Replace a substring in a string with null in python

Question

I have a string as

a='''123
456
789'''

I want to replace 456 with something similar to a null value, so that the corresponding output is

123
789

The objective is to eliminate the empty line that would be generated as a result of

a=a.replace('456','')

An empty string is different than the value of null, which python does not have — OneCricketeer
– OneCricketeer, Commented Nov 4, 2016 at 5:39

Moinuddin Quadri · Accepted Answer · 2016-11-04 05:42:45Z

4

You are getting empty line after doing replace because '456' is followed by '\n'. In order to remove empty line, replace '456\n' with '' as:

>>> a = a.replace('456\n', '')
>>> print(a)
123
789

where initially a is holding the multiline string mentioned in the question as:

>>> a='''123
    456
    789'''

answered Nov 4, 2016 at 5:42

Moinuddin Quadri

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