本文整理汇总了Python中lib2to3.pgen2.driver.load_grammar方法的典型用法代码示例。如果您正苦于以下问题：Python driver.load_grammar方法的具体用法？Python driver.load_grammar怎么用？Python driver.load_grammar使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类lib2to3.pgen2.driver的用法示例。
在下文中一共展示了driver.load_grammar方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_load_grammar_from_pickle
# 需要导入模块: from lib2to3.pgen2 import driver [as 别名]
# 或者: from lib2to3.pgen2.driver import load_grammar [as 别名]
def test_load_grammar_from_pickle(self):
# Make a copy of the grammar file in a temp directory we are
# guaranteed to be able to write to.
tmpdir = tempfile.mkdtemp()
try:
grammar_copy = os.path.join(
tmpdir, os.path.basename(support.grammar_path))
shutil.copy(support.grammar_path, grammar_copy)
pickle_name = pgen2_driver._generate_pickle_name(grammar_copy)
pgen2_driver.load_grammar(grammar_copy, save=True, force=True)
self.assertTrue(os.path.exists(pickle_name))
os.unlink(grammar_copy) # Only the pickle remains...
pgen2_driver.load_grammar(grammar_copy, save=False, force=False)
finally:
shutil.rmtree(tmpdir) 示例2: test_load_grammar_from_txt_file
# 需要导入模块: from lib2to3.pgen2 import driver [as 别名]
# 或者: from lib2to3.pgen2.driver import load_grammar [as 别名]
def test_load_grammar_from_txt_file(self):
pgen2_driver.load_grammar(support.grammar_path, save=False, force=True) 示例3: test_load_grammar_from_subprocess
# 需要导入模块: from lib2to3.pgen2 import driver [as 别名]
# 或者: from lib2to3.pgen2.driver import load_grammar [as 别名]
def test_load_grammar_from_subprocess(self):
tmpdir = tempfile.mkdtemp()
tmpsubdir = os.path.join(tmpdir, 'subdir')
try:
os.mkdir(tmpsubdir)
grammar_base = os.path.basename(support.grammar_path)
grammar_copy = os.path.join(tmpdir, grammar_base)
grammar_sub_copy = os.path.join(tmpsubdir, grammar_base)
shutil.copy(support.grammar_path, grammar_copy)
shutil.copy(support.grammar_path, grammar_sub_copy)
pickle_name = pgen2_driver._generate_pickle_name(grammar_copy)
pickle_sub_name = pgen2_driver._generate_pickle_name(
grammar_sub_copy)
self.assertNotEqual(pickle_name, pickle_sub_name)
# Generate a pickle file from this process.
pgen2_driver.load_grammar(grammar_copy, save=True, force=True)
self.assertTrue(os.path.exists(pickle_name))
# Generate a new pickle file in a subprocess with a most likely
# different hash randomization seed.
sub_env = dict(os.environ)
sub_env['PYTHONHASHSEED'] = 'random'
subprocess.check_call(
[sys.executable, '-c', """
from lib2to3.pgen2 import driver as pgen2_driver
pgen2_driver.load_grammar(%r, save=True, force=True)
""" % (grammar_sub_copy,)],
env=sub_env)
self.assertTrue(os.path.exists(pickle_sub_name))
with open(pickle_name, 'rb') as pickle_f_1, \
open(pickle_sub_name, 'rb') as pickle_f_2:
self.assertEqual(
pickle_f_1.read(), pickle_f_2.read(),
msg='Grammar caches generated using different hash seeds'
' were not identical.')
finally:
shutil.rmtree(tmpdir)