Question

我正在尝试分析sqlite3文件并将结果打印到文本文件。如果我用打印测试代码，一切正常。当我将其写入文件时，每次都会在同一点剪切。

import sqlite3
import datetime
import time


conn = sqlite3.connect("History.sqlite")
curs = conn.cursor()
results = curs.execute("SELECT visits.id, visits.visit_time, urls.url, urls.visit_count \
                                        FROM visits INNER JOIN urls ON urls.id = visits.url \
                                        ORDER BY visits.id;")
exportfile = open('chrome_report.txt', 'w')


for row in results:
    timestamp = row[1]
    epoch_start = datetime.datetime(1601,1,1)
    delta = datetime.timedelta(microseconds=int(timestamp))
    fulltime = epoch_start + delta
    string = str(fulltime)
    timeprint = string[:19]
    exportfile.write("ID: " + str(row[0]) + "\t")
    exportfile.write("visit time: " + str(timeprint) + "\t")
    exportfile.write("Url: " + str(row[2]) + "\t")
    exportfile.write("Visit count: " + str(row[3]))
    exportfile.write("\n")
    print "ID: " + str(row[0]) + "\t"
    print "visit time: " + str(timeprint) + "\t"
    print "Url: " + str(row[2]) + "\t"
    print "Visit count: " + str(row[3])
    print "\n"   
conn.close()

因此，打印结果会给出正确的结果，但是导出到文件的位置会在网址中间停止。

Answer 1

好的，我将从下面的for循环开始

with open('chrome_report.txt', 'w') as exportfile:
    for row in results:
        try:
            timestamp = row[1]
            epoch_start = datetime.datetime(1601,1,1)
            delta = datetime.timedelta(microseconds=int(timestamp))
            fulltime = epoch_start + delta
            string = str(fulltime)
            timeprint = string[:19]
            exportfile.write("ID: " + str(row[0]) + "\t")
            exportfile.write("visit time: " + str(timeprint) + "\t")
            exportfile.write("Url: " + str(row[2]) + "\t")
            exportfile.write("Visit count: " + str(row[3]))
            exportfile.write("\n")
            print "ID: " + str(row[0]) + "\t"
            print "visit time: " + str(timeprint) + "\t"
            print "Url: " + str(row[2]) + "\t"
            print "Visit count: " + str(row[3])
            print "\n"
        except Exception as err:
            print(err)

通过使用“ with”语句（上下文管理器），我们无需关闭文件。通过使用try / except，我们捕获了错误并进行打印。这将向您显示代码失败的原因以及原因。

Python脚本写入文件到特定点后停止

1 个答案: