Question

我有一个文件：

one two three
four five six

我试过这个命令：

python -c "import sys; print ''.join(x.replace("two", "xxx") for x in sys.stdin)"  < file

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<string>", line 1, in <genexpr>
NameError: global name 'two' is not defined

我想得到结果：

one xxx three
four five six

如何改进上述例子？

Answer 1

您必须反斜杠（转义）two和xxx或单引号。这将有效

python -c "import sys; print ''.join(x.replace(\"two\", \"xxx\") for x in sys.stdin)" < file

Answer 2

你没有正确地逃避双引号

python -c 'import sys; print "".join(x.replace("two", "xxx") for x in sys.stdin)'  < filename

Python如何改进这个例子？

2 个答案: