asher asher - 2 months ago 6
Python Question

How to make a list of lists in Python?

Assume,

range(len(column)) = 4
column = ['AAA', 'CTC', 'GTC', 'TTC']
for i in range(len(column)):
a = list(column[i])


Outside of this loop I want a variable,say x to be assigned such that it gives the following output.

['A', 'A', 'A']
['C', 'T', 'C']
['G', 'T', 'C']
['T', 'T', 'C']





After doing this, here is what I should be able to do:
In the Next, I want to compare within x. Say x[2] to tell me if 'G' is different from 'T' and if 'G' is different from 'C' and if 'T' is different from 'C'

Answer

I believe you are in need of a list of lists

Code:

column = ['AAA', 'CTC', 'GTC', 'TTC']
x=[]
for i in range(len(column)):
    a = list(column[i])
    x.append(a)

print x

Output:

[['A', 'A', 'A'], ['C', 'T', 'C'], ['G', 'T', 'C'], ['T', 'T', 'C']]