Question

我有一个非常简单的python脚本，它读入一个文件，并逐行解析。

似乎没有在我的行开头识别'//'。如果我改变它以在我的行的开头寻找'＃'，它也找不到那些行。我只是误解了这个吗？

line = fIn.readline()

while line:
    print "line is", line
    line = line.strip()
    if line.startswith('//'):
        print "winner"
    line = fIn.readline()

我正在阅读的文件如下：

// Feedback
"Feedback" = "Feedback";

// New strings
"File URL not reachable." = "File URL not reachable.";

当打印输出时，调试行看起来合适：

line is // Feedback

line is "Feedback" = "Feedback";

line is 

line is // New strings

line is "File URL not reachable." = "File URL not reachable.";

line is

Answer 1

更好的版本：

with open("abc") as f:
    for line in f:
        line=line.strip()
        if line and line.startswith("//"):
            print "line is",line
            print "winner"
            print next(f)
   ....:

<强>输出：

line is // Feedback
winner
"Feedback" = "Feedback";

line is // New strings
winner
"File URL not reachable." = "File URL not reachable.";

Answer 2

您只是阅读文本文件的一行。除了你在最后一行有错误的缩进，它似乎工作。确保在每次迭代时执行line = fIn.readline()后运行程序（向左移动一个块）。

这是我修复一行后获得的，这是所需的输出吗？

line is // Feedback

winner
line is "Feedback" = "Feedback";

line is  

line is // New strings

winner
line is "File URL not reachable." = "File URL not reachable.";

编辑：这对你有用吗？

for line in open("yourfile.txt").readlines():
    print "line is", line
    line = line.strip()
    if line.startswith('//'):
        print "winner"

Answer 3

试试这个

for line in fIn:
    print "line is", line
    line = line.strip()
    if line[0:2]=='//':
        print "winner"
        line = fIn.readline()

startswith（）在我的字符串前面找不到'//'

3 个答案: