python split at index code example

Example 1: python split at index

>>> list1 = ['a','b','c','d','e','f','g','h', 'i', 'j', 'k', 'l']
>>> print list1[:5]
['a', 'b', 'c', 'd', 'e']
>>> print list1[-7:]
['f', 'g', 'h', 'i', 'j', 'k', 'l']
# Note how you can slice either positively or negatively.
# When you use a negative number, it means we slice from right to left.

Example 2: python for loop index

presidents = ["Washington", "Adams", "Jefferson", "Madison", "Monroe", "Adams", "Jackson"]
for num, name in enumerate(presidents, start=1):
    print("President {}: {}".format(num, name))

Example 3: how to split string by list of indexes python

In [42]: s = "Hello there!"

In [43]: [s[v1:v2] for v1, v2 in zip([0]+l, l+[None])]
Out[43]: ['He', 'llo ', 'the', 're!']