Can any one explain for me how lexicographically (alphabetical order)

Question

alphabetical order ? how that look a like

Answer 1

In python, do something like this (sort(*, key=None, reverse=None))

Example for alphabetical list could be like this
sorted(sorted(s), key=str.upper)

It's also possible with lambda as such

text='aAaBbcCdE'
sorted(text,key=lambda x:(str.lower(x),x))

But this is deprecated, slow and not recomended

To learn more about sorting you can look here https://docs.python.org/3.6/howto/sorting.html
I'm just assuming you are using python 3.

Answer 2

try the following code to understand it in simple way

print("abc" >="efg")
print("pqr">="efg")

as ABC is the beginning of the alphabetical series we get first statement result as false and second statement result as true