Python 如何使用字符串格式打印“%”符号？
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How do I print a '%' sign using string formatting?
提问by Eric1989
I've made a little script to calculator percent; however, I wish to actually include the '%' within the message printed...
我制作了一个小脚本来计算百分比；但是，我希望在打印的消息中实际包含 '%'...
Tried this at the start - didn't work...
一开始就试过这个 - 没有用...
oFile.write("Percentage: %s%"\n" % percent)
oFile.write("百分比：%s%"\n" %%)
I then tried "Percentage: %s"%"\n" % percent"which didn't work.
然后我尝试了"Percentage: %s"%"\n" % percent"哪个不起作用。
I'd like the output to be: Percentage: x%
我希望输出为：百分比：x%
I keep getting "TypeError: not all arguments converted during string formatting"
我不断收到“类型错误：并非所有参数都在字符串格式化期间转换”
采纳答案by bvidal
To print the %sign you need to 'escape' it with another %sign:
要打印%标志，您需要用另一个%标志“转义”它：
percent = 12
print "Percentage: %s %%\n" % percent # Note the double % sign
>>> Percentage: 12 %
回答by GLHF
Or use format()function, which is more elegant.
或者使用format()函数，更优雅。
percent = 12
print "Percentage: {}%".format(percent)
4 years later edit
4年后编辑
Now In Python3x print()requires parenthesis.
现在在 Python3x 中print()需要括号。
percent = 12
print ("Percentage: {}%".format(percent))
回答by js837
回答by Thomas Vetterli
format()is more elegant but the modulo sign seems to be quicker!
format()更优雅，但模符号似乎更快！
http://inre.dundeemt.com/2016-01-13/string-modulo-vs-format-fight/- shows that modulo is ~30% faster!
http://inre.dundeemt.com/2016-01-13/string-modulo-vs-format-fight/- 显示模数快了约 30%！
回答by Ram Prajapati
x = 0.25
y = -0.25
print("\nOriginal Number: ", x)
print("Formatted Number with percentage: "+"{:.2%}".format(x));
print("Original Number: ", y)
print("Formatted Number with percentage: "+"{:.2%}".format(y));
print()
Sample Output:
示例输出：
Original Number: 0.25
Formatted Number with percentage: 25.00%
Original Number: -0.25
Formatted Number with percentage: -25.00%
Helps in proper formatting of percentage value
有助于正确格式化百分比值
+++
+++
Using ascii value of percentage - which is 37
使用百分比的 ascii 值 - 即 37
print( '12' + str(chr(37)) )
