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9ae10d0 Oct 20, 2018
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class Python < Formula
desc "Interpreted, interactive, object-oriented programming language"
homepage ""
url ""
sha256 "0382996d1ee6aafe59763426cf0139ffebe36984474d0ec4126dd1c40a8b3549"
bottle do
rebuild 6
sha256 "f11e944b5909ef6b6e9f3f34a32e02e4f9feafebefab0c93574402cafe3c5358" => :mojave
sha256 "2f4d31189e2c1141ce60b2e102c4159e391f76fcaa76a02289f108ef88018f73" => :high_sierra
sha256 "1ced7c6d66651e459d2b1c176d023c7abfdea176c72168ebd7b0e0772193dc65" => :sierra
# setuptools remembers the build flags python is built with and uses them to
# build packages later. Xcode-only systems need different flags.
pour_bottle? do
reason <<~EOS
The bottle needs the Apple Command Line Tools to be installed.
You can install them, if desired, with:
xcode-select --install
satisfy { MacOS::CLT.installed? }
head do
url ""
resource "blurb" do
url ""
sha256 "1849eb2c9ceb74928d24eab847d344a8602e8ee822aeba2e930c4e6c7543e9e4"
option "with-tcl-tk", "Use Homebrew's Tk instead of macOS Tk (has optional Cocoa and threads support)"
deprecated_option "with-brewed-tk" => "with-tcl-tk"
depends_on "pkg-config" => :build
depends_on "sphinx-doc" => :build
depends_on "gdbm"
depends_on "openssl"
depends_on "readline"
depends_on "sqlite"
depends_on "xz"
depends_on "tcl-tk" => :optional
skip_clean "bin/pip3", "bin/pip-3.4", "bin/pip-3.5", "bin/pip-3.6", "bin/pip-3.7"
skip_clean "bin/easy_install3", "bin/easy_install-3.4", "bin/easy_install-3.5", "bin/easy_install-3.6", "bin/easy_install-3.7"
fails_with :clang do
build 425
cause ""
resource "setuptools" do
url ""
sha256 "acbc5740dd63f243f46c2b4b8e2c7fd92259c2ddb55a4115b16418a2ed371b15"
resource "pip" do
url ""
sha256 "a0e11645ee37c90b40c46d607070c4fd583e2cd46231b1c06e389c5e814eed76"
resource "wheel" do
url ""
sha256 "a26bc27230baaec9039972b7cb43db94b17c13e4d66a9ff6a4d46a0344c55c9a"
# Homebrew's tcl-tk is built in a standard unix fashion (due to link errors)
# so we have to stop python from searching for frameworks and linking against
# X11.
patch :DATA if build.with? "tcl-tk"
def install
# Unset these so that installing pip and setuptools puts them where we want
# and not into some other Python the user has installed.
xy = (buildpath/"").read.slice(/PYTHON_VERSION, (3\.\d)/, 1)
lib_cellar = prefix/"Frameworks/Python.framework/Versions/#{xy}/lib/python#{xy}"
args = %W[
args << "--without-gcc" if ENV.compiler == :clang
cflags = []
ldflags = []
cppflags = []
if MacOS.sdk_path_if_needed
# Help Python's build system (setuptools/pip) to build things on SDK-based systems
# The looks at "-isysroot" to get the sysroot (and not at --sysroot)
cflags << "-isysroot #{MacOS.sdk_path}"
ldflags << "-isysroot #{MacOS.sdk_path}"
if DevelopmentTools.clang_build_version < 1000
cflags << "-I/usr/include" # find zlib
# For the Xlib.h, Python needs this header dir with the system Tk
if build.without? "tcl-tk"
# Yep, this needs the absolute path where zlib needed
# a path relative to the SDK.
cflags << "-I#{MacOS.sdk_path}/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers"
# Avoid linking to libgcc
args << "MACOSX_DEPLOYMENT_TARGET=#{MacOS.version}"
