Update README.md
Edits for PEP8 consistency: variable casing/underlining, spacing after parameter commas.
Added method for obtaining char value.
@@ -112,7 +112,7 @@ picodisplay.set_pen(r,g,b)
Creates a pen which can be stored as a variable for faster re-use of the same colour through calls to `set_pen`. The values for `r`, `g` and `b` should be from 0-255 inclusive.
```python
-penColour = picodisplay.create_pen(r,g,b)
+pen_colour = picodisplay.create_pen(r, g, b)
picodisplay.set_pen(penColour)
```
@@ -161,8 +161,9 @@ picodisplay.rectangle(x,y,w,h)
Draws a single character to the display buffer in the current pen colour. The `c` parameter should be the ASCII numerical representation of the character to be printed, `x` and `y` describe the top-left corner of the character's drawing field. The `character` function can also be given an optional 4th parameter, `scale`, describing the scale of the character to be drawn. Default value is 2.
```python
-picodisplay.character(c,x,y)
-picodisplay.character(c,x,y,scale)
+char_a = ord('a')
+picodisplay.character(char_a, x, y)
+picodisplay.character(char_a, x, y, scale)
```
### text
