Python 将多个变量写入文件
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Write multiple variables to a file
提问by mahmood
I want to write two variable to a file using Python.
我想使用 Python 将两个变量写入文件。
Based on what is stated in this postI wrote:
f.open('out','w')
f.write("%s %s\n" %str(int("0xFF",16)) %str(int("0xAA",16))
But I get this error:
但我收到此错误：
Traceback (most recent call last):
File "process-python", line 8, in <module>
o.write("%s %s\n" %str(int("0xFF", 16)) %str(int("0xAA", 16)))
TypeError: not enough arguments for format string
采纳答案by cmd
You are not passing enough values to %, you have two specifiers in your format string so it expects a tuple of length 2. Try this:
您没有将足够的值传递给%，您的格式字符串中有两个说明符，因此它需要一个长度为 2 的元组。试试这个：
f.write("%s %s\n" % (int("0xFF" ,16), int("0xAA", 16)))
回答by aldeb
回答by kindall
This should probably be written as:
这大概应该写成：
f.write("255 170\n")
回答by David Marek
The % operator takes an object or tuple. So the correct way to write this is:
% 运算符接受一个对象或元组。所以正确的写法是：
f.write("%s %s\n" % (int("0xFF", 16), int("0xAA",16)))
There are also many other ways how to format a string, documentation is your friend http://docs.python.org/2/library/string.html
还有很多其他方法如何格式化字符串，文档是你的朋友http://docs.python.org/2/library/string.html
回答by Mike Müller
You need to supply a tuple:
您需要提供一个元组：
f.open('out','w')
f.write("%d %d\n" % (int("0xFF",16), int("0xAA",16)))
回答by Jon Clements
Firstly, your opening the file is wrong f.open('out', 'w')should probably be:
首先，您打开文件错误f.open('out', 'w')应该是：
f = open('out', 'w')
Then, for such simple formatting, you can use print, for Python 2.x, as:
然后，对于这种简单的格式化，您可以使用print, for Python 2.x，如下所示：
print >> f, int('0xff', 16), int('0xaa', 16)
Or, for Python 3.x:
或者，对于 Python 3.x：
print(int('0xff', 16), int('0xaa', 16), file=f)
Otherwise, use .format:
否则，请使用.format：
f.write('{} {}'.format(int('0xff', 16), int('0xaa', 16)))
