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Regular Expression
r"
(\d\s*,)(?=\s*\d)|,
"
gm
Input 1
New
foo, bar 12,6 => foo bar 12,6 foo, bar 12, 6 => foo bar 12, 6 foo, bar 12 ,6 => foo bar 12 ,6 foo, bar 12, => foo bar 12 foo, bar ,6 => foo bar 6 foo,5 => foo5 foo ,5 => foo 5
Extraction
foo, bar 12,6 => foo bar 12,6 foo, bar 12, 6 => foo bar 12, 6 foo, bar 12 ,6 => foo bar 12 ,6 foo, bar 12, => foo bar 12 foo, bar ,6 => foo bar 6 foo,5 => foo5 foo ,5 => foo 5