Just a minimal example of what I want to achieve.
I have an array:
array = [1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,....,1,2,3,4,5,6,7,8,9,10]
I would like to loop through this array and create a new array which looks like this:
new_array = [1,1,2,1,2,3,1,2,3,4,1,2,3,4,5,....,1,2,3,4,5,6,7,8,9,10]
i.e. loop through array a, get the first value (i.e. 1), then skip the remaining 9 values, then get the first and the second value (i.e. 1,2), then skip the remaining 8 values, and so on.
The idea I came up with was to create indices and use it in the following way:
In [1]: indices = np.arange(1,10,1)
Out[1]: array([1, 2, 3, 4, 5, 6, 7, 8, 9])
new_array = []
for i in array:
for a,b in zip(indices,range(10)):
new_array.append(i[0:a]) # here I am including i[0:1], i[0:2] and so on
So it loops through array and gets the first value, then skips the remaining 9 values, then gets the first two values and skips the remaining 8 values and so on.
But this doesn't seem to work. How can I achieve this ?
For a signle list you can also use list extension for this:
list = [1,2,3,4,5,6,7,8,9,10]
output = []
i = 1
while i <= 10:
output.extend(list[0:i])
i +=1
print output
For your list you can extend this to:
list = [1,2,3,4,5,6,7,8,9,10]*10
output = []
i = 1
j = 0
k = 1
while k <= 10:
output.extend(list[j:i])
j +=10
k +=1
i = j+k
print output