花括号 ("{"和 "}"的 Python 字符串格式问题)

Question

我有一个 GraphQL 查询字符串作为

query = """
        {
          scripts(developers: "1") {
          
          ...
          ...
          }
        }
    """

问。如何使用 Python 字符串格式化技术更改 developers 的值？

到目前为止我已经尝试过，

1.使用f字符串

In [1]: query = f""" 
   ...:         { 
   ...:           scripts(developers: "1") { 
   ...:            
   ...:           ... 
   ...:           ... 
   ...:           } 
   ...:         } 
   ...:     """                                                                                                                                                                                                    
  File "<fstring>", line 2
    scripts(developers: "1") {
                      ^
SyntaxError: invalid syntax

2.使用.format()方法

In [2]: query = """ 
   ...:         { 
   ...:           scripts(developers: "{dev_id}") { 
   ...:            
   ...:           ... 
   ...:           ... 
   ...:           } 
   ...:         } 
   ...:     """ 
   ...:  
   ...: query.format(dev_id=123)                                                                                                                                                                                   
---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-2-058a3791fe41> in <module>
      9     """
     10 
---> 11 query.format(dev_id=123)

KeyError: '\n          scripts(developers'

Answer 1

使用双大括号而不是单大括号在 f 字符串中编写文字大括号:

dev_id = 1
query = f"""
        {{
          scripts(developers: "{dev_id}") {{
          
          ...
          ...
          }}
        }}
    """
print(query)
#        {
#          scripts(developers: "1") {
#          
#          ...
#          ...
#          }
#        }