CODEWITHSUNDEEP
pythonregexlist
abhixec
abhixec

Reputation: 177

How to convert a list of items into variables in python?

I have a list of items in python something like this: input:

a=['nt','mt','pt']

I want to make each item in the above list as a variable and then assign that variable to a regex involving that variable.

output: I want something like this:

nt=re.compile("%s=[a-z]+&" %nt)
mt=re.compile("%s=[a-z]+&" %mt)
pt=re.compile("%s=[a-z]+&" %pt)

how do i go about doing this ??? Thanks. [sorry didn't pose the question in the best way possible ]

Upvotes: 3

Views: 6656

Answers (2)

joe
joe

Reputation: 817

Unquestionably best to use dictionary keys, not variables. But FYI in Python variables are actually stored in a dictionary anyway, which you can access by calling vars() or locals(). That means it is possible to create variables dynamically just by assigning to this dictionary, e.g.:

>>> new_var_name = 'my_var'
>>> vars()[new_var_name] = "I'm your new variable!"
>>> print my_var
"I'm your new variable!"

To be honest I don't know how tampering with vars() could ever be justifiable. But it's interesting, at least. Anyway, use Sven Marnach's answer.

Upvotes: 0

Sven Marnach
Sven Marnach

Reputation: 601679

Keep data out of your variable names. Don't use variables, use a dictionary:

d = {name: re.compile("%s=[a-z]+&" % name) for name in a}

Upvotes: 15

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