Getting Started with Python

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Python is an object-oriented, interpreted computer programming language, invented by Dutchman Guido van Rossum in 1989, and the first public release was released in 1991.

Python has a rich and powerful library. It is often nicknamed the glue language and is able to easily connect a variety of modules made in other languages, especially in C + +.

Below I am a few of my beginner's knowledge points:

The most distinctive feature of 0:python is the use of indentation to represent blocks of code, without the use of curly braces {}.

1. Variables: No need to define keywords, such as x=10;

2. Notes: A single-line comment in Python begins with # , multiple lines of comments can be in several # numbers, and "and" " :

3.print The default output is line-wrapping, if you want to implement no line-wrapping need to add end= ""at the end of the variable:

4. Standard data type:

There are six standard data types in the Python3:

• Number (numeric)
• String (String)
• List (lists)
• Tuple (tuple)
• Sets (collection)
• Dictionary (dictionary)

Among the six standard data types of Python3:

• immutable Data (four): Number (numeric), string (string), tuple (tuple), sets (set);
• variable data (two): List, Dictionary (dictionary).

5. Variable Assignment:

A=b=c=1 indicates that three variables are assigned the same value

a,b=1,2 indicates that A and B are assigned values of 1 and 2 respectively.

6. Two methods of judging data types:

Type () does not consider a subclass to be a type of parent class

Isinstance () is considered a subclass of a type of parent class

7,string type slices:

Print (Str[ind,ind,step])-----ind refers to the corresponding subscript, step

8, condition control

If elif Else

9, loop

(1) While  judging condition:     code block
(2) for X in range (A, B)

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Getting Started with Python