} # # 二级内容: None # # # # # # # # Process finished with exit code 0 ''' # ------------------------------------------------------------ # # 5、对xml文件只遍历year 节点 # # # node # ------------------------------------------------------------ ''' # # import xml.etree.ElementTree as ET # tree = ET.parse("xml_lesson") # root = tree.getroot() # # for node in root.iter("year"): # print("标签:", node.tag, "内容: ",node.text) # # # # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_5-xml.py # # 标签: year 内容: 2010 # # 标签: year 内容: 2013 # # 标签: year 内容: 2013 # # # # Process finished with exit code 0 ''' # ------------------------------------------------------------ # # 6、对xml文件进行修改 # # # n # ------------------------------------------------------------ ''' # # import xml.etree.ElementTree as ET # tree = ET.parse("xml_lesson") # root = tree.getroot() # # for node in root.iter("year"): # new_year = int(node.text) + 1 # new_year = str(new_year) + "--->+1" # node.text = new_year # node.set("updated","yes") # # 写入文件,如果文件名与原文件同名, 原文件将被覆盖 # tree.write("xml_lesson-new") # # # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_5-xml.py # # # # Process finished with exit code 0 ''' # ------------------------------------------------------------ # # 7、对xml文件进行删除 # # # findall可以找的范围比较广一点, find可以找的范围比较小一些 # # # 先findall,在find,否则会报错 # ------------------------------------------------------------ ''' # # import xml.etree.ElementTree as ET # tree = ET.parse("xml_lesson") # root = tree.getroot() # # for country in root.findall("country"): # rank = int(country.find("rank").text) # if rank > 50: # root.remove(country) # # 写入文件,如果文件名与原文件同名, 原文件将被覆盖 # tree.write("xml_lesson-remove") # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_5-xml.py # # Process finished with exit code 0 ''' # ------------------------------------------------------------ # # 8、生成xml文档对象 # ------------------------------------------------------------ ''' # import xml.etree.ElementTree as ET # new_xml = ET.Element("namelist") # ''' # 生成根节点,如下: # <namelist> # # </namelist> # ''' # # name = ET.SubElement(new_xml,"name--1",attrib={"enrolled": "yes"}) # age = ET.SubElement(name, "age---1",attrib={"checked": "no"}) # sex = ET.SubElement(name, "sex---1") # sex.text = "male" # # name2 = ET.SubElement(new_xml,"name--2",attrib={"enrolled": "no"}) # age2 = ET.SubElement(name2, "age---2",attrib={"checked": "yes"}) # # 即使是写入整数,也应该写为字符串模式 # age2.text = '22' # sex = ET.SubElement(name, "sex---1") # # # 生成文档对象 # et = ET.ElementTree(new_xml) # et.write("test.xml", encoding="utf-8", xml_declaration=True) # # # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_5-xml.py # # # # Process finished with exit code 0 ''' # ------------------------------------------------------------ # # 9、生成xml文档对象并且打印,生成格式 # ------------------------------------------------------------ ''' # # import xml.etree.ElementTree as ET # new_xml = ET.Element("namelist") # ''' # 生成根节点,如下: # <namelist> # # </namelist> # ''' # # name = ET.SubElement(new_xml,"name--1",attrib={"enrolled": "yes"}) # age = ET.SubElement(name, "age---1",attrib={"checked": "no"}) # sex = ET.SubElement(name, "sex---1") # sex.text = "male" # # name2 = ET.SubElement(new_xml,"name--2",attrib={"enrolled": "no"}) # age2 = ET.SubElement(name2, "age---2",attrib={"checked": "yes"}) # # 即使是写入整数,也应该写为字符串模式 # age2.text = '22' # sex = ET.SubElement(name, "sex---1") # # # 生成文档对象 # et = ET.ElementTree(new_xml) # et.write("test.xml", encoding="utf-8", xml_declaration=True) # # 打印生成的格式 # ET.dump(new_xml) # # # D:\Anaconda3\python.exe D:/C_cache/py/day22_os_json_re_etc_MoKuai/day22_5-xml.py # # <namelist><name--1 enrolled="yes"><age---1 checked="no" /><sex---1>male</sex---1><sex---1 /></name--1><name--2 enrolled="no"><age---2 checked="yes">22</age---2></name--2></namelist> # # # # Process finished with exit code 0
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