Explain to me why the result of the following calculation is different:
Python:
tmp = 4235635936 << 0 #4235635936
JS
let tmp = 4235635936 << 0 // -59331360
Question - how do I get the same result in python as in js ?
The binary representation for both numbers is the same. One is signed, the other is unsigned.
>>> struct.pack("<i", -59331360)
b'\xe0\xacv\xfc'
>>> struct.pack("<I", 4235635936)
b'\xe0\xacv\xfc'
>>>
in JS, the bitwise operators and shift operators operate on 32-bit ints, and your example overflows the 32-bit capacity.
In Python there's no capacity limit for integers, so you get the actual value.