Does Python uses Memory Pooling for Strings, Integers

Question

I have written simple Python code

#For String Types
d_new = dict(a_str="captainmarvel", b_str="captainmarvel", c_str="captainmarvel", d_str="captainmarvel")
print(id(d_new['a_str']))
p_str = "captainmarvel"
print(id(p_str))

#For int types
d = dict(a=4, b=4, c=4, d=4)
print(id(d['a']))
p = 4
print(id(p))

it returns output as

270985349584
270985349584
1559653536
1559653536

which are same object ids for integer value 4 and string value "captainmarvel". So does python reuses/pools its basic data types e.g. int, string

score 1 · Accepted Answer · answered Oct 12 '18 at 12:19

The CPython implementation occasionally does this for immutable objects, yes. (Other implementations like PyPy, Jython, IronPython, etc. might not.)

When exactly it does it is an implementation detail; most of the time you don't really need to bother with object identity.

Does Python uses Memory Pooling for Strings, Integers

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