python replace remove one tab from each line

Question

For example I've got a file with lines like this

\tline1\t
\t\tline2\t
\t\tline3
\tline4

I need to remove only first tab in the beginning of every string(and I don't care if there are more tabs in the line) So the result suppose to look like this

line1\t
\tline2\t
\tline3
line4

How to do it?

Johan · Accepted Answer · 2015-03-02 07:12:35Z

3

s = "\thello"
s.replace("\t", "", 1)

Unsure if it's needed but this will handle stuff like `"hello\tworld" also, i.e. replace the first tab in the string disregarding where in the string it is

answered Mar 2, 2015 at 7:12

Johan

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bereal · Accepted Answer · 2015-03-02 07:27:33Z

2

Regular expressions may help:

>>> import re
>>> pattern = re.compile('^\t')  # match a tab in the beginning of the line
>>> pattern.sub('', '\tline1\t')
'line1\t'
>>> pattern.sub('', '\t\tline2\t')
'\tline2\t'
>>> pattern.sub('', 'line3\t')
'line3\t'

answered Mar 2, 2015 at 7:27

bereal

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