如何从用空格关闭的字符串中排除子字符串？

Question

I would like to exclude substring starting from '>' and closing with ' '. Example:

#!/usr/bin/python

content = "classTest>528 points"
substring = content['>' : ' ']
print substring     # 528

Answer 1

Look up regexes. Here's a minimal working example for your test case:

import re

content = "classTest>528 points"
substring = re.search(r'>(\d+) ', content).group(1)
print substring

Answer 2

If you do not want to use regular expressions (which has a bit of a learning curve), you can use this simpler but longer code.

content = "classTest>528 points"
i = content.find('>')
j = content.find(' ', i+1)
substring = content[i+1:j]
print(substring)