def windex(lst):
'''an attempt to make a random.choose() function that makes weighted choices
accepts a list of tuples with the item and probability as a pair
like: >>> x = [('one', 0.25), ('two', 0.25), ('three', 0.5)]
>>> y=windex(x)'''
n = random.uniform(0, 1)
for item, weight in lst:
if n < weight:
break
n = n - weight
return item
python类choose()的实例源码
def __init__(self, *args, **kw):
self.package_name = 'PACKAGE_'
while self.package_name in sys.modules:
self.package_name += random.choose(string.ascii_letters)
self.module_name = self.package_name + '.foo'
unittest.TestCase.__init__(self, *args, **kw)
def test_package_import__semantics(self):
# Generate a couple of broken modules to try importing.
# ...try loading the module when there's a SyntaxError
self.rewrite_file('for')
try: __import__(self.module_name)
except SyntaxError: pass
else: raise RuntimeError('Failed to induce SyntaxError') # self.fail()?
self.assertNotIn(self.module_name, sys.modules)
self.assertFalse(hasattr(sys.modules[self.package_name], 'foo'))
# ...make up a variable name that isn't bound in __builtins__
var = 'a'
while var in dir(__builtins__):
var += random.choose(string.ascii_letters)
# ...make a module that just contains that
self.rewrite_file(var)
try: __import__(self.module_name)
except NameError: pass
else: raise RuntimeError('Failed to induce NameError.')
# ...now change the module so that the NameError doesn't
# happen
self.rewrite_file('%s = 1' % var)
module = __import__(self.module_name).foo
self.assertEqual(getattr(module, var), 1)
def __init__(self, *args, **kw):
self.package_name = 'PACKAGE_'
while self.package_name in sys.modules:
self.package_name += random.choose(string.letters)
self.module_name = self.package_name + '.foo'
unittest.TestCase.__init__(self, *args, **kw)
def test_package_import__semantics(self):
# Generate a couple of broken modules to try importing.
# ...try loading the module when there's a SyntaxError
self.rewrite_file('for')
try: __import__(self.module_name)
except SyntaxError: pass
else: raise RuntimeError, 'Failed to induce SyntaxError'
self.assertNotIn(self.module_name, sys.modules)
self.assertFalse(hasattr(sys.modules[self.package_name], 'foo'))
# ...make up a variable name that isn't bound in __builtins__
var = 'a'
while var in dir(__builtins__):
var += random.choose(string.letters)
# ...make a module that just contains that
self.rewrite_file(var)
try: __import__(self.module_name)
except NameError: pass
else: raise RuntimeError, 'Failed to induce NameError.'
# ...now change the module so that the NameError doesn't
# happen
self.rewrite_file('%s = 1' % var)
module = __import__(self.module_name).foo
self.assertEqual(getattr(module, var), 1)
def __init__(self, *args, **kw):
self.package_name = 'PACKAGE_'
while self.package_name in sys.modules:
self.package_name += random.choose(string.letters)
self.module_name = self.package_name + '.foo'
unittest.TestCase.__init__(self, *args, **kw)
def test_package_import__semantics(self):
# Generate a couple of broken modules to try importing.
# ...try loading the module when there's a SyntaxError
self.rewrite_file('for')
try: __import__(self.module_name)
except SyntaxError: pass
else: raise RuntimeError, 'Failed to induce SyntaxError'
self.assertNotIn(self.module_name, sys.modules)
self.assertFalse(hasattr(sys.modules[self.package_name], 'foo'))
# ...make up a variable name that isn't bound in __builtins__
var = 'a'
while var in dir(__builtins__):
var += random.choose(string.letters)
# ...make a module that just contains that
self.rewrite_file(var)
try: __import__(self.module_name)
except NameError: pass
else: raise RuntimeError, 'Failed to induce NameError.'
# ...now change the module so that the NameError doesn't
# happen
self.rewrite_file('%s = 1' % var)
module = __import__(self.module_name).foo
self.assertEqual(getattr(module, var), 1)
def __init__(self, *args, **kw):
self.package_name = 'PACKAGE_'
while self.package_name in sys.modules:
self.package_name += random.choose(string.ascii_letters)
self.module_name = self.package_name + '.foo'
unittest.TestCase.__init__(self, *args, **kw)
def test_package_import__semantics(self):
# Generate a couple of broken modules to try importing.
# ...try loading the module when there's a SyntaxError
self.rewrite_file('for')
try: __import__(self.module_name)
except SyntaxError: pass
else: raise RuntimeError('Failed to induce SyntaxError') # self.fail()?
self.assertNotIn(self.module_name, sys.modules)
self.assertFalse(hasattr(sys.modules[self.package_name], 'foo'))
# ...make up a variable name that isn't bound in __builtins__
var = 'a'
while var in dir(__builtins__):
var += random.choose(string.ascii_letters)
# ...make a module that just contains that
self.rewrite_file(var)
try: __import__(self.module_name)
except NameError: pass
else: raise RuntimeError('Failed to induce NameError.')
