Mercurial > cpython-lru_cache-weakref

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents 4990fa0baa8b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 This package will install Python $FULL_VERSION for Mac OS X
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2 $MACOSX_DEPLOYMENT_TARGET for the following architecture(s):
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3 $ARCHITECTURES.
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5 **** IMPORTANT ****
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6
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7 Installing on OS X 10.8 (Mountain Lion) or later systems
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8 ========================================================
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9
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10 If you are attempting to install on an OS X 10.8+ system, you may
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11 see a message that Python can't be installed because it is from an
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12 unidentified developer. This is because this Python installer
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13 package is not yet compatible with the Gatekeeper security feature
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14 introduced in OS X 10.8. To allow Python to be installed, you
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15 can override the Gatekeeper policy for this install. In the Finder,
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16 instead of double-clicking, control-click or right click the "Python"
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17 installer package icon. Then select "Open using ... Installer" from
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18 the contextual menu that appears.
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19
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20 **** IMPORTANT ****
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21
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22 Update your version of Tcl/Tk to use IDLE or other Tk applications
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23 ==================================================================
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24
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25 To use IDLE or other programs that use the Tkinter graphical user
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26 interface toolkit, you may need to install a newer third-party version
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27 of the Tcl/Tk frameworks. Visit http://www.python.org/download/mac/tcltk/
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28 for current information about supported and recommended versions of
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29 Tcl/Tk for this version of Python and of Mac OS X.
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30
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31 **NEW* As of Python 3.4.0b1:
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32
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33 New Installation Options and Defaults
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34 =====================================
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35
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36 The Python installer now includes an option to automatically install
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37 or upgrade pip, a tool for installing and managing Python packages.
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38 This option is enabled by default and no Internet access is required.
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39 If you do not want the installer to do this, select the "Customize"
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40 option at the "Installation Type" step and uncheck the "Install or
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41 ugprade pip" option.
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42
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43 To make it easier to use scripts installed by third-party Python
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44 packages, with pip or by other means, the "Shell profile updater"
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45 option is now enabled by default, as has been the case with Python
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46 2.7.x installers. You can also turn this option off by selecting
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47 "Customize" and unchecking the "Shell profile updater" option. You
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48 can also update your shell profile later by launching the "Update
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49 Shell Profile" command found in the /Applications/Python $VERSION
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50 folder. You may need to start a new terminal window for the
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51 changes to take effect.
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52
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53 Python.org Python $VERSION and 2.7.x versions can both be installed and
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54 will not conflict. Command names for Python 3 contain a 3 in them,
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55 python3 (or python$VERSION), idle3 (or idle$VERSION), pip3 (or pip$VERSION), etc.
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56 Python 2.7 command names contain a 2 or no digit: python2 (or
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57 python2.7 or python), idle2 (or idle2.7 or idle), etc. If you want to
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58 use pip with Python 2.7.x, you will need to download and install a
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59 separate copy of it from the Python Package Index
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60 (https://pypi.python.org/pypi).
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61
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62 Using this version of Python on OS X
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63 ====================================
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64
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65 Python consists of the Python programming language interpreter, plus
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66 a set of programs to allow easy access to it for Mac users including
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67 an integrated development environment, IDLE, plus a set of pre-built
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68 extension modules that open up specific Macintosh technologies to
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69 Python programs.
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70
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71 The installer puts applications, an "Update Shell Profile" command,
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72 and a link to the optionally installed Python Documentation into the
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73 "Python $VERSION" subfolder of the system Applications folder,
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74 and puts the underlying machinery into the folder
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75 $PYTHONFRAMEWORKINSTALLDIR. It can
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76 optionally place links to the command-line tools in /usr/local/bin as
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77 well. Double-click on the "Update Shell Profile" command to add the
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78 "bin" directory inside the framework to your shell's search path.
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79
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80 You must install onto your current boot disk, even though the
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81 installer may not enforce this, otherwise things will not work.
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82
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83 You can verify the integrity of the disk image file containing the
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84 installer package and this ReadMe file by comparing its md5 checksum
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85 and size with the values published on the release page linked at
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86 http://www.python.org/download/
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87
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88 Installation requires approximately $INSTALL_SIZE MB of disk space,
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89 ignore the message that it will take zero bytes.
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90
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91 More information on Python in general can be found at
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92 http://www.python.org.