cpython/Mac/BuildScript/resources/ReadMe.rtf

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\f0\fs24 \cf0 This package will install Python $FULL_VERSION for Mac OS X $MACOSX_DEPLOYMENT_TARGET for the following architecture(s): $ARCHITECTURES.\
\
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\b \cf0 NOTE:
\b0   This is an early developer preview of the next feature release of Python 3.  Many features are yet to be added and existing features may change substantially or be deleted prior to the feature code freeze.\
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\b \cf0 \ul \ulc0 Certificate verification and OpenSSL\

\b0 \ulnone \
This variant of Python 3.7 includes its own private copy of OpenSSL 1.0.2.  The deprecated Apple-supplied OpenSSL libraries are no longer used.  This means that the trust certificates in system and user keychains managed by the 
\i Keychain Access 
\i0 application and the 
\i security
\i0  command line utility are no longer used as defaults by the Python 
\f1 ssl
\f0  module.  For this preview release, a sample command script is included in 
\f1 /Applications/Python 3.7
\f0  to install a curated bundle of default root certificates from the third-party 
\f1 certifi
\f0  package ({\field{\*\fldinst{HYPERLINK "https://pypi.python.org/pypi/certifi"}}{\fldrslt https://pypi.python.org/pypi/certifi}}).  If you choose to use 
\f1 certifi
\f0 , you should consider subscribing to the{\field{\*\fldinst{HYPERLINK "https://certifi.io/en/latest/"}}{\fldrslt  project's email update service}} to be notified when the certificate bundle is updated.\
\
The bundled 
\f1 pip
\f0  included with this installer has its own default certificate store for verifying download connections.\
\

\b \ul Update your version of Tcl/Tk to use IDLE or other Tk applications
\b0 \ulnone \
\
To use IDLE or other programs that use the Tkinter graphical user interface toolkit, you need to install a newer third-party version of the 
\i Tcl/Tk
\i0  frameworks.  Visit {\field{\*\fldinst{HYPERLINK "https://www.python.org/download/mac/tcltk/"}}{\fldrslt https://www.python.org/download/mac/tcltk/}} for current information about supported and recommended versions of 
\i Tcl/Tk
\i0  for this version of Python and of Mac OS X.  For this developer preview, the installer is still linked with Tcl/Tk 8.5.\

\b \ul \
Other changes\

\b0 \ulnone \
For other changes in this release, see the 
\i What's new
\i0  section in the {\field{\*\fldinst{HYPERLINK "https://www.python.org/doc/"}}{\fldrslt Documentation Set}} for this release and its 
\i Release Notes
\i0  link at {\field{\*\fldinst{HYPERLINK "https://www.python.org/downloads/"}}{\fldrslt https://www.python.org/downloads/}}.\

\b \ul \
Python 3 and Python 2 Co-existence\

\b0 \ulnone \
Python.org Python $VERSION and 2.7.x versions can both be installed on your system and will not conflict. Command names for Python 3 contain a 3 in them, 
\f1 python3
\f0  (or
\f1  python$VERSION
\f0 ), 
\f1 idle3
\f0  (or i
\f1 dle$VERSION
\f0 ), 
\f1 pip3
\f0  (or 
\f1 pip$VERSION
\f0 ), etc.  Python 2.7 command names contain a 2 or no digit: 
\f1 python2
\f0  (or 
\f1 python2.7
\f0  or 
\f1 python
\f0 ), 
\f1 idle2
\f0  (or 
\f1 idle2.7
\f0  or 
\f1 idle
\f0 ), etc.\
}