Python if else语句未传递或未读取tx

Question

我正在计算文件“Index40”中的行数。一共有11436排。我把这个数字以字符串的形式保存在一个txt文件中。我希望我的代码每天晚上都计算这个文件中的行数，如果行数等于作为单个字符串值存储的行数，我希望脚本结束，否则重写文本文件中的行数并继续执行脚本。我的问题是脚本总是认为行数不等于txt值。代码如下：

lyrfile = r"C:\Hubble\Cimage_Project\MapData.gdb\Index40"
result = int(arcpy.GetCount_management(lyrfile).getOutput(0))
textResult = str(result)
with open(r'C:\Hubble\Cimage_Project\Index40Count.txt', 'r+') as a:
    if a == textResult:
        pass  
    else:
        a.write(textResult)
        #then do a bunch more code
        print "not passing"

Answer 1

似乎您正在比较textResult和a，后者是文件对象。你知道吗

如果需要文件的内容，则需要从file对象中读取，例如a.read()以将文件的全部内容作为字符串。你知道吗

所以我觉得你在找这样的东西：

with open(r'C:\Hubble\Cimage_Project\Index40Count.txt', 'r+') as a:
    contents = a.read() # read the entire file
    if contents != textResult:
        a.seek( 0 ) # seek back to the beginning of the file
        a.truncate() # truncate in case the old value was longer than the new value
        a.write(textResult)
        #then do a bunch more code
        print "not passing"

Answer 2

假设“行”是一个以新行字符结尾的字符串（因此，“行”是文件中的“行”），您可以这样做来获得总行数，并使用它与初始行数进行比较

with open(r'C:\Hubble\Cimage_Project\Index40Count.txt', 'r+') as f:
    allLines = f.readlines() # get all lines
    rowCount = len(allLines) # get length of all lines
    if rowCount == result:
        # do something when they are equal
    else:
        # do something when they are not equal