Python learning notes, python learning Manual

Python learning notes, python learning Manual

Start learning python!

Chapter1 Introducton

1. python Executable File: add a sentence # At the beginning #! /Usr/bin/python: grant the execution right, chmod u + x ***. py, and then you can directly execute the command. O (distinct _ distinct) O ~

2. the python string is non-mutable. Strings have many convenient operations: len (), [:], find, replace, split, upper, issalpha, rstrip

3. Pattern Matching: import re -- learn later

4. List: an ordered set of any type of objects. Operation: len, [], append, pop, insert. remove, nesting, list Parsing

5. dictionary: similar to c ++ map, the same dictionary key value and ing value in python can be of any type and can also be nested, a little powerful!

6. tuples: unchangeable list

7. file:

 

Chapter2 numbers

1. math module: contains the vast majority of c ++

2random Module

3. Other tools: decimal, fraction, etc.

4. Set