Regex to remove new lines up to a specific character

Question

I have a series of strings in a file of the format:

>HEADER_Text1
Information here, yada yada yada
Some more information here, yada yada yada
Even some more i         


        

Answer 1

this should also work.

sampleText=""">HEADER_Text1 Information here, yada yada yada Some more information here, yada yada yada Even some more information here, yada yada yada

HEADER_Text2 Information here, yada yada yada Some more information here, yada yada yada Even some more information here, yada yada yada HEADER_Text3 Information here, yada yada yada Some more information here, yada yada yada Even some more information here, yada yada yada""""

cleartext = re.sub ("\n(?!>)", "", sampleText)

print cleartext

HEADER_Text1Information here, yada yada yadaSome more information here, yada yada yadaEven some more information here, yada yada yada HEADER_Text2Information here, yada yada yadaSome more information here, yada yada yadaEven some more information here, yada yada yada HEADER_Text3Information here, yada yada yadaSome more information here, yada yada yadaEven some more information here, yada yada yada