如何在字符串中的数字前换行

Question

我想在数字前截断字符串，这样它将形成一个新字符串。我将确保除步骤外没有其他数字（例如用于测量）。

示例：

a = 'HOW TO COOK RICE - Chapter 1: 1 rinse water once 2 add one and a half cup of water for every cup of rice 3 cover the pot and simmer'

结果应在除章节数字之外的所有数字前换行

HOW TO COOK RICE - Chapter 1
1 rinse water once
2 add one and a half cup of water for every cup of rice
3 cover the pot and simmer

Answer 1

使用正则表达式

a = 'HOW TO COOK RICE - Chapter 1: 1 rinse water once 2 add one and a half cup of water for every cup of rice 3 cover the pot and simmer'
idx=[i.start() for i in re.finditer('(\d{1,} \w{1,})', a)]
if idx:
    print(a[:idx[0]])
else:
    print(a)
for i,index in enumerate(idx):
    if not i==len(idx)-1:
        print(a[index:idx[i+1]])
    else:
        print(a[idx[i]:])

输出

HOW TO COOK RICE - Chapter 1: 
1 rinse water once 
2 add one and a half cup of water for every cup of rice 
3 cover the pot and simmer