fix(guide): simplify directory structure

guide/english/python/string-methods/string-replace-method/index.md

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+---
+title: String Replace Method
+---
+## String Replace Method
+
+The `str.replace(old, new, max)` method is used to replace the substring `old` with the string `new` for a total of `max` times. This method returns a new copy of the string with the replacement. The original string `str` is unchanged.
+
+#### Examples
+
+1. Replace all occurrences of `"is"` with `"WAS"`
+
+```python
+string = "This is nice. This is good."
+newString = string.replace("is","WAS")
+print(newString)
+```
+
+Output
+```python
+ThWAS WAS nice. ThWAS WAS good.
+```
+
+2. Replace the first 2 occurrences of `"is"` with `"WAS"`
+
+```python
+string = "This is nice. This is good."
+newString = string.replace("is","WAS", 2)
+print(newString)
+```
+
+Output
+```python
+ThWAS WAS nice. This is good.
+```
+
+#### More Information:
+Read more about string replacement in the <a href='https://docs.python.org/2/library/string.html#string.replace' target='_blank' rel='nofollow'>Python docs</a>
+