Garbage Collection-

Mechanism of requiring the memory by deleting the objects which are illegible for garbage collection.

• 1) If any object is not referenced by any live thread then that object will be illegible for GC(Garbage collection).
• 2) Illegible for GC doesn’t gives the 100% guarantee that the object will be deleted as soon as it is illegible for GC.
• 3) Local variable are also called temporary variable. Local variable will be automatically deleted as soon as function execution will complete as local variable scope is limited to its function only.
• 4) GC removes the self referenced object only when it reaches to thresh-hold number.
• 1) When memory is running low in that case We can ask GC to run forcefully.
• 5) collect() method (From gc module) can be called to execute GC forcefully to perform GC.

Ex-

import time, gc
class Test:
    def fun():
        x = []
        x.append(10)
        print(id(x))

class GCTest:
    def main():
        for i in range(5):
            Test.fun()
            gc.collect()
            time.sleep(1)
GCTest.main()

Output-
	2784965190344
	2784967004808
	2784967018184
	2784967041800
	2784967004808