string.lstrip() with leading '3's

[ClaytonBingham]

BPO	39880

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2020-03-06.21:53:00.192>
created_at = <Date 2020-03-06.21:14:18.058>
labels = ['invalid']
title = "string.lstrip() with leading '3's"
updated_at = <Date 2020-03-06.21:53:00.191>
user = 'https://bugs.python.org/ClaytonBingham'

bugs.python.org fields:

activity = <Date 2020-03-06.21:53:00.191>
actor = 'steven.daprano'
assignee = 'none'
closed = True
closed_date = <Date 2020-03-06.21:53:00.192>
closer = 'steven.daprano'
components = []
creation = <Date 2020-03-06.21:14:18.058>
creator = 'Clayton Bingham'
dependencies = []
files = []
hgrepos = []
issue_num = 39880
keywords = []
message_count = 2.0
messages = ['363555', '363558']
nosy_count = 2.0
nosy_names = ['lkollar', 'Clayton Bingham']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue39880'
versions = ['Python 3.6']

[ClaytonBingham]

Code to reproduce the behavior:

string = 'h.pt3dadd(3333.994527806812,7310.741605031661,-152.492,0.2815384615384615,sec=sectionList[1396])\n'
print(string.lstrip('h.pt3dadd(').split(','))

The lstrip method removed 'h.pt3dadd(' but also removes the 3's before the first decimal in the remaining string.

[lkollar]

The argument in lstrip() is a set of characters which are stripped from the string and not a full substring. As the documentation states: "The chars argument is not a prefix; rather, all combinations of its values are stripped" See https://docs.python.org/3/library/stdtypes.html#str.lstrip.