格式化多行字符串时换行符的keyError

Question

print("xy{0}z".format(100))
xy100z

让我们尝试多行的字符串 字符串我想格式化它。

strs='''  
.item{0}{  
    background-image:url("img/item{0}_1.jpg");  
    background-repeat: no-repeat;  
    background-position: 0px 0px;  
}'''  

>>> print(strs)

.item{0}{
    background-image:url("img/item{0}_1.jpg");
    background-repeat: no-repeat;
    background-position: 0px 0px;
}

现在用一些数字格式化它。

print(strs.format(100))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: '\n    background-image'

Answer 1

您应该将{替换为{{ / }，}}代替{ / }。{/ p>

strs='''
.item{0}{{
    background-image:url("img/item{0}_1.jpg");
    background-repeat: no-repeat;
    background-position: 0px 0px;
}}'''  
print(strs.format(100))

打印：

.item100{
    background-image:url("img/item100_1.jpg");
    background-repeat: no-repeat;
    background-position: 0px 0px;
}