将文件的最后一行与Python中的字符串进行比较

Question

我是一个Python noob，正试图编写一个脚本来获取两个intelhex文件（一个用于我的应用程序代码，一个用于引导加载程序），从第一个文件中剥离EOF记录，将第二个文件附加到第一个文件的剥离版本，并另存为一个新文件。我已经把所有的东西都准备好了，但后来我决定做得更好：我要确保第一个文件的最后一行真正匹配Intel EOF记录格式。不过，我似乎不能正确地理解这个条件的语法。在

appFile = open("MyAppFile.hex", "r")
lines = appFile.readlines()
appFile.close()

appStrip = open("MyAppFile and BootFile.hex",'w')

if appStrip.readline[:] == ":00000001FF":  #Python complains about "builtin_function_or_method" not subscriptable here
    appStrip.writelines([item for item in lines[:-1]])
    appStrip.close()
else:
    print("No EOF record in last line. File may be corrupted.")

appFile = open("MyAppFile and BootFile", "r")
appObcode = appFile.read()
appFile.close()

bootFile = open("MyBootFile", "r")
bootObcode = bootFile.read()
bootFile.close()

comboData = appObcode + bootObcode

comboFile = open("MyAppFile and BootFile", "w")
comboFile.write(comboData)
comboFile.close()

任何其他的建议，以一个更清洁或更安全的版本，也欢迎。在

更新： 添加了一行打印最后一行；我得到了预期的输出，但是每次比较仍然失败。以下是当前的完整程序：

^{pr2}$

更新2: 尝试修改支票以包含回车符和换行符，如下所示：

EOF = appLines[len(appLines)-1]

print(EOF)

if EOF != (":00000001FF","\r","\n"):
    print("No EOF record in last line of file. File may be corrupted.")

还是不走运。在

Answer 1

下面是一个更简单的版本：

app = open("app.hex").read()
if not app.endswith(":00000001FF"):
   print("No EOF")
combo = open("combo.hex","w")
combo.write(app)
boot = open("boot.hex").read()
combo.write(boot)
combo.close() # it's automatic after program ended

Answer 2

最后解决了这个问题：我编写了一些测试代码来输出Python正在读取的字符串的长度。结果是12个字符，但只有11个字符显示。所以我知道其中一个“看不见”的字符一定是回车符或换行符。两者都试过了；结果是换行（换行）。在

这里是“未优化的代码”：

appFile = open("MyAppFile.hex")

appLines = appFile.readlines()

appFile = open("MyAppFile.hex").read()

EOF = appLines[len(appLines)-1]

if EOF != (":00000001FF\n"):
    print("No EOF record in last line of file. File may be corrupted.")
else:
    with open("MyAppFile and Boot.hex", "a") as appStrip:
        appStrip.writelines([item for item in appLines[:-1]])

    with open("MyAppFile and Boot.hex", "r") as appFile:
        appObcode = appFile.read()

    with open("MyBootFile.hex", "r") as bootFile:
        bootObcode = bootFile.read()

    comboData = appObcode + bootObcode

    with open("MyAppFile and Boot.hex", "w") as comboFile:
        comboFile.write(comboData)