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+---
+title: hamming_distance
+tags: math,intermediate
+---
+
+Calculates the Hamming distance between two values.
+
+- Use the XOR operator (`^`) to find the bit difference between the two numbers.
+- Use `bin()` to convert the result to a binary string.
+- Convert the string to a list and use `list.count()` to count and return the number of `1`s in it.
+
+```py
+def hamming_distance(a, b):
+  return list(bin(a ^ b)).count('1')
+```
+
+```py
+hamming_distance(2, 3) # 1
+```