# We want our readline! This is just to outsmart the detection code,
# superenv makes cc always find includes/libs!
inreplace "",
"do_readline = self.compiler.find_library_file(lib_dirs, 'readline')",
"do_readline = '#{Formula["readline"].opt_lib}/libhistory.dylib'"
inreplace "" do |s|
s.gsub! "sqlite_setup_debug = False", "sqlite_setup_debug = True"
s.gsub! "for d_ in inc_dirs + sqlite_inc_paths:",
"for d_ in ['#{Formula["sqlite"].opt_include}']:"
# Allow python modules to use ctypes.find_library to find homebrew's stuff
# even if homebrew is not a /usr/local/lib. Try this with:
# `brew install enchant && pip install pyenchant`
inreplace "./Lib/ctypes/macholib/" do |f|
if build.with? "tcl-tk"
tcl_tk = Formula["tcl-tk"].opt_prefix
cppflags << "-I#{tcl_tk}/include"
ldflags << "-L#{tcl_tk}/lib"
args << "CFLAGS=#{cflags.join(" ")}" unless cflags.empty?
args << "LDFLAGS=#{ldflags.join(" ")}" unless ldflags.empty?
args << "CPPFLAGS=#{cppflags.join(" ")}" unless cppflags.empty?
system "./configure", *args
system "make"
ENV.deparallelize do
# Tell Python not to install into /Applications (default for framework builds)
system "make", "install", "PYTHONAPPSDIR=#{prefix}"
system "make", "frameworkinstallextras", "PYTHONAPPSDIR=#{pkgshare}"
# Any .app get a " 3" attached, so it does not conflict with python 2.x.
Dir.glob("#{prefix}/*.app") { |app| mv app, app.sub(/\.app$/, "") }
# Prevent third-party packages from building against fragile Cellar paths
inreplace Dir[lib_cellar/"**/",
prefix, opt_prefix
# Help third-party packages find the Python framework
inreplace Dir[lib_cellar/"config*/Makefile"],
# Fix for
inreplace Dir[lib_cellar/"**/"],
%r{('LINKFORSHARED': .*?)'(Python.framework/Versions/3.\d+/Python)'}m,
# A fix, because python and python3 both want to install Python.framework
# and therefore we can't link both into HOMEBREW_PREFIX/Frameworks
["Headers", "Python", "Resources"].each { |f| rm(prefix/"Frameworks/Python.framework/#{f}") }
rm prefix/"Frameworks/Python.framework/Versions/Current"
# Symlink the pkgconfig files into HOMEBREW_PREFIX so they're accessible.
(lib/"pkgconfig").install_symlink Dir["#{frameworks}/Python.framework/Versions/#{xy}/lib/pkgconfig/*"]
# Remove the site-packages that Python created in its Cellar.
%w[setuptools pip wheel].each do |r|
(libexec/r).install resource(r)
cd "Doc" do
if build.head?
system bin/"python3", "-m", "venv", "./venv"
resource("blurb").stage do
system buildpath/"Doc/venv/bin/python3", "-m", "pip", "install", "-v",
"--no-deps", "--no-binary", ":all", "--ignore-installed", "."
system "make", "html"
doc.install Dir["build/html/*"]
# Install unversioned symlinks in libexec/bin.
"idle" => "idle3",
"pydoc" => "pydoc3",
"python" => "python3",
"python-config" => "python3-config",
}.each do |unversioned_name, versioned_name|
(libexec/"bin").install_symlink (bin/versioned_name).realpath => unversioned_name
def post_install
xy = (prefix/"Frameworks/Python.framework/Versions").children.min.basename.to_s
site_packages = HOMEBREW_PREFIX/"lib/python#{xy}/site-packages"
site_packages_cellar = prefix/"Frameworks/Python.framework/Versions/#{xy}/lib/python#{xy}/site-packages"
# Fix up the site-packages so that user-installed Python software survives
# minor updates, such as going from 3.3.2 to 3.3.3:
# Create a site-packages in HOMEBREW_PREFIX/lib/python#{xy}/site-packages
# Symlink the prefix site-packages into the cellar.
site_packages_cellar.unlink if site_packages_cellar.exist?