# ...now change the module so that the NameError doesn't
# happen
self.rewrite_file('%s = 1' % var)
module = __import__(self.module_name).foo
self.assertEqual(getattr(module, var), 1)
def __init__(self, *args, **kw):
self.package_name = 'PACKAGE_'
while self.package_name in sys.modules:
self.package_name += random.choose(string.letters)
self.module_name = self.package_name + '.foo'
unittest.TestCase.__init__(self, *args, **kw)
def test_package_import__semantics(self):
# Generate a couple of broken modules to try importing.
# ...try loading the module when there's a SyntaxError
self.rewrite_file('for')
try: __import__(self.module_name)
except SyntaxError: pass
else: raise RuntimeError, 'Failed to induce SyntaxError'
self.assertNotIn(self.module_name, sys.modules)
self.assertFalse(hasattr(sys.modules[self.package_name], 'foo'))
# ...make up a variable name that isn't bound in __builtins__
var = 'a'
while var in dir(__builtins__):
var += random.choose(string.letters)
# ...make a module that just contains that
self.rewrite_file(var)
try: __import__(self.module_name)
except NameError: pass
else: raise RuntimeError, 'Failed to induce NameError.'
# ...now change the module so that the NameError doesn't
# happen
self.rewrite_file('%s = 1' % var)
module = __import__(self.module_name).foo
self.assertEqual(getattr(module, var), 1)
def __init__(self, *args, **kw):
self.package_name = 'PACKAGE_'
while self.package_name in sys.modules:
self.package_name += random.choose(string.ascii_letters)
self.module_name = self.package_name + '.foo'
unittest.TestCase.__init__(self, *args, **kw)
def test_package_import__semantics(self):
# Generate a couple of broken modules to try importing.
# ...try loading the module when there's a SyntaxError
self.rewrite_file('for')
try: __import__(self.module_name)
except SyntaxError: pass
else: raise RuntimeError('Failed to induce SyntaxError') # self.fail()?
self.assertNotIn(self.module_name, sys.modules)
self.assertFalse(hasattr(sys.modules[self.package_name], 'foo'))
# ...make up a variable name that isn't bound in __builtins__
var = 'a'
while var in dir(__builtins__):
var += random.choose(string.ascii_letters)
# ...make a module that just contains that
self.rewrite_file(var)
try: __import__(self.module_name)
except NameError: pass
else: raise RuntimeError('Failed to induce NameError.')
# ...now change the module so that the NameError doesn't
# happen
self.rewrite_file('%s = 1' % var)
module = __import__(self.module_name).foo
self.assertEqual(getattr(module, var), 1)
def __init__(self, *args, **kw):
self.package_name = 'PACKAGE_'
while self.package_name in sys.modules:
self.package_name += random.choose(string.letters)
self.module_name = self.package_name + '.foo'
unittest.TestCase.__init__(self, *args, **kw)
def test_package_import__semantics(self):
# Generate a couple of broken modules to try importing.
# ...try loading the module when there's a SyntaxError
self.rewrite_file('for')
try: __import__(self.module_name)
except SyntaxError: pass
else: raise RuntimeError, 'Failed to induce SyntaxError'
self.assertNotIn(self.module_name, sys.modules)
self.assertFalse(hasattr(sys.modules[self.package_name], 'foo'))
# ...make up a variable name that isn't bound in __builtins__
var = 'a'
while var in dir(__builtins__):
var += random.choose(string.letters)
# ...make a module that just contains that
self.rewrite_file(var)
try: __import__(self.module_name)
except NameError: pass
else: raise RuntimeError, 'Failed to induce NameError.'
# ...now change the module so that the NameError doesn't
# happen
self.rewrite_file('%s = 1' % var)
module = __import__(self.module_name).foo
self.assertEqual(getattr(module, var), 1)
def __init__(self, *args, **kw):
self.package_name = 'PACKAGE_'
while self.package_name in sys.modules:
self.package_name += random.choose(string.ascii_letters)
self.module_name = self.package_name + '.foo'
unittest.TestCase.__init__(self, *args, **kw)
def test_package_import__semantics(self):
# Generate a couple of broken modules to try importing.
# ...try loading the module when there's a SyntaxError
self.rewrite_file('for')
try: __import__(self.module_name)
except SyntaxError: pass
else: raise RuntimeError('Failed to induce SyntaxError') # self.fail()?
self.assertNotIn(self.module_name, sys.modules)
self.assertFalse(hasattr(sys.modules[self.package_name], 'foo'))
# ...make up a variable name that isn't bound in __builtins__
var = 'a'
while var in dir(__builtins__):
var += random.choose(string.ascii_letters)
# ...make a module that just contains that
self.rewrite_file(var)
try: __import__(self.module_name)
except NameError: pass
else: raise RuntimeError('Failed to induce NameError.')
# ...now change the module so that the NameError doesn't
# happen
self.rewrite_file('%s = 1' % var)
module = __import__(self.module_name).foo
self.assertEqual(getattr(module, var), 1)
