[New-bugs-announce] [issue38016] Results with re.sub and re.replace is giving different results

[Mallinath Akkalkot]

New submission from Mallinath Akkalkot <mallinathva at gmail.com>:

Issue is explained in the attached presentation for the below python script.

# PYTHON script
import re

stringPassed = "START, 0.272342208623734, 0.122712611838329\nCIRCL, 0.2739, 0.1175, 0.2644, 0.1175\nCIRCL, 0.2644, 0.108, 0.2644, 0.1175\nLINE, 0.26237716818855, 0.108\nCIRCL, 0.2564, 0.102522934456486, 0.26237716818855, 0.102\nLINE, 0.255041919210401, 0.087\nLINE, 0.255041919210401, 0.072\nCIRCL, 0.239541747114243, -0.0106446715786942, 0.0269671265080016, 0.0720000000000296\nCIRCL, 0.2391, -0.0130000000000008, 0.2456, -0.0130000000000008\nLINE, 0.2391, -0.0350000000000008\nCIRCL, 0.243376868486329, -0.0411080018232587, 0.2456, -0.0350000000000008\nLINE, 0.24865951460066, -0.0430307277670375\nCIRCL, 0.255041919210401, -0.0521457461886608, 0.245341919210401, -0.0521457461886608\nLINE, 0.255041919210401, -0.087\nLINE, 0.2564, -0.102522934456486\nCIRCL, 0.26237716818855, -0.108, 0.26237716818855, -0.102\nLINE, 0.2644, -0.108\nCIRCL, 0.2739, -0.1175, 0.2644, -0.1175\nCIRCL, 0.272342208623734, -0.122712611838329, 0.2644, -0.1175\n"

retVal = re.findall(r"(\w+,\s+)(-\d+\.\d+)|(\d+\.\d+)", stringPassed, re.MULTILINE)

floatNumbersList = []		# List conatins all Folat numbers
for each in retVal:
	for each in each:
		if each != "":floatNumbersList.append(each)

newStringUpdated = stringPassed
for eachVal in floatNumbersList:
	newVal =  str(float(eachVal)*1000)
	retVals = re.sub(eachVal, newVal, newStringUpdated)
#	retVals = newStringUpdated.replace(eachVal, newVal)
	newStringUpdated = retVals

print(newStringUpdated)

----------
components: Regular Expressions
files: Bug_Description_Regular Expression.pptx
messages: 351066
nosy: Mallinath Akkalkot, ezio.melotti, mrabarnett
priority: normal
severity: normal
status: open
title: Results with re.sub and re.replace is giving different results
type: behavior
versions: Python 3.7
Added file: https://bugs.python.org/file48584/Bug_Description_Regular Expression.pptx

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38016>
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