New in version 2.7.
Tools for representing MongoDB regular expressions.
BSON regular expression data.
This class is useful to store and retrieve regular expressions that are incompatible with Python’s regular expression dialect.
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Convert a Python regular expression into a Regex instance.
Note that in Python 3, a regular expression compiled from a str has the re.UNICODE flag set. If it is undesirable to store this flag in a BSON regular expression, unset it first:
>>> pattern = re.compile('.*')
>>> regex = Regex.from_native(pattern)
>>> regex.flags ^= re.UNICODE
>>> db.collection.insert({'pattern': regex})
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Warning
Python regular expressions use a different syntax and different set of flags than MongoDB, which uses PCRE. A regular expression retrieved from the server may not compile in Python, or may match a different set of strings in Python than when used in a MongoDB query.
Compile this Regex as a Python regular expression.
Warning
Python regular expressions use a different syntax and different set of flags than MongoDB, which uses PCRE. A regular expression retrieved from the server may not compile in Python, or may match a different set of strings in Python than when used in a MongoDB query. try_compile() may raise re.error.