Question

所以我正在编写一个程序来从卸载注册表中查找转储中的特定行，然后将这些行写入新的文本文件。这是代码。

fileName = "export.txt"
outputFileName = input("Enter the Output File Name")
inputFile = open(fileName, "r")
outputFile = open(outputFileName, "w")
displayName = ""
displayVersion = ""
publisher = ""

for line in inputFile:
    if "DisplayName" in line:
        lst = line.split("=")
        displayName = lst[1][1:len(lst[1])-1]

    if "DisplayVersion" in line:
        lst = line.split("=")
        displayVersion = lst[1][1:len(lst[1])-1]
    if "Publisher" in line:
        lst = line.split("=")
        publisher = lst[1][1:len(lst[1])-1]
    if displayName!= "" or displayVersion != "" or publisher != "":
        outputFile.write(displayName + "\t" + displayVersion + "\t" +publisher + "\n")
        displayName = ""
        displayVersion = ""
        publisher = ""

inputFile.close()
outputFile.close()

由于某种原因，没有输入前三个if语句。以下是export.txt文本文件的片段。

[HKEY_LOCAL_MACHINE\SoftWare\Microsoft\Windows\CurrentVersion\Uninstall\Matlab R2016b]
"DisplayName"="MATLAB R2016b"
"UninstallString"="C:\\Program Files\\MATLAB\\R2016b\\uninstall\\bin\\win64\\uninstall.exe C:\\Program Files\\MATLAB\\R2016b"
"DisplayIcon"="C:\\Program Files\\MATLAB\\R2016b\\bin\\win64\\matlab.ico"
"InstallLocation"="C:\\Program Files\\MATLAB\\R2016b"
"DisplayVersion"="9.1"
"URLInfoAbout"="www.mathworks.com"
"Publisher"="MathWorks"
"HelpLink"="www.mathworks.com/support"
"Comments"=" "    

ê[HKEY_LOCAL_MACHINE\SoftWare\Microsoft\Windows\CurrentVersion\Uninstall\Matlab
R2016b]
“DisplayName””MATLAB R201 6b”
“UninstallString””C: \\Prograrn
Files\\MATLAB\\R2016b\\uninstall\\bin\\win64\\uninstall.exe C: \\Prograrn
Files\\frIATLAB\\R201 6b”
“Displaylcon””C:\\Prograrn Files\\MATLAB\\R2016b\\bin\\win64\\matlab. ico”
“InstallLocation””C: \\Prograrn Files\\MATLAB\\R201 6b”
“DisplayVersion””9. 1”
“URLlnfoAbout””www. mathworks. corn”
“Publisher”=”MathWorks”
“HelpLink””www. rnathworks. corn/support”
“Comments”” “

Answer 1

使用find（）以不同方式检查怎么办？

if line.find("DisplayName") != -1:
    do stuff.

我跑得很好，这里是代码：

fileName = "export.txt"
outputFileName = input("Enter the Output File Name")
inputFile = open(fileName, "r")
outputFile = open(outputFileName, "w")
displayName = ""
displayVersion = ""
publisher = ""

for line in inputFile:
    print line
    if line.find("DisplayName") != -1:
        lst = line.split("=")
        displayName = lst[1][1:len(lst[1])-2]

    if line.find("DisplayVersion") != -1:
        print "here2"
        lst = line.split("=")
        displayVersion = lst[1][1:len(lst[1])-2]
    if line.find("Publisher") != -1:
        print "here3"
        lst = line.split("=")
        publisher = lst[1][1:len(lst[1])-2]
    if displayName!= "" and displayVersion != "" and publisher != "":
        print "Here4"
        print displayName + "\t" + displayVersion + "\t" +publisher
        outputFile.write(displayName + "\t" + displayVersion + "\t" +publisher)
        displayName = ""
        displayVersion = ""
        publisher = ""

inputFile.close()
outputFile.close()

生产： MATLAB R2016b 9.1 MathWorks

运行脚本时的输出如下所示：

输入输出文件名＆＃34; out.txt＆＃34; [HKEY_LOCAL_MACHINE \ SoftWare \ Microsoft \ Windows \ CurrentVersion \ Uninstall \ Matlab R2016b]

＆＃34; DisplayName＆＃34; =＆＃34; MATLAB R2016b＆＃34;

＆＃34; UninstallString＆＃34; =＆＃34; C：\ Program Files \ MATLAB \ R2016b \ uninstall \ bin \ win64 \ uninstall.exe C：\ Program Files \ MATLAB \ R2016b＆＃34;

＆＃34; DisplayIcon＆＃34; =＆＃34; C：\ Program Files \ MATLAB \ R2016b \ bin \ win64 \ matlab.ico＆＃34;

＆＃34; InstallLocation＆＃34; =＆＃34; C：\ Program Files \ MATLAB \ R2016b＆＃34;

＆＃34; DisplayVersion＆＃34; =＆＃34; 9.1＆＃34;

here2 ＆＃34; URLInfoAbout＆＃34; =＆＃34; www.mathworks.com＆＃34;

＆＃34;出版者＆＃34; =＆＃34; The MathWorks公司＆＃34;

here3 Here4 MATLAB R2016b 9.1 MathWorks ＆＃34; HELPLINK＆＃34; =＆＃34; www.mathworks.com/support"

＆＃34;注释＆＃34; =＆＃34; ＆＃34;

Answer 2

你最后一句if语句的逻辑完全相反。它应该是或代替并且为了使您的陈述正常工作。

Python无法在文件中找到字符串

2 个答案: