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Merge pull request youngyangyang04#2873 from iqna126/master

添加0054.替换数字.md python版本

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problems/kamacoder
- 0054.替换数字.md

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`‎problems/kamacoder/0054.替换数字.md‎`

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Original file line number	Diff line number	Diff line change
`@@ -21,7 +21,7 @@`
`21`	`21`
`22`	`22`	`## 思路`
`23`	`23`
`24`		`-如果想把这道题目做到极致,就不要只用额外的辅助空间了! (不过使用Java刷题的录友,一定要使用辅助空间,因为Java里的string不能修改)`
	`24`	`+如果想把这道题目做到极致,就不要只用额外的辅助空间了! (不过使用Java和Python刷题的录友,一定要使用辅助空间,因为Java和Python里的string不能修改)`
`25`	`25`
`26`	`26`	`首先扩充数组到每个数字字符替换成 "number" 之后的大小。`
`27`	`27`
`@@ -215,6 +215,46 @@ public class Main {`
`215`	`215`	`}`
`216`	`216`	```
`217`	`217`
	`218`	`+### Python:`
	`219`	+```python
	`220`	`+class Solution(object):`
	`221`	`+ def subsitute_numbers(self, s):`
	`222`	`+ """`
	`223`	`+ :type s: str`
	`224`	`+ :rtype: str`
	`225`	`+ """`
	`226`	`+`
	`227`	`+ count = sum(1 for char in s if char.isdigit()) # 统计数字的个数`
	`228`	`+ expand_len = len(s) + (count * 5) # 计算扩充后字符串的大小, x->number, 每有一个数字就要增加五个长度`
	`229`	`+ res = [''] * expand_len`
	`230`	`+`
	`231`	`+ new_index = expand_len - 1 # 指向扩充后字符串末尾`
	`232`	`+ old_index = len(s) - 1 # 指向原字符串末尾`
	`233`	`+`
	`234`	`+ while old_index >= 0: # 从后往前, 遇到数字替换成"number"`
	`235`	`+ if s[old_index].isdigit():`
	`236`	`+ res[new_index-5:new_index+1] = "number"`
	`237`	`+ new_index -= 6`
	`238`	`+ else:`
	`239`	`+ res[new_index] = s[old_index]`
	`240`	`+ new_index -= 1`
	`241`	`+ old_index -= 1`
	`242`	`+`
	`243`	`+ return "".join(res)`
	`244`	`+`
	`245`	`+if __name__ == "__main__":`
	`246`	`+ solution = Solution()`
	`247`	`+`
	`248`	`+ while True:`
	`249`	`+ try:`
	`250`	`+ s = input()`
	`251`	`+ result = solution.subsitute_numbers(s)`
	`252`	`+ print(result)`
	`253`	`+ except EOFError:`
	`254`	`+ break`
	`255`	`+`
	`256`	+```
	`257`	`+`
`218`	`258`	`### Go:`
`219`	`259`	````go
`220`	`260`	`package main`

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