Question: I am trying to run some python code which includes some tiktoken calls. I've tried to install tiktoken for python but i can't. I am trying to install with pip command but i am getting an error about rust. I am wondering if i should install some rust "thing" outside of python or pip. Collecting tiktoken Using cached tiktoken-0.3.3.tar.gz (25 kB) Installing build dependencies ... done Getting requirements to build wheel ... done Preparing metadata (pyproject.toml) ... done Requirement already satisfied: requests>=2.26.0 in g:\program files\python\lib\site-packages (from tiktoken) (2.28.2) Collecting regex>=2022.1.18 Using cached regex-2023.3.23-cp38-cp38-win32.whl (256 kB) Requirement already satisfied: idna<4,>=2.5 in g:\program files\python\lib\site-packages (from requests>=2.26.0->tiktoken) (2.9) Requirement already satisfied: certifi>=2017.4.17 in g:\program files\python\lib\site-packages (from requests>=2.26.0->tiktoken) (2020.4.5.1) Requirement already satisfied: charset-normalizer<4,>=2 in g:\program files\python\lib\site-packages (from requests>=2.26.0->tiktoken) (3.1.0) Requirement already satisfied: urllib3<1.27,>=1.21.1 in g:\program files\python\lib\site-packages (from requests>=2.26.0->tiktoken) (1.26.15) Building wheels for collected packages: tiktoken Building wheel for tiktoken (pyproject.toml) ... error error: subprocess-exited-with-error × Building wheel for tiktoken (pyproject.toml) did not run successfully. │ exit code: 1 ╰─> [37 lines of output] running bdist_wheel running build running build_py creating build creating build\lib.win32-cpython-38 creating build\lib.win32-cpython-38\tiktoken copying tiktoken\core.py -> build\lib.win32-cpython-38\tiktoken copying tiktoken\load.py -> build\lib.win32-cpython-38\tiktoken copying tiktoken\model.py -> build\lib.win32-cpython-38\tiktoken copying tiktoken\registry.py -> build\lib.win32-cpython-38\tiktoken copying tiktoken\__init__.py -> build\lib.win32-cpython-38\tiktoken creating build\lib.win32-cpython-38\tiktoken_ext copying tiktoken_ext\openai_public.py -> build\lib.win32-cpython-38\tiktoken_ext running egg_info writing tiktoken.egg-info\PKG-INFO writing dependency_links to tiktoken.egg-info\dependency_links.txt writing requirements to tiktoken.egg-info\requires.txt writing top-level names to tiktoken.egg-info\top_level.txt reading manifest file 'tiktoken.egg-info\SOURCES.txt' reading manifest template 'MANIFEST.in' warning: no files found matching 'Makefile' adding license file 'LICENSE' writing manifest file 'tiktoken.egg-info\SOURCES.txt' copying tiktoken\py.typed -> build\lib.win32-cpython-38\tiktoken running build_ext running build_rust error: can't find Rust compiler If you are using an outdated pip version, it is possible a prebuilt wheel is available for this package but pip is not able to install from it. Installing from the wheel would avoid the need for a Rust compiler. To update pip, run: pip install --upgrade pip and then retry package installation. If you did intend to build this package from source, try installing a Rust compiler from your system package manager and ensure it is on the PATH during installation. Alternatively, rustup (available at https://rustup.rs) is the recommended way to download and update the Rust compiler toolchain. [end of output] note: This error originates from a subprocess, and is likely not a problem with pip. ERROR: Failed building wheel for tiktoken Failed to build tiktoken ERROR: Could not build wheels for tiktoken, which is required to install pyproject.toml-based projects  I've tried "pip install tiktoken".

Answer: Pip is trying to build the tiktoken library from source and you are missing the Rust compiler. You can either install the Rust compiler on your system, or install tiktoken from a wheel instead of building it from source. See this issue in the tiktoken GitHub repo for more help