05-字符串「少儿编程一对一教学」
原创2023年1月5日大约 3 分钟...约 831 字
字符串定义
字符串为什么会有三种创建方法
- 单双引号混用:
s = "I'm lilei."
print(s)
- 多种引号混用,支持多行文本,原样输出:
s = """During a keynote speech at PyCon US 2022, Anaconda’s CEO Peter Wang unveiled quite a surprising project — PyScript. It is a JavaScript framework that allows users to create Python applications in the browser using a mix of Python and standard HTML. The project’s ultimate goal is to allow a much wider audience (for example, front-end developers) to benefit from the power of Python and its various libraries (statistical, ML/DL, etc.).
The key thilss''''''ngs to know about PyScript
Allows us to use Python and its vast ecosystem of libraries (including numpy, pandas, scikit-learn) from within the browser.
By using environment management users can decide which packages and files are available when running the page’s code."""
print(s)
查看字符串长度
s = """During a keynote speech at PyCon US 2022, Anaconda’s CEO Peter Wang unveiled quite a surprising project — PyScript. It is a JavaScript framework that allows users to create Python applications in the browser using a mix of Python and standard HTML. The project’s ultimate goal is to allow a much wider audience (for example, front-end developers) to benefit from the power of Python and its various libraries (statistical, ML/DL, etc.).
The key thilss''''''ngs to know about PyScript
Allows us to use Python and its vast ecosystem of libraries (including numpy, pandas, scikit-learn) from within the browser.
By using environment management users can decide which packages and files are available when running the page’s code."""
print(len(s))
字符串的数据提取
提取单个字符
s = "Hello AIYC"
print(s[0])
select = s[0]
print(select)
输出:
H
H
提取多个字符
s = "Hello AIYC"
print(s[1:3])
select = s[1:3]
print(select)
输出:
el
el
提取有间隔/切片的数据
s = "1234567890"
print(s[0:len(s):2])
print(s[0:len(s):2])
输出:
13579
倒序
s = "1234567890"
print(s[::-1])
输出:
0987654321
s[::-1]
前面两个省略了什么数据?
评价
- 状态很不错;
- 对于之前的知识比较牢固;「比如网站启动的命令等」
- 关于电脑的问题:有可能是系统升级导致的,最近苹果新系统比较不稳定,当然可以升级,以后升级系统后,可以检查一下编程环境噢。这样咱可以提前解决啦。
- 多用变量的思维想问题;
- 利用编程解放劳动力量呀~
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方法一:QQ
方法二:微信:Jiabcdefh
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