Text Indent Formatter

# Add, remove, or set indentation for each line
def add_indent(text, indent="    ", levels=1):
    prefix = indent * levels
    return "\n".join(prefix + line for line in text.splitlines())

def remove_indent(text, indent="    ", levels=1):
    result = []
    for line in text.splitlines():
        for _ in range(levels):
            if line.startswith(indent):
                line = line[len(indent):]
        result.append(line)
    return "\n".join(result)

def set_indent(text, indent="    ", levels=1):
    prefix = indent * levels
    return "\n".join(prefix + line.lstrip() for line in text.splitlines())

code = "def foo():\n    x = 1\n    return x"
print(add_indent(code, "  ", 1))
print(remove_indent(code, "    ", 1))
print(set_indent(code, "\t", 1))