site_packages_cellar.parent.install_symlink site_packages
# Write our
rm_rf Dir["#{site_packages}/[co]"]
# Remove old setuptools installations that may still fly around and be
# listed in the easy_install.pth. This can break setuptools build with
# zipimport.ZipImportError: bad local file header
# setuptools-0.9.8-py3.3.egg
rm_rf Dir["#{site_packages}/setuptools*"]
rm_rf Dir["#{site_packages}/distribute*"]
rm_rf Dir["#{site_packages}/pip[-_.][0-9]*", "#{site_packages}/pip"]
%w[setuptools pip wheel].each do |pkg|
(libexec/pkg).cd do
system bin/"python3", "-s", "", "--no-user-cfg", "install",
"--force", "--verbose", "--install-scripts=#{bin}",
rm_rf [bin/"pip", bin/"easy_install"]
mv bin/"wheel", bin/"wheel3"
# Install unversioned symlinks in libexec/bin.
"easy_install" => "easy_install-#{xy}",
"pip" => "pip3",
"wheel" => "wheel3",
}.each do |unversioned_name, versioned_name|
(libexec/"bin").install_symlink (bin/versioned_name).realpath => unversioned_name
# post_install happens after link
%W[pip3 pip#{xy} easy_install-#{xy} wheel3].each do |e|
(HOMEBREW_PREFIX/"bin").install_symlink bin/e
# Help distutils find brewed stuff when building extensions
include_dirs = [HOMEBREW_PREFIX/"include", Formula["openssl"].opt_include,
library_dirs = [HOMEBREW_PREFIX/"lib", Formula["openssl"].opt_lib,
if build.with? "tcl-tk"
include_dirs << Formula["tcl-tk"].opt_include
library_dirs << Formula["tcl-tk"].opt_lib
cfg = prefix/"Frameworks/Python.framework/Versions/#{xy}/lib/python#{xy}/distutils/distutils.cfg"
cfg.atomic_write <<~EOS
include_dirs=#{include_dirs.join ":"}
library_dirs=#{library_dirs.join ":"}
def sitecustomize
xy = (prefix/"Frameworks/Python.framework/Versions").children.min.basename.to_s
# This file is created by Homebrew and is executed on each python startup.
# Don't print from here, or else python command line scripts may fail!
# <>
import re
import os
import sys
if sys.version_info[0] != 3:
# This can only happen if the user has set the PYTHONPATH for 3.x and run Python 2.x or vice versa.
# Every Python looks at the PYTHONPATH variable and we can't fix it here in,
# because the PYTHONPATH is evaluated after the Many modules (e.g. PyQt4) are
# built only for a specific version of Python and will fail with cryptic error messages.
# In the end this means: Don't set the PYTHONPATH permanently if you use different Python versions.
exit('Your PYTHONPATH points to a site-packages dir for Python 3.x but you are running Python ' +
str(sys.version_info[0]) + '.x!\\n PYTHONPATH is currently: "' + str(os.environ['PYTHONPATH']) + '"\\n' +
' You should `unset PYTHONPATH` to fix this.')
