How to print two strings (large text) side by side in python?

How do I write code in Python to do this? I want to read two strings that are multiple lines and much text, mainly to compare how similar they are (qualitatively.)

    s1 = 'I want to read these texts side by side and see how similar they really are'
    s2 = 'I really want to read these here texts side by side to see how similar they are (qualitatively)'
    print_side_by_side(s1,s2)

Output:

    I want to read these texts side by side and see ho   I really want to read these here texts side by sid
    w similar they really are                            e to see how similar they are (qualitatively)     

Here's an approach using slicing:

def print_side_by_side(a, b, size=30, space=4):
    while a or b:
        print(a[:size].ljust(size) + " " * space + b[:size])
        a = a[size:]
        b = b[size:]

s1 = 'I want to read these texts side by side and see how similar they really are'
s2 = 'I really want to read these here texts side by side to see how similar they are (qualitatively)'
print_side_by_side(s1, s2)

Output:

I want to read these texts sid    I really want to read these he
e by side and see how similar     re texts side by side to see h
they really are                   ow similar they are (qualitati
                                  vely)

This can be generalized to work on any number of strings:

def side_by_side(strings, size=30, space=4):
    strings = list(strings)
    result = []

    while any(strings):
        line = []

        for i, s in enumerate(strings):
            line.append(s[:size].ljust(size))
            strings[i] = s[size:]

        result.append((" " * space).join(line))
    
    return "\n".join(result)

if __name__ == "__main__":
    strings = "aaaaaaaa", "bbbbbbbbbbbbbb", "ccccccc"
    print(side_by_side(strings, size=5, space=1))

Output:

aaaaa bbbbb ccccc
aaa   bbbbb cc
      bbbb

If you want to handle strings with newlines, either pre-split them in advance of calling this algorithm or try something like:

def side_by_side(strings, size=30, space=4):
    strings = list(strings)
    result = []

    while any(strings):
        line = []

        for i, s in enumerate(strings):
            buf = s[:size]
            
            try:
                n = buf.index("\n")
                line.append(buf[:n].ljust(size))
                strings[i] = s[n+1:]
            except ValueError:
                line.append(buf.ljust(size))
                strings[i] = s[size:]

        result.append((" " * space).join(line))
    
    return "\n".join(result)

Note that if you're looking for more capability than this, Python has an industrial-strength solution for general diffing called difflib.