right-hand operand 右手操作数
Click the right operand?, select enter text and enter 3.
单击右侧的operand ？，选择Enter Text并输入3。
If there is more than one format in the string, you need to pass a tuple as right operand, as in this example.
如果有超过一个的字符串要格式化为一体，就需要将它们传入一个元组做为右值，如下所示。
The left operand is a string expression, and the right operand is a string containing the pattern to be used for matching.
左侧操作数为字符串表达式，右侧操作数为包含匹配所用模式的字符串。
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