finished book example

Author: m15kh

chap7_caseif_dic.py

@@ -0,0 +1,30 @@
+def sum1(a, b):
+    return a+b
+def sub(a, b):
+    return a - b
+
+def mul(a , b):
+    return a * b
+
+def divide(a , b):
+    return a/b
+
+func = [sum1, sub, mul, divide ]
+#method one
+operator = func[3]
+print(operator(1,2))
+#method two
+print(func[2](12,4))
+
+
+def dispatch_dict(operator, x ,y):
+    return {
+        'add': lambda: x + y,
+        'sub': lambda: x - y,
+        'mul': lambda: x * y,
+        'div': lambda: x / y,
+    }.get(operator, lambda : None)()
+
+print(dispatch_dict('mul', 2, 8))
+
+print(dispatch_dict('unknown', 2, 8))

chap7_dic_sorted.py

@@ -0,0 +1,4 @@
+xs = {'a': 4, 'c': 2, 'b': 3, 'd': 1}
+
+s = sorted(xs.items(), key=lambda x: x[0])
+print(s)

merge_dic.py

@@ -0,0 +1,13 @@
+xs = {'a': 1, 'b': 2}
+ys = {'b': 3, 'c': 4}
+
+# Merge xs and ys into zs using the dict() constructor
+zs = dict(xs, **ys)
+print(zs)  # Output: {'a': 1, 'b': 3, 'c': 4}
+
+xs1 = {'a': 1, 'b': 2}
+ys1 = {'b': 3, 'c': 4}
+
+# Merge xs and ys into zs using dictionary unpacking
+zs1 = {**xs1, **ys1}
+print(zs1)  # Output: {'a': 1, 'b': 3, 'c': 4}

nicer_debug.py

@@ -0,0 +1,5 @@
+from json import dumps  as du
+mapping = {'a': 23, 'c': 42, 'b': 0xc0ffee}
+print(mapping)
+x = du(mapping, indent=4, sort_keys=True)#True
+print(x)

test1.py

@@ -0,0 +1,31 @@
+
+
+
+
+from time import perf_counter
+from functools import wraps
+def dec(func):
+    @wraps (func)
+    def inner (*args, **kwargs):
+        #time before run a func
+        before = perf_counter()
+        value = func(*args, **kwargs)
+        #time after run a func
+        after = perf_counter()
+        pichidegi =  after - before
+        print (f"pichidegi zamani ", func.__name__, pichidegi)
+        return None
+    return inner
+l = [1, 3, 5, 6, 9]
+@dec
+def moraba_2(l):
+    print([x**2 for x in l])
+
+@dec
+def moraba_1(l):
+    print([x**2 for x in l])
+
+moraba_1(l)
+moraba_2(l)
+
+