Python从字符串中删除动态子字符串

Question

I need to remove dynamic substring from string. eg:

Item value1="001" value2="abc" value3="123xyz"

and i need output:

Item value1="001"  value3="123xyz"

I mean I need remove value2="abc". value2 is an unique element and can be placed anywhere in original string. "abc" is dynamic variable and can have various length. What is the fastest solution of this problem? Thank you.

Answer 1

regex should be pretty fast in this case:

import re
p = re.compile(r'value2="\w+"\s?')
re.sub(p, '', 'Item value1="001" value2="abc" value3="123xyz"')

the above works assuming the value for value2 has only alphabets (ie no digits or space-like charaters

Answer 2

You could try a list comprehension

a='Item value1="001" value2="abc" value3="123xyz"'
print(' '.join([e for e in a.split(" ") if not e.startswith('value2="')]))