Mercurial > cpython-lru_cache-weakref

annotate Lib/tkinter/test/support.py @ 87690:66c1c9f32567 default tip

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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 204e66190dbb
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 import sys
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2 import tkinter
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3 import unittest
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4
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5 _tk_unavailable = None
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6
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7 def check_tk_availability():
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8 """Check that Tk is installed and available."""
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9 global _tk_unavailable
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10
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11 if _tk_unavailable is None:
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12 _tk_unavailable = False
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13 if sys.platform == 'darwin':
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14 # The Aqua Tk implementations on OS X can abort the process if
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15 # being called in an environment where a window server connection
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16 # cannot be made, for instance when invoked by a buildbot or ssh
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17 # process not running under the same user id as the current console
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18 # user. To avoid that, raise an exception if the window manager
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19 # connection is not available.
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20 from ctypes import cdll, c_int, pointer, Structure
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21 from ctypes.util import find_library
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22
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23 app_services = cdll.LoadLibrary(find_library("ApplicationServices"))
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24
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25 if app_services.CGMainDisplayID() == 0:
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26 _tk_unavailable = "cannot run without OS X window manager"
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27 else:
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28 class ProcessSerialNumber(Structure):
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29 _fields_ = [("highLongOfPSN", c_int),
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30 ("lowLongOfPSN", c_int)]
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31 psn = ProcessSerialNumber()
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32 psn_p = pointer(psn)
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33 if ( (app_services.GetCurrentProcess(psn_p) < 0) or
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34 (app_services.SetFrontProcess(psn_p) < 0) ):
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35 _tk_unavailable = "cannot run without OS X gui process"
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36 else: # not OS X
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37 import tkinter
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38 try:
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39 tkinter.Button()
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40 except tkinter.TclError as msg:
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41 # assuming tk is not available
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42 _tk_unavailable = "tk not available: %s" % msg
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43
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44 if _tk_unavailable:
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45 raise unittest.SkipTest(_tk_unavailable)
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46 return
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47
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48 def get_tk_root():
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49 check_tk_availability() # raise exception if tk unavailable
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50 try:
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51 root = tkinter._default_root
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52 except AttributeError:
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53 # it is possible to disable default root in Tkinter, although
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54 # I haven't seen people doing it (but apparently someone did it
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55 # here).
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56 root = None
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57
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58 if root is None:
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59 # create a new master only if there isn't one already
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60 root = tkinter.Tk()
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61
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62 return root
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63
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64 def root_deiconify():
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65 root = get_tk_root()
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66 root.deiconify()
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67
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68 def root_withdraw():
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69 root = get_tk_root()
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70 root.withdraw()
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71
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72
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73 def simulate_mouse_click(widget, x, y):
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74 """Generate proper events to click at the x, y position (tries to act
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75 like an X server)."""
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76 widget.event_generate('<Enter>', x=0, y=0)
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77 widget.event_generate('<Motion>', x=x, y=y)
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78 widget.event_generate('<ButtonPress-1>', x=x, y=y)
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79 widget.event_generate('<ButtonRelease-1>', x=x, y=y)
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80
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81
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82 import _tkinter
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83 tcl_version = tuple(map(int, _tkinter.TCL_VERSION.split('.')))
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84
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85 def requires_tcl(*version):
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86 return unittest.skipUnless(tcl_version >= version,
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87 'requires Tcl version >= ' + '.'.join(map(str, version)))
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88
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89 _tk_patchlevel = None
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90 def get_tk_patchlevel():
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91 global _tk_patchlevel
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92 if _tk_patchlevel is None:
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93 tcl = tkinter.Tcl()
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94 patchlevel = []
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95 for x in tcl.call('info', 'patchlevel').split('.'):
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96 try:
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97 x = int(x, 10)
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98 except ValueError:
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99 x = -1
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100 patchlevel.append(x)
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101 _tk_patchlevel = tuple(patchlevel)
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102 return _tk_patchlevel
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103
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104 units = {
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105 'c': 72 / 2.54, # centimeters
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106 'i': 72, # inches
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107 'm': 72 / 25.4, # millimeters
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108 'p': 1, # points
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109 }
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110
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111 def pixels_conv(value):
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112 return float(value[:-1]) * units[value[-1:]]
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113
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114 def tcl_obj_eq(actual, expected):
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115 if actual == expected:
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116 return True
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117 if isinstance(actual, _tkinter.Tcl_Obj):
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118 if isinstance(expected, str):
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119 return str(actual) == expected
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120 if isinstance(actual, tuple):
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121 if isinstance(expected, tuple):
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Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
122 return (len(actual) == len(expected) and
92e268f2719e Issue #19085: Added basic tests for all tkinter widget options.
Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
123 all(tcl_obj_eq(act, exp)
92e268f2719e Issue #19085: Added basic tests for all tkinter widget options.
Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
124 for act, exp in zip(actual, expected)))
92e268f2719e Issue #19085: Added basic tests for all tkinter widget options.
Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
125 return False
92e268f2719e Issue #19085: Added basic tests for all tkinter widget options.
Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
126
92e268f2719e Issue #19085: Added basic tests for all tkinter widget options.
Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
127 def widget_eq(actual, expected):
92e268f2719e Issue #19085: Added basic tests for all tkinter widget options.
Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
128 if actual == expected:
92e268f2719e Issue #19085: Added basic tests for all tkinter widget options.
Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
129 return True
92e268f2719e Issue #19085: Added basic tests for all tkinter widget options.
Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
130 if isinstance(actual, (str, tkinter.Widget)):
92e268f2719e Issue #19085: Added basic tests for all tkinter widget options.
Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
131 if isinstance(expected, (str, tkinter.Widget)):
92e268f2719e Issue #19085: Added basic tests for all tkinter widget options.
Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
132 return str(actual) == str(expected)
92e268f2719e Issue #19085: Added basic tests for all tkinter widget options.
Serhiy Storchaka <storchaka@gmail.com>
parents: 71242
diff changeset
133 return False