Python Basics-ongoing updates

1. Module Import

Import xxx or from xxx import xxx, try to avoid using from XXX import *

2. Variables, constants

Local variables: can only be used within a function or within a class to assign values and change values

Global variables: Can be used in all functions or classes to assign values and change values

Constants: Determined values, cannot be assigned and change values

3. Data type

Integer: If 2

Floating point number: if 2.2

String: "abc"

Boolean value: True/false

List: [2,3,4]

Dictionary (dict): {"name": "Jack", "Age": "30"}

Null value: None

4. Process Control

If

For

While

Break: Jumps out of the current loop and exits the loop

Continue: Jump out of the current loop and proceed to the next loop

5. File reading and writing

Excel read-write module: XLRT, XLWT

XML read-write module:

6. Error handling

Try

Except

7. DateTime, TIME

DateTime formatting

String converted to DateTime

DateTime Conversion to String

8. Request

Python Basics-ongoing updates