41 lines
897 B
Markdown
41 lines
897 B
Markdown
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---
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title: String Replace Method
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localeTitle: 字符串替换方法
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---
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## 字符串替换方法
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`str.replace(old, new, max)`方法用于将字符串`old`替换为字符串`new` ，总计`max`次数。此方法返回带有替换的字符串的新副本。原始字符串`str`保持不变。
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#### 例子
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1. 用`"WAS"`替换所有出现的`"is"` `"WAS"`
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```python
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string = "This is nice. This is good."
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newString = string.replace("is","WAS")
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print(newString)
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```
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产量
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```python
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ThWAS WAS nice. ThWAS WAS good.
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```
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2. 用`"WAS"`替换前两次出现的`"is"` `"WAS"`
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```python
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string = "This is nice. This is good."
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newString = string.replace("is","WAS", 2)
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print(newString)
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```
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产量
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```python
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ThWAS WAS nice. This is good.
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```
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#### 更多信息：
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阅读[Python文档中](https://docs.python.org/2/library/string.html#string.replace)有关字符串替换的更多信息
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