如何从字符串文字构建字符串对象？

Question

看到这个。

A string is a Python object representing a text value. It can be built from a string literal, or it could be read from a file, or it could originate from many other sources.

我真的没看懂，怎么能从一个字符串字面量中构建出一个字符串对象呢？

'''
multiline
content
'''

另外，上面的字符串字面量是怎么来的？请帮助我理解字符串文字和字符串对象之间的区别？

Answer 1

请参阅 Literals 上的 python 文档：

Literals are notations for constant values of some built-in types.

字符串文字是存在于源代码中的东西 - 它是一种写入字符串值的方式。字符串对象是 str 对象在内存中的表示。您可以将其与整数文字进行比较，例如 5:

x = 5  # x is assigned an integer value, using the literal `5`
y = x + x  # x is assigned a value
# Both are `int` objects
print(isinstance(x, int))  # True
print(isinstance(x, int))  # True

foo = "hello"  # foo is assigned a str value, using the literal `"hello"`
bar = foo.upper()   # bar is assigned a `str` value
# Both are `str` objects
print(isinstance(foo, str))  # True
print(isinstance(bar, str))  # True

如果需要，您可以做一些 further reading：

In computer science, a literal is a notation for representing a fixed value in source code. ... Literals are often used to initialize variables, ...

如何从字符串文字构建字符串对象？

How can a string object be built from a string literal?

python

string

object

string-literals