From c34208ae1f0017fb617bbe62cbaaeeeb16ccf7ba Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jure=20=C5=A0orn?= Date: Fri, 17 Dec 2021 07:24:00 +0100 Subject: [PATCH] Closure, Class, Pygame --- README.md | 11 +++++------ index.html | 15 +++++++-------- 2 files changed, 12 insertions(+), 14 deletions(-) diff --git a/README.md b/README.md index 442cd95..d61bca9 100644 --- a/README.md +++ b/README.md @@ -825,7 +825,7 @@ import . # Imports a built-in or '/.py'. Closure ------- -**We have a closure in Python when:** +**We have/get a closure in Python when:** * **A nested function references a value of its enclosing function and then** * **the enclosing function returns the nested function.** @@ -857,7 +857,7 @@ from functools import partial >>> multiply_by_3(10) 30 ``` -* **Partial is also useful in cases when function needs to be passed as an argument, because it enables us to set its arguments beforehand.** +* **Partial is also useful in cases when function needs to be passed as an argument because it enables us to set its arguments beforehand.** * **A few examples being: `'defaultdict()'`, `'iter(, to_exclusive)'` and dataclass's `'field(default_factory=)'`.** ### Non-Local @@ -968,8 +968,8 @@ class : print() print(f'{}') raise Exception() -loguru.logger.debug() csv.writer().writerow([]) +logging.warning() ``` #### Repr() use cases: @@ -977,7 +977,6 @@ csv.writer().writerow([]) print([]) print(f'{!r}') >>> -loguru.logger.exception() Z = dataclasses.make_dataclass('Z', ['a']); print(Z()) ``` @@ -1120,7 +1119,7 @@ class MyHashable: ### Sortable * **With total_ordering decorator, you only need to provide eq() and one of lt(), gt(), le() or ge() special methods and the rest will be automatically generated.** * **Functions sorted() and min() only require lt() method, while max() only requires gt(). However, it is best to define them all so that confusion doesn't arise in other contexts.** -* **When two lists, strings or dataclasses are compared, their values get compared in order until a pair of unequal values is found. The comparison of this two values is then returned. The shorter sequence is considered smaller in case of all elements being equal.** +* **When two lists, strings or dataclasses are compared, their values get compared in order until a pair of unequal values is found. The comparison of this two values is then returned. The shorter sequence is considered smaller in case of all values being equal.** ```python from functools import total_ordering @@ -3052,7 +3051,7 @@ def run(screen, images, mario, tiles): def update_speed(mario, tiles, pressed): x, y = mario.spd x += 2 * ((D.e in pressed) - (D.w in pressed)) - x -= x // abs(x) if x else 0 + x -= (x > 0) - (x < 0) y += 1 if D.s not in get_boundaries(mario.rect, tiles) else (D.n in pressed) * -10 mario.spd = P(*[max(-limit, min(limit, s)) for limit, s in zip(MAX_SPEED, P(x, y))]) diff --git a/index.html b/index.html index d49aa5f..0190917 100644 --- a/index.html +++ b/index.html @@ -50,7 +50,7 @@
- +
@@ -694,7 +694,7 @@ creature = Creature(point, direction)
  • On a filesystem this corresponds to a directory of Python files with an optional init script.
  • Running 'import <package>' does not automatically provide access to the package's modules unless they are explicitly imported in its init script.
    • -

    #Closure

    We have a closure in Python when:

      +

      #Closure

      We have/get a closure in Python when:

      • A nested function references a value of its enclosing function and then
      • the enclosing function returns the nested function.
      def get_multiplier(a):
@@ -723,7 +723,7 @@ creature = Creature(point, direction)
 30
        -
      • Partial is also useful in cases when function needs to be passed as an argument, because it enables us to set its arguments beforehand.
        • +
      • Partial is also useful in cases when function needs to be passed as an argument because it enables us to set its arguments beforehand.
      • A few examples being: 'defaultdict(<function>)', 'iter(<function>, to_exclusive)' and dataclass's 'field(default_factory=<function>)'.

      Non-Local

      If variable is being assigned to anywhere in the scope, it is regarded as a local variable, unless it is declared as a 'global' or a 'nonlocal'.

      def get_counter():
@@ -818,14 +818,13 @@ creature = Creature(point, direction)
 
      Str() use cases:
      print(<el>)
 print(f'{<el>}')
 raise Exception(<el>)
-loguru.logger.debug(<el>)
 csv.writer(<file>).writerow([<el>])
+logging.warning(<el>)
 
      
 
 
      Repr() use cases:
      print([<el>])
 print(f'{<el>!r}')
 >>> <el>
-loguru.logger.exception()
 Z = dataclasses.make_dataclass('Z', ['a']); print(Z(<el>))
 
      
 
@@ -943,7 +942,7 @@ Z = dataclasses.make_dataclass('Z', [
      Sortable
        
 
      • With total_ordering decorator, you only need to provide eq() and one of lt(), gt(), le() or ge() special methods and the rest will be automatically generated.
        • 
 
      • Functions sorted() and min() only require lt() method, while max() only requires gt(). However, it is best to define them all so that confusion doesn't arise in other contexts.
        • 
-
      • When two lists, strings or dataclasses are compared, their values get compared in order until a pair of unequal values is found. The comparison of this two values is then returned. The shorter sequence is considered smaller in case of all elements being equal.
        • 
+
      • When two lists, strings or dataclasses are compared, their values get compared in order until a pair of unequal values is found. The comparison of this two values is then returned. The shorter sequence is considered smaller in case of all values being equal.
        • 
 
      from functools import total_ordering
 
 @total_ordering
@@ -2472,7 +2471,7 @@ SIZE, MAX_SPEED = 50, P(def update_speed(mario, tiles, pressed):
     x, y = mario.spd
     x += 2 * ((D.e in pressed) - (D.w in pressed))
-    x -= x // abs(x) if x else 0
+    x -= (x > 0) - (x < 0)
     y += 1 if D.s not in get_boundaries(mario.rect, tiles) else (D.n in pressed) * -10
     mario.spd = P(*[max(-limit, min(limit, s)) for limit, s in zip(MAX_SPEED, P(x, y))])
 
@@ -2871,7 +2870,7 @@ $ pyinstaller script.py --add-data '<path>:.'