What is the python entry code?

defnot_empty:

Returns and len(s .strip())>；) >; 0

#returnsands. Strip ()

# If you write S directly. Strip () Then if s is None, an error will be reported, because None has no strip method.

# If s is None, then any value of None and is False, and directly returns false.

# If s is not None, determine s.. Whether trip () is empty.

In this way, the filter can filter out values such as "none" and "and".

Look at it in two parts. The first part is to sort the length. Equivalent to range(5), and his result is. 0 1234。 The second part is the specific sorting rules. The sorting rule is to sort by the value of nums. If it is not declared, reverse is the default ascending order. It is a range(5) array, sorted by the values of nums(0 to 4), and returned according to this result.

Language features:

Simplicity: Python is a language that represents simple ideas. Reading a good Python program is just like reading English. It allows you to focus on solving problems instead of understanding the language itself.

Easy to learn: Python is very easy to use because its documentation is very simple.

Easy to read and maintain: clear and unified style, forced indentation.

Wide range of uses:

Speed: The bottom layer of Python is written in C language, and many standard libraries and third-party libraries are also written in C, which runs very fast.