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https://issues.apache.org/jira/browse/BEAM-7018?focusedWorklogId=280420&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-280420
]
ASF GitHub Bot logged work on BEAM-7018:
----------------------------------------
Author: ASF GitHub Bot
Created on: 22/Jul/19 14:15
Start Date: 22/Jul/19 14:15
Worklog Time Spent: 10m
Work Description: robertwb commented on pull request #8859: [BEAM-7018]
Added Regex transform for PythonSDK
URL: https://github.com/apache/beam/pull/8859#discussion_r305841301
##########
File path: sdks/python/apache_beam/transforms/util.py
##########
@@ -864,3 +867,223 @@ def add_window_info(element,
timestamp=DoFn.TimestampParam,
def expand(self, pcoll):
return pcoll | ParDo(self.add_window_info)
+
+
+class Regex(object):
+ """
+ PTransform to use Regular Expression to process the elements in a
+ PCollection.
+ """
+ @staticmethod
+ def _regex_compile(regex):
+ """Return re.compile if the regex has a string value"""
+ if isinstance(regex, str):
+ regex = re.compile(regex)
+ return regex
+
+ @staticmethod
+ @typehints.with_input_types(str)
+ @typehints.with_output_types(str)
+ @ptransform_fn
+ def matches(pcoll, regex, group=0):
+ """
+ Returns the matches if the element matched the Regex. Returns the
+ entire line (group 0 by default). Group can be integer value or a string
Review comment:
returns the entire matched string. (line doesn't really make sense in this
context, unless you're talking about the entire element, in which case this is
false).
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Issue Time Tracking
-------------------
Worklog Id: (was: 280420)
Time Spent: 7h 50m (was: 7h 40m)
> Regex transform for Python SDK
> ------------------------------
>
> Key: BEAM-7018
> URL: https://issues.apache.org/jira/browse/BEAM-7018
> Project: Beam
> Issue Type: New Feature
> Components: sdk-py-core
> Reporter: Rose Nguyen
> Assignee: Shehzaad Nakhoda
> Priority: Minor
> Time Spent: 7h 50m
> Remaining Estimate: 0h
>
> PTransorms to use Regular Expressions to process elements in a PCollection
> It should offer the same API as its Java counterpart:
> [https://github.com/apache/beam/blob/11a977b8b26eff2274d706541127c19dc93131a2/sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/Regex.java]
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