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How can I change the grouping of items in a list?

So, if I have a list like this:

x = [0,1,2,3,4,5,6,7,8,9]

How do I convert this list to something like this:

x = [01,23,45,67,89]

How can i do this?

I know about the inline function zip

, but I don't want tuple

and I want 2 numbers to be grouped into 1.

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3 answers


You can try this:



x = [0,1,2,3,4,5,6,7,8,9]

x = map(str, x)

new_list = map(int, [x[i]+x[i+1] for i in range(0, len(x)-1, 2)])
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Using the concepts of zip and list, assuming the datatype is converted from a list of int to a list of strings:



In [1]: x = [0,1,2,3,4,5,6,7,8,9]

In [2]: pairs = zip(x[::2], x[1::2])

In [3]: pairs
Out[3]: [(0, 1), (2, 3), (4, 5), (6, 7), (8, 9)]

In [4]: [str(fst) + str(snd) for fst, snd in pairs] 
Out[4]: ['01', '23', '45', '67', '89']
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It's much easier to understand and is one liner:

 # l = list of string of items in list u with index(i) and index(i+1) and i increments by 2
 l = [ str( u[i]) + str( u[i+1]) for i in range( 0, len(u), 2)]
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