The float() function in Python is used to convert a value into a floating point number, which is a number with a decimal point. For example, float(3) returns 3.0 and float(“5.5”) returns 5.5. You can also use float() with numbers that are too large or too small for Python to represent as integers, such as 1.82e310 or -32.54e100. Here are some examples of using float() in Python: # Example 1: Convert an integer to a float x = 25 y = float(x) print(y) # Output: 25.0 # Example 2: Convert a string to a float s = "12.34" z = float(s) print(z) # Output: 12.34 # Example 3: Convert an infinity value to a float inf = "infinity" w = float(inf) print(w) # Output: inf If you have any questions about this code, you can drop a line in comment .
The Python encode() method is a string method that returns an encoded version of the given string using a specified encoding. Encoding is the process of converting a string into a sequence of bytes that can be stored or transmitted. If no encoding is specified, UTF-8 will be used by default. Here are some examples of using the encode() method in Python: To encode a string using UTF-8 encoding: title = "Python Programming" x = title.encode() print(x) Output: b'Python Programming' To encode a string using ASCII encoding and ignore any errors: str = "Hello World!" x = str.encode("ascii", "ignore") print(x) Output: b'Hello World!' To encode a string using base64 encoding: str = "Hello World!" x = str.encode("base64") print(x) Output: b'SGVsbG8gV29ybGQh\n' To encode a string containing non-ASCII characters using ISO 8859-1 encoding: str = "HËLLO" encode = str.encode("iso8859_1") pri...
Python getattr() is a built-in function that returns the value of a named attribute of an object. It can also take a default value as an optional argument, which is returned if the attribute does not exist. Here are some examples of how to use Python getattr() : To get the value of an existing attribute of an object: class Person: name = "John" age = 36 country = "Norway" person = Person() print(getattr(person, "name")) # returns "John" print(getattr(person, "age")) # returns 36 To get the value of a non-existing attribute of an object with a default value: class Person: name = "John" age = 36 country = "Norway" person = Person() print(getattr(person, "city", "Unknown")) # returns "Unknown" To implement a custom getattr() method for an object that dynamically computes attribute values: class Square: def __init__(self, side): ...
It is better to use dict.get(‘key’) than dict[‘key’] when accessing values in a dictionary in Python. This is because dict.get(‘key’) returns None if the key does not exist, while dict[‘key’] raises a KeyError exception. Most Python developers are in a habit of using square brackets when accessing an element from a data structure like Dictionaries. There is no issue with square brackets but when it comes to a value that doesn’t exit it shows an ugly error. Now, to save yourself from that error you can use get method. data_dict = {a:1, b:2,c:3} print(data_dict['d']) # KeyError: 'd' print(data_dict.get('d')) # None If you have any questions about this code, you can drop a line in comment .
The exec() function in Python is used to execute a dynamically generated code, which is a code that is created or modified at runtime. The exec() function takes a string or an object that contains a valid Python code and executes it as if it was written in a file. You can also pass a dictionary of global and local variables to the exec() function to modify the execution environment. Here are some examples of using exec() in Python: Execute a Python statement stored as a string: code = 'print("Hello, world!")' exec(code) Output: Hello, world! In this example, exec(code) executes the Python statement 'print("Hello, world!")', which prints the string "Hello, world!" to the console. Use exec() to execute a Python script stored in a file: with open('script.py', 'r') as file: code = file.read() exec(code) In this example, we open the file 'script.py', read its contents into a string, and then use exec() to execu...
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