Python 3.9 introduces removeprefix and removesuffix

Python 3.9.0 has introduced two new methods to work with strings: removeprefix and removesuffix. As their names suggest, one is used to remove a prefix from a string while the other one is used to remove a suffix.

removeprefix

Given a string and a prefix, if the string begins with the prefix, the prefix is being removed, otherwise a copy of the original string is being returned:

In [5]: 'MyStringExample'.removeprefix('My')
Out[5]: 'StringExample'

In [6]: 'MyStringExample'.removeprefix('Foo')
Out[6]: 'MyStringExample'

removesuffix

Given a string and a suffix, if the string ends with the suffix, the suffix is being removed, otherwise a copy of the original string is being returned:

In [7]: 'ThisIsATest'.removesuffix('Test')
Out[7]: 'ThisIsA'

In [8]: 'ThisIsATest'.removesuffix('Foo')
Out[8]: 'ThisIsATest'

Of course these are not the only features which have been added to Python 3.9.0, so I may cover more in the next days. If in the mean time you have any preferences, please leave a comment below and thanks for reading.

References

• https://docs.python.org/3/library/stdtypes.html#str.removeprefix
• https://docs.python.org/3/library/stdtypes.html#str.removesuffix