Basic Python 3 Win 10 Search Txt to File Newbie

[snippsat]

Can write it it like this.

match = 'VisaRen'
with open('lines.txt') as f,open('new.txt', 'w') as f_out:
    for line in f:
        if match in line:
            f_out.write(line)

However, is there a simpler "Line Input, Write" routine until the end of file ("While Not EOF")?

Python always read to EOF,if not stop it in anyway.
So for line in f: read one line(memory effective) at time to EOF.