CODEWITHSUNDEEP
pythonconverters
Joe Smith
Joe Smith

Reputation: 21

custom conversion program in python?

I would like to do something like as follows:

h=@ , e=( , l=& , o=!

So, in the above example, when you type hello, it gives back @(&&!, and vise versa.

(I would perfer it in Python, but it doesn't have to be.)

I would like to make a small utility of this sort. Can anyone help? Thanks!

EDIT: "Basically I would like to be able to assign some letters a unique character. Then, when you run the utility, it asks for your input. Then you type what you want in any order. Using the example above: "hello"="@(&&!" , "elloh"="(&&!@" , "looleh"="&!!&(@" and so forth."

Upvotes: 2

Views: 101

Answers (2)

unutbu
unutbu

Reputation: 879341

In Python2, you could use str.translate:

import string
table = string.maketrans(
    'helo',
    '@(&!',)

In [17]: 'hello'.translate(table)
Out[17]: '@(&&!'

In [18]: 'looleh'.translate(table)
Out[18]: '&!!&(@'

Or, you could use unicode.translate:

In [19]: table = {ord(k):v for k, v in zip(u'helo', u'@(&!')}

In [20]: u'hello'.translate(table)
Out[20]: u'@(&&!'

Lutz Horn's answer shows how you could build a single table which can perform both the forward and backward translation.

In Python3, string.maketrans has been replaced by bytes.maketrans:

>>> table = bytes.maketrans(b'helo', b'@(&!')
>>> b'hello'.translate(table)
b'@(&&!'

>>> 'hello'.translate({ord(k):v for k, v in zip('helo', '@(&!')})
'@(&&!'

Upvotes: 7

user1907906
user1907906

Reputation:

Use the existing small utility tr.

In the following example, every uneaven line (1, 3, 5, 7) is input, every even line (2, 4, 6, 8) is output.

$ tr 'helo@(&!' '@(&!helo'
hello
@(&&!
@(&&!
hello
stackoverflow
stack!v(rf&!w
stack!v(rf&!w
stackoverflow

Upvotes: 0

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