python prepend code example

Example 1: prepend pyhton list

# option 1
s.insert(0, x)

# option 2
new_list = [x] + your_list

Example 2: python append to first index

In [1]: ls = [1,2,3]

In [2]: ls.insert(0, "new")

In [3]: ls
Out[3]: ['new', 1, 2, 3]