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# Copyright 2016 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# This function will ascii encode unicode string inputs if neccesary.
# In Python3, unicode strings are the default str type.
cdef bytes str_to_bytes(object s):
if s is None or isinstance(s, bytes):
return s
elif isinstance(s, unicode):
return s.encode('ascii')
else:
raise TypeError('Expected bytes, str, or unicode, not {}'.format(type(s)))
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