> ## Documentation Index > Fetch the complete documentation index at: https://site.aspect.build/llms.txt > Use this file to discover all available pages before exploring further. # Memory `function` **Memory.grow** 
        
          def Memory.grow(
          by: int,
          /
          ) -> int
`function` **Memory.read** 
        
          def Memory.read(
          offset: int,
          length: int,
          /
          ) -> bytes
Reads bytes from wasm linear memory. # Example ```starlark theme={null} # Get pointer and length from a wasm function result = wasm_instance.exports.get_data() ptr = result & 0xFFFFFFFF length = (result >> 32) & 0xFFFFFFFF # Read the data from wasm memory data = memory.read(ptr, length) print(str(data)) ``` **Parameters** * `offset`: - The byte offset in wasm memory to start reading from * `length`: - The number of bytes to read `function` **Memory.read\_cstring** 
        
          def Memory.read\_cstring(
          ptr: int,
          /,
          \*,
          max\_len: int = 4096
          ) -> str
Read a null-terminated C string from memory. **Parameters** * `ptr`: - The byte offset in wasm memory to start reading from * `max_len`: - Maximum number of bytes to scan for null terminator (default: 4096) `function` **Memory.read\_string** 
        
          def Memory.read\_string(
          ptr: int,
          len: int,
          /
          ) -> str
Read a UTF-8 string from memory with explicit length. **Parameters** * `ptr`: - The byte offset in wasm memory to start reading from * `len`: - The number of bytes to read `function` **Memory.write** 
        
          def Memory.write(
          offset: int,
          buffer: typing.Any,
          /
          ) -> None
`function` **Memory.write\_string** 
        
          def Memory.write\_string(
          ptr: int,
          s: str,
          /
          ) -> int
Write a string to memory at the given pointer. **Parameters** * `ptr`: - The byte offset in wasm memory to write to * `s`: - The string to write