Swapping 1 with 0 and 0 with 1 in a Pythonic way

Swapping 1 with 0 and 0 with 1 in a Pythonic way

You can swap 1 with 0 and 0 with 1 in a Pythonic way using a simple arithmetic operation with bitwise XOR (^). Here's how you can do it:

# Define a number, either 0 or 1 number = 1 # Swap 1 with 0 and 0 with 1 using XOR swapped_number = number ^ 1 # Print the swapped number print(swapped_number)

In this code, ^ is the bitwise XOR operator. When you XOR a number with 1, it toggles the least significant bit, effectively swapping 1 with 0 and 0 with 1. This method works because XORing any number with 1 will flip its least significant bit.

Here's what happens when you run the code with number initially set to 1:

  1. number is 1 (binary: 0b0001).
  2. number ^ 1 performs the XOR operation, flipping the least significant bit.
  3. swapped_number becomes 0 (binary: 0b0000).

So, swapped_number will be 0 if number is initially 1, and it will be 1 if number is initially 0. This is a Pythonic way to swap 1 with 0 and 0 with 1 without using conditional statements or temporary variables.

Examples

  1. Swap 1 with 0 and 0 with 1 in a Python List

    • Description: This query seeks to swap 1 with 0 and 0 with 1 in a Python list.
    • Code:
      my_list = [1, 0, 1, 0, 1] swapped_list = [1 if x == 0 else 0 for x in my_list] # Swap 0 with 1 and vice versa print(swapped_list) # Output: [0, 1, 0, 1, 0]

  2. Python Swap Binary Values in List

    • Description: This query explores swapping binary values (1 and 0) in a Python list.
    • Code:
      binary_list = [0, 1, 0, 1, 0] swapped = [1 if x == 0 else 0 for x in binary_list] # Swap 1 and 0 print(swapped) # Output: [1, 0, 1, 0, 1]

  3. Pythonic Way to Swap 1 and 0

    • Description: This query is about finding a Pythonic way to swap 1 and 0 in an iterable.
    • Code:
      import numpy as np arr = np.array([1, 0, 1, 1, 0, 0]) arr = 1 - arr # Subtraction with 1 to swap 0 and 1 print(arr) # Output: [0, 1, 0, 0, 1, 1]

  4. Invert 0 and 1 in Python List

    • Description: This query explores how to invert 0 and 1 in a Python list.
    • Code:
      values = [0, 1, 1, 0, 1, 0] inverted = list(map(lambda x: 1 if x == 0 else 0, values)) # Invert 0 and 1 print(inverted) # Output: [1, 0, 0, 1, 0, 1]

  5. Python Swap Boolean Values

    • Description: This query looks into swapping boolean values where True becomes False and vice versa.
    • Code:
      bool_list = [True, False, True, True, False] swapped = [not x for x in bool_list] # Swap `True` with `False` and vice versa print(swapped) # Output: [False, True, False, False, True]

  6. Python Swap 1s and 0s in Array

    • Description: This query explores swapping 1s and 0s in a Python array.
    • Code:
      import numpy as np arr = np.array([1, 1, 0, 0, 1]) arr[arr == 1] = 0 arr[arr == 0] = 1 print(arr) # Output: [1, 1, 0, 0, 1] - Issue: same array because it changes all to 1 or 0 # Correct approach to swap arr = np.array([1, 1, 0, 0, 1]) arr = 1 - arr # Swaps 1s and 0s print(arr) # Output: [0, 0, 1, 1, 0]

  7. Swap Boolean Values in Python

    • Description: This query looks at swapping boolean values in a Python list or array.
    • Code:
      bool_list = [True, False, True, False] swapped_bool_list = [not x for x in bool_list] # Swap True and False print(swapped_bool_list) # Output: [False, True, False, True]

  8. Swap 1 with 0 and 0 with 1 in Python List Comprehension

    • Description: This query explores swapping 1 with 0 and 0 with 1 using Python list comprehension.
    • Code:
      original_list = [0, 1, 1, 0, 0] swapped_list = [1 if x == 0 else 0 for x in original_list] # Using list comprehension to swap 0 and 1 print(swapped_list) # Output: [1, 0, 0, 1, 1]

  9. Python Swap Values in List

    • Description: This query seeks to swap specific values in a list, focusing on swapping 1 with 0.
    • Code:
      my_list = [1, 0, 0, 1, 1] swapped = list(map(lambda x: 0 if x == 1 else 1, my_list)) # Swap using `map` print(swapped) # Output: [0, 1, 1, 0, 0]

  10. Invert 0 and 1 in Pythonic Way

    • Description: This query explores a Pythonic method to invert 0s and 1s.
    • Code:
      data = [1, 1, 0, 1, 0] inverted_data = [0 if x == 1 else 1 for x in data] # Pythonic inversion of 0s and 1s print(inverted_data) # Output: [0, 0, 1, 0, 1]

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