How do you replace the inverted commas for the following output and insert commas between the values as shown below using python regular expression

Question

I am using the following code below

y = bin(25)[2:]
y = [y]
tuple(y)
print y

The output here is ['11001'] and I am looking for the output [1,1,0,0,1] using regular expression so as to automate the plotting a square wave for the generated binary values from decimal numbers.Could any help me out.

Answer 1

You dont need regex for such problems you can use map to map the int function on each element in your list :

>>> y = bin(25)[2:]
>>> y
'11001'
>>> map(int,y)
[1, 1, 0, 0, 1]

or just use a list comprehension :

>>> [int(i) for i in y]
[1, 1, 0, 0, 1]

Answer 2

from the python docs :

Convert an integer number to a binary string. The result is a valid Python expression. If x is not a Python int object, it has to define an index () method that returns an integer.

ie y is a string.

If you want to convert it to an array of integers, you need to actualyl do that conversion yourself:

y = bin(25)[2:]
y = [int(yi) for yi in y]
print y # [1, 1, 0, 0, 1]