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python [2020/05/09 16:56] – adminpython [2021/05/06 11:15] (current) – admin
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-### Data Format+## Data Type
  
-- Integer +^ Example                                       ^ Data Type  ^ 
-- List +| x = "Hello World"                             | str        | 
-- String https://www.w3schools.com/python/python_ref_string.asp+| x = 20                                        | int        | 
 +| x = 20.5                                      | float      | 
 +| x = 1j                                        | complex    | 
 +| x = ["apple", "banana", "cherry"]             | list       | 
 +| x = ("apple", "banana", "cherry")             | tuple      | 
 +| x = range(6)                                  | range      | 
 +| x = {"name" : "John", "age" : 36}             | dict       | 
 +| x = {"apple", "banana", "cherry"}             | set        | 
 +| x = frozenset({"apple", "banana", "cherry"})  | frozenset  | 
 +| x = True                                      | bool       | 
 +| x = b"Hello"                                  | bytes      | 
 +| x = bytearray(5)                              | bytearray  | 
 +| x = memoryview(bytes(5))                      |            | 
 + 
 +ref: https://medium.com/@shawnren527/learn-about-python-3-data-types-numbers-and-strings-76c75a917c9b
  
 ### Class ### Class
 ref:https://www.w3schools.com/python/python_classes.asp ref:https://www.w3schools.com/python/python_classes.asp
  
-### Create a list of objects from a class+## Create a list of objects from a class
 ```python ```python
    swatchList = []    swatchList = []
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 </wrap> </wrap>
  
-### Format Variables+## Format Variables
 ```python ```python
    print('%s %.2f' % ("hue =",swSky1.hue))    print('%s %.2f' % ("hue =",swSky1.hue))
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-### Plot (matplotlib)+## Plot (matplotlib)
 py37-matplotlib has the following notes:\\ py37-matplotlib has the following notes:\\
 The default backend is the interactive Mac OS X backend. Different backends can be specified using the The default backend is the interactive Mac OS X backend. Different backends can be specified using the
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 Note: ```markerfacecolor``` accept RGB, HEX and simple color text description: ```markerfacecolor=(r,g,b)```, ```markerfacecolor='#333399'```, ``` markerfacecolor='green'``` Note: ```markerfacecolor``` accept RGB, HEX and simple color text description: ```markerfacecolor=(r,g,b)```, ```markerfacecolor='#333399'```, ``` markerfacecolor='green'```
  
-### Common Error+### 3D plot: 
 +https://jakevdp.github.io/PythonDataScienceHandbook/04.12-three-dimensional-plotting.html 
 + 
 +## Common Error
 ```python ```python
     File "main.py", line 15     File "main.py", line 15
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