>>> eval('3+5') 8 >>> eval("'this is a test'") 'this is a test' >>> eval("['a', 'b', 'c']") ['a', 'b', 'c'] exec()执行存储在字符串或者文件中的Python语句语法:exec(object),object为字符串或者code对象。exec()能执行比eval()更复杂的ython语句 返回值:None,当执行的...
类型:Python变量的声明不需要类型,它的真实类型取决于关联的对象。 获取一个变量的类型用函数 type(name) 获取变量指向的内存地址 id(name) ==与is:==比较值是否相同,is比较的是地址是否相同 注意:int类型的【-5,256】已被Python缓存 4.获取某个字面量值的引用次数 import sys sys.getrefcount(20) 2 Python...
A namespace is basically a system to make sure that all the names in a program are unique and can be used without any conflict. You might already know that everything in Python—like strings, lists, functions, etc.—is an object. Another interesting fact is that Python implements namespaces...
Python >>>ord("é")233>>>hex(233)'0xe9'>>>"caf\u00e9"'café' The\uhhhhformat consists of precisely four hexadecimal digits and is applicable to16-bit Unicode characterswhose code points are no greater than about sixty-five thousand. This covers theBasic Multilingual Plane (BMP), which ...
For instance, the ASCII code for “K” is 75, the ASCII code of “o” is 111, and so on. We can confirm this by using the ord() function in Python: name = "Kodeclik" for i in name: print(ord(i)) The output is: 75 111 100 101 99 108 105 107 You can notice from the ...
What is Unicode? Unicode stands for universal character encoding. It is a standard for the binary coding of letters, numbers, and other characters and enables texts to be saved and processed in digital systems. What makes Unicode special (and innovative at the time it came out) is that it...
Your game is in its infancy, but you will probably want to add a series of levels, eventually. It's important to plan ahead when you program so your game can grow as you learn more about programming. Even though you don't even have one complete level yet, you should code as if you...
result += chr((ord(char) + shift_amount - case_offset) % 26 + case_offset) else: result += char return result plaintext = "Hello, this is a secret message!" shifted_text = caesar_cipher(plaintext, 3) print("Original:", plaintext) ...
Here's a fun project attempting to explain what exactly is happening under the hood for some counter-intuitive snippets and lesser-known features in Python.While some of the examples you see below may not be WTFs in the truest sense, but they'll reveal some of the interesting parts of ...
, "crazy!" >>> a is b True3.>>> 'a' * 20 is 'aaaaaaaaaaaaaaaaaaaa' True >>> 'a' * 21 is 'aaaaaaaaaaaaaaaaaaaaa' False很不可思议,对吧?💡 解释:上面这种特性是CPython的一种编译器优化技术(叫做字符串驻留技术)。就是如果将要创建的字符串在之前已经创建过并且驻留在了内存没有释放...