python built-in function breakpoint and bytearray example details

breakpoint() function

breakpoint() is a new debugging tool in Python 3.7. It is a built-in function that inserts a breakpoint during program execution, allowing the program to stop there and wait for further commands from the debugger. Callingbreakpoint()function triggers the Python interpreter to pause execution and enter debugger mode at the call location, at which point you can examine the state of the program, check the values of variables, single-step through the program, and so on. Using thebreakpoint()function can replace older debugging methods, such as using theimport pdb; pdb.set_trace()Or insert in the codeprint()statements for debugging. It makes debugging code easier, more readable, and more consistent with the style of Python code.

For example, the following code usesbreakpoint()function inserts a breakpoint:

def func(a, b):
    c = a + b
    breakpoint()  # Insert a breakpoint here
    return c

result = func(2, 3)
print(result)

When the program execution reaches thebreakpoint()When it does, it pauses and enters debugger mode at the call location, where you can enter commands to check the values of variables, execute code, or debug the program further. When debugging is complete, you can enter the commandcontinueLet the program continue.

bytearray() function

bytearray()function returns a new array of bytes.bytearrayA class is a variable sequence containing a range of0 <= x < 256The integers of thebytearrayThe syntax is as follows:

class bytearray([source[, encoding[, errors]]])

• source: can be a string, an integer, an iterable object, or an object that follows the buffer interface; different types will have different effects.
• encodingcap (a poem)errorsDang.sourcemust be specified if it is a string.encodingparameters.bytearray()know how to use()method to convert strings to bytes.

For example, the followingbytearray()Some examples of the use of the function:

print(bytearray())  # Create an empty bytearray
print(bytearray("python", encoding='utf-8'))  # Create bytearray using strings
print(bytearray(4))  # Create a bytearray of length 4, padded with null bytes
print(bytearray([1, 2, 3]))  # Create bytearray using list of integers

bytearrayObjects support in-place modification, addition and deletion of elements, and are well suited for scenarios that deal with byte data, such as file processing, network communication, and data parsing.

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