iterators and generators

Author: imashwini09

Iterators_and_Generators/lecture_1.py

@@ -0,0 +1,15 @@
+# it is an object that allows you traverse from element of collection one at a time
+# __iter__() return object of iterator
+# __next__()
+
+arr = [1,2,3,4,5]
+iterator = iter(arr)
+
+print(next(iterator))
+print(next(iterator))
+
+
+for i in iterator:
+    print(i)
+
+    

Iterators_and_Generators/lecture_2.py

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+class my_iterator:
+
+    def __init__(self,start,end):
+        self.start = start
+        self.end = end
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        if self.start <= self.end:
+            temp = self.start
+            self.start += 1
+            return temp
+        else:
+            raise StopIteration
+
+ite = my_iterator(1,5)
+print(next(ite))
+for i in ite:
+    print(i)

Iterators_and_Generators/lecture_3.py

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+# Generators
+
+
+def my_generator():
+    for i in range(500000):
+        yield i
+
+gen = my_generator()
+print(next(gen))
+print(next(gen))
+print(next(gen))

Iterators_and_Generators/lecture_4.py

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+def fib_generator():
+    a,b = 0,1
+    while True:
+        yield a
+        a,b  = b, a+b
+
+gen = fib_generator()
+
+for _ in range(10):
+    print(next(gen))
+
+for _ in range(10):
+    print(next(gen))

Iterators_and_Generators/lecture_5.py

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+class my_iterator:
+
+    def __init__(self,start,end):
+        self.start = start
+        self.end = end
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        if self.start <= self.end:
+            temp = self.start
+            self.start += 1
+            return temp
+        else:
+            raise StopIteration
+
+    def __reset__(self):
+        self.start = 1
+
+ite = my_iterator(1,5)
+print(next(ite))
+ite.__reset__()
+
+for i in ite:
+    print(i)