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Python实现将SQLite中的数据直接输出为CVS的方法示例

更新时间:2020-05-04 18:48:01 作者:startmvc
本文实例讲述了Python实现将SQLite中的数据直接输出为CVS的方法。分享给大家供大家参考,具

本文实例讲述了Python实现将SQLite中的数据直接输出为CVS的方法。分享给大家供大家参考,具体如下:

对于SQLite来说,目前查看还是比较麻烦,所以就像把SQLite中的数据直接转成Excel中能查看的数据,这样也好在Excel中做进一步分数据处理或分析,如前面文章中介绍的《使用Python程序抓取新浪在国内的所有IP》。从网上找到了一个将SQLite转成CVS的方法,贴在这里,供需要的朋友使用:


import sqlite3
import csv, codecs, cStringIO
class UnicodeWriter:
 """
 A CSV writer which will write rows to CSV file "f",
 which is encoded in the given encoding.
 """
 def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
 # Redirect output to a queue
 self.queue = cStringIO.StringIO()
 self.writer = csv.writer(self.queue, dialect=dialect, **kwds)
 self.stream = f
 self.encoder = codecs.getincrementalencoder(encoding)()
 def writerow(self, row):
 self.writer.writerow([unicode(s).encode("utf-8") for s in row])
 # Fetch UTF-8 output from the queue ...
 data = self.queue.getvalue()
 data = data.decode("utf-8")
 # ... and reencode it into the target encoding
 data = self.encoder.encode(data)
 # write to the target stream
 self.stream.write(data)
 # empty queue
 self.queue.truncate(0)
 def writerows(self, rows):
 for row in rows:
 self.writerow(row)
conn = sqlite3.connect('ipaddress.sqlite3.db')
c = conn.cursor()
c.execute('select * from ipdata')
writer = UnicodeWriter(open("export_data.csv", "wb"))
writer.writerows(c)

Python SQLite 数据 输出 CVS