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https://github.com/wassname/catalyst.git
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Richard Frank
35 lines
1.0 KiB
Python
35 lines
1.0 KiB
Python
# Copyright 2016 Quantopian, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sqlite3
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import sqlalchemy as sa
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from six.moves import range
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from .input_validation import coerce_string
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SQLITE_MAX_VARIABLE_NUMBER = 998
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def group_into_chunks(items, chunk_size=SQLITE_MAX_VARIABLE_NUMBER):
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items = list(items)
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return [items[x:x+chunk_size]
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for x in range(0, len(items), chunk_size)]
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coerce_string_to_conn = coerce_string(sqlite3.connect)
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coerce_string_to_eng = coerce_string(
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lambda s: sa.create_engine('sqlite:///' + s)
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)
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