我目前使用Vim来阅读SO's data dump。但是,当我向下滚动几行时,我的Macbook速度变慢了。这表明我必须有更有效的方法来读取数据。
我对MySQL知之甚少。文件位于.xml -format中。目前在.xml中读取数据相当困难。将xml文件转换为MySQL然后读取文件可能更有效。我只知道MS db -tool用于此类操作。但是,我也想知道另一种工具。
问题
您如何有效地阅读SO的数据转储?
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[编辑]
答案 0 :(得分:2)
我制作了我的第一个python程序来读取它们并输出用于mysql的SQL插入语句(它很难看但很有效)。您需要先手动创建表。
import xml.sax.handler
import xml.sax
import sys
class SOHandler(xml.sax.handler.ContentHandler):
def __init__(self):
self.errParse = 0
def startElement(self, name, attributes):
if name != "row":
self.table = name;
self.outFile = open(name+".sql","w")
self.errfile = open(name+".err","w")
else:
skip = 0
currentRow = u"insert into "+self.table+"("
for attr in attributes.keys():
currentRow += str(attr) + ","
currentRow = currentRow[:-1]
currentRow += u") values ("
for attr in attributes.keys():
try:
currentRow += u'"{0}",'.format(attributes[attr].replace('\\','\\\\').replace('"', '\\"').replace("'", "\\'"))
except UnicodeEncodeError:
self.errParse += 1;
skip = 1;
self.errfile.write(currentRow)
if skip != 1:
currentRow = currentRow[:-1]
currentRow += u");"
#print len(attributes.keys())
self.outFile.write(currentRow.encode("utf-8"))
self.outFile.write("\n")
self.outFile.flush()
print currentRow.encode("utf-8");
def characters(self, data):
pass
def endElement(self, name):
pass
if len(sys.argv) < 2:
print "Give me an xml file argument!"
sys.exit(1)
parser = xml.sax.make_parser()
handler = SOHandler()
parser.setContentHandler(handler)
parser.parse(sys.argv[1])
print handler.errParse