实战Mojo🔥安装 & 使用，Python 开发者不必惊慌

def sort(v: ArraySlice[Int]):
  for i in range(len(v)):
    for j in range(len(v) - i - 1):
      if v[j] > v[j + 1]:
        swap(v[j], v[j + 1])

struct MyPair:
  var first: Int
  var second: F32
  
  def __init__(self, first: Int, second: F32):
    self.first = first
    self.second = second

def reorder_and_process(owned x: HugeArray):
  sort(x)	# Update in place
  
  give_away(x^)	# Transfer ownership
  
  print(x[0])	# Error: ‘x’ moved away!

def exp[dt: DType, elts: Int]
    (x: SIMD[dt, elts]) -> SIMD[dt, elts]:
  x = clamp(x, -88.3762626647, 88.37626266)
  k = floor(x * INV_LN2 + 0.5)
  r = k * NEG_LN2 + x
  return ldexp(_exp_taylor(r), k)

def exp_buffer[dt: DType](data: ArraySlice[dt]):

  # Search for the best vector length
  alias vector_len = autotune(1, 4, 8, 16, 32)
  
  # Use it as the vectorization length
  vectorize[exp[dt, vector_len]](data)

yuangezhizao@MacMini ~ % brew search python@3
==> Formulae
boost-python3       python@3.12 ✔       python@3.9 ✔        cython
python@3.10 ✔       python@3.7          ipython             jython
python@3.11 ✔       python@3.8          bpython
yuangezhizao@MacMini ~ % brew upgrade python@3.11
Warning: python@3.11 3.11.9 already installed
yuangezhizao@MacMini ~ % python3.11
Python 3.11.9 (main, Apr  2 2024, 08:25:04) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>
zsh: suspended  python3.11

yuangezhizao@MacMini ~ % curl -s https://get.modular.com | sh -
Updating Homebrew
==> Updating Homebrew...
Already up-to-date.
Installing/upgrading Modular using Homebrew
==> Tapping modularml/packages
Cloning into '/opt/homebrew/Library/Taps/modularml/homebrew-packages'...
remote: Enumerating objects: 120, done.
remote: Counting objects: 100% (120/120), done.
remote: Compressing objects: 100% (67/67), done.
remote: Total 120 (delta 29), reused 100 (delta 24), pack-reused 0
Receiving objects: 100% (120/120), 14.28 KiB | 2.86 MiB/s, done.
Resolving deltas: 100% (29/29), done.
Tapped 1 formula (13 files, 23.2KB).
==> Fetching modularml/packages/modular
==> Downloading https://dl.modular.com/public/installer/raw/names/modular-mac-ar
==> Downloading from https://dl.modular.com/public/installer/raw/names/modular-m
######################################################################### 100.0%
==> Installing modular from modularml/packages

cat <<EOF
  __  __           _       _
 |  \/  | ___   __| |_   _| | __ _ _ __
 | |\/| |/ _ \ / _\` | | | | |/ _\` | '__|
 | |  | | (_) | (_| | |_| | | (_| | |
 |_|  |_|\___/ \__,_|\__,_|_|\__,_|_|

Welcome to the Modular CLI!

To get started, see:
MAX - https://modul.ar/get-started
Mojo - https://modul.ar/mojo-get-started

For info about this tool, type "modular --help".
EOF
==> Caveats
The Modular tool expects or will create a MODULAR_HOME directory.
This defaults to `~/.modular`. You can create your own, and if you do,
please add `MODULAR_HOME=/path/to/your/dir` to your environment.
==> Summary
🍺  /opt/homebrew/Cellar/modular/0.7.1: 6 files, 61.4MB, built in 4 seconds
==> Running `brew cleanup modular`...
Disable this behaviour by setting HOMEBREW_NO_INSTALL_CLEANUP.
Hide these hints with HOMEBREW_NO_ENV_HINTS (see `man brew`).

yuangezhizao@MacMini ~ % modular auth
To complete auth, open this web page:
https://developer.modular.com/device?userCode=MPFL-<rm>

Verify using this code:
MPFL-<rm>

Waiting for confirmation...

yuangezhizao@MacMini ~ % modular install mojo
# Found release for https://packages.modular.com/mojo @ 24.2.1-2f0dcf11-release
# Downloading archive: packages/24.2.1-2f0dcf11-release/mojo-arm64-apple-darwin22.6.0-24.2.1-2f0dcf11-release-12-0.tar.gz
Downloaded   [ ██████████████████████████ ] 100%     167MiB/167MiB
# Extracting downloaded archives.
Extracted    [ ██████████████████████████ ] 100%     167MiB/167MiB
# Extraction complete, setting configs...
# Configs complete, running post-install hooks...

🔥 Mojo installed! 🔥

Mojo's Python virtual environment created at /Users/yuangezhizao/.modular/pkg/packages.modular.com_mojo/venv

If you are using ZSH (default on macOS), run the following commands:

echo 'export MODULAR_HOME="/Users/yuangezhizao/.modular"' >> ~/.zshrc
echo 'export PATH="/Users/yuangezhizao/.modular/pkg/packages.modular.com_mojo/bin:$PATH"' >> ~/.zshrc
source ~/.zshrc

If you are using bash, run the following commands:

BASHRC=$( [ -f "$HOME/.bash_profile" ] && echo "$HOME/.bash_profile" || echo "$HOME/.bashrc" )
echo 'export MODULAR_HOME="/Users/yuangezhizao/.modular"' >> "$BASHRC"
echo 'export PATH="/Users/yuangezhizao/.modular/pkg/packages.modular.com_mojo/bin:$PATH"' >> "$BASHRC"
source "$BASHRC"

Then enter 'mojo' to start the Mojo REPL.

For tool help, enter 'mojo --help'.
For more docs, see https://docs.modular.com/mojo.

yuangezhizao@MacMini ~ % echo 'export MODULAR_HOME="/Users/yuangezhizao/.modular"' >> ~/.zshrc
yuangezhizao@MacMini ~ % echo 'export PATH="/Users/yuangezhizao/.modular/pkg/packages.modular.com_mojo/bin:$PATH"' >> ~/.zshrc
yuangezhizao@MacMini ~ % source ~/.zshrc

yuangezhizao@MacMini examples % mojo deviceinfo.mojo 
System information: 
    OS             :  macOS
    CPU            :  apple-m1
    Arch           :  arm64-apple-darwin23.4.0
    Physical Cores :  8
    Logical Cores  :  8
    CPU Features   :  neon Apple M1