# Only do this for a brewed python:
if os.path.realpath(sys.executable).startswith('#{rack}'):
# Shuffle /Library site-packages to the end of sys.path
library_site = '/Library/Python/#{xy}/site-packages'
library_packages = [p for p in sys.path if p.startswith(library_site)]
sys.path = [p for p in sys.path if not p.startswith(library_site)]
# .pth files have already been processed so don't use addsitedir
# the Cellar site-packages is a symlink to the HOMEBREW_PREFIX
# site_packages; prefer the shorter paths
long_prefix = re.compile(r'#{rack}/[0-9\._abrc]+/Frameworks/Python\.framework/Versions/#{xy}/lib/python#{xy}/site-packages')
sys.path = [long_prefix.sub('#{HOMEBREW_PREFIX/"lib/python#{xy}/site-packages"}', p) for p in sys.path]
# Set the sys.executable to use the opt_prefix
sys.executable = '#{opt_bin}/python#{xy}'
def caveats
if prefix.exist?
xy = (prefix/"Frameworks/Python.framework/Versions").children.min.basename.to_s
xy = version.to_s.slice(/(3\.\d)/) || "3.7"
text = <<~EOS
Python has been installed as
Unversioned symlinks `python`, `python-config`, `pip` etc. pointing to
`python3`, `python3-config`, `pip3` etc., respectively, have been installed into
If you need Homebrew's Python 2.7 run
brew install python@2
Pip, setuptools, and wheel have been installed. To update them run
pip3 install --upgrade pip setuptools wheel
You can install Python packages with
pip3 install <package>
They will install into the site-package directory
# Tk warning only for 10.6
tk_caveats = <<~EOS
Apple's Tcl/Tk is not recommended for use with Python on Mac OS X 10.6.
For more information see:
text += tk_caveats unless MacOS.version >= :lion
test do
xy = (prefix/"Frameworks/Python.framework/Versions").children.min.basename.to_s
# Check if sqlite is ok, because we build with --enable-loadable-sqlite-extensions
# and it can occur that building sqlite silently fails if OSX's sqlite is used.
system "#{bin}/python#{xy}", "-c", "import sqlite3"
# Check if some other modules import. Then the linked libs are working.
system "#{bin}/python#{xy}", "-c", "import tkinter; root = tkinter.Tk()"
system "#{bin}/python#{xy}", "-c", "import _gdbm"
system bin/"pip3", "list", "--format=columns"
diff --git a/ b/
index 2779658..902d0eb 100644
--- a/
+++ b/
@@ -1699,9 +1699,6 @@ class PyBuildExt(build_ext):
# Rather than complicate the code below, detecting and building
# AquaTk is a separate method. Only one Tkinter will be built on
# Darwin - either AquaTk, if it is found, or X11 based Tk.
- if (host_platform == 'darwin' and
- self.detect_tkinter_darwin(inc_dirs, lib_dirs)):
- return
# Assume we haven't found any of the libraries or include files
# The versions with dots are used on Unix, and the versions without
@@ -1747,22 +1744,6 @@ class PyBuildExt(build_ext):
if dir not in include_dirs:
- # Check for various platform-specific directories
- if host_platform == 'sunos5':
- include_dirs.append('/usr/openwin/include')
- added_lib_dirs.append('/usr/openwin/lib')
- elif os.path.exists('/usr/X11R6/include'):
- include_dirs.append('/usr/X11R6/include')
- added_lib_dirs.append('/usr/X11R6/lib64')
- added_lib_dirs.append('/usr/X11R6/lib')
- elif os.path.exists('/usr/X11R5/include'):
- include_dirs.append('/usr/X11R5/include')
- added_lib_dirs.append('/usr/X11R5/lib')
- else:
- # Assume default location for X11
- include_dirs.append('/usr/X11/include')
- added_lib_dirs.append('/usr/X11/lib')
# If Cygwin, then verify that X is installed before proceeding
if host_platform == 'cygwin':
x11_inc = find_file('X11/Xlib.h', [], include_dirs)
@@ -1786,10 +1767,6 @@ class PyBuildExt(build_ext):
if host_platform in ['aix3', 'aix4']:
- # Finally, link with the X11 libraries (not appropriate on cygwin)
- if host_platform != "cygwin":
- libs.append('X11')
ext = Extension('_tkinter', ['_tkinter.c', 'tkappinit.c'],
define_macros=[('WITH_APPINIT', 1)] + defs,
include_dirs = include_dirs,