在“第 3 章”和“创建第一个深度学习 Web 应用”中,我们看到了如何使用 Python 编写 Flask API,我们看到了如何在 Web 应用中使用该 API。 现在,我们知道 API 与语言库的区别以及使用 API的重要性。 我们熟悉一些顶尖组织提供的各种深度学习 API。 在接下来的章节中,我们将了解如何使用这些 API 来构建...
Format specifiers for types, padding, or aligning are specified after the colon character; for instance:f'{price:.3}', wherepriceis a variable name. Python string formatting The following example summarizes string formatting options in Python. main.py #!/usr/bin/python name = 'Peter' age = ...
Python f-string format width The width specifier sets the width of the value. The value may be filled with spacesorother charactersifthe valueisshorter than the specified width. format_width.py#!/usr/bin/pythonforxinrange(1, 11):print(f'{x:02} {x*x:3} {x*x*x:4}') The example ...
.ljust(width) # 获取固定长度,左对齐,右边不够用空格补齐 .rjust(width) # 获取固定长度,右对齐,左边不够用空格补齐 .center(width) # 获取固定长度,中间对齐,两边不够用空格补齐 .zfill(width) # 获取固定长度,右对齐,左边不足用0补 # 3 字符串搜索相关 .find()# 搜索指定字符串,没有返回-1.index()#...
Multi-line Docstrings also contain the same string literals line as in One-line Docstrings, but it is followed by a single blank along with the descriptive text. The general format for writing a Multi-line Docstring is as follows: def some_function(argument1): """Summary or Description of ...
Format specifiers in Python control how values appear when formatted, using components like fill, align, sign, width, and type. You align text in Python string formatting using the align component, which can justify text to the left, right, or center within a specified width.When...
>>> print(name.endswith('m')) #字符串是否以obj结束 True #replace,将字符串中的str1替换成str2,,可以指定替换次数 >>> msg = 'My name is Yim' >>> print(msg.replace('Yim','yim',1)) My name is yim #format,字符串格式化 >>> res = '{} {} {}'.format('Yim','25','male') ...
of readability. However, they don’t allow you to do lazy interpolation. There’s no way to use an f-string to create a reusable string template that you can interpolate later in your code. If you want a universal tool with all the features, then the.format()method is the way to go...
Assigning a string to a variable is done with the variable name followed by an equal sign and the string: Example a ="Hello" print(a) Try it Yourself » Multiline Strings You can assign a multiline string to a variable by using three quotes: ...
for i in range(1, 6): s = s + i print( s) # 这里的缩进和上一行不一致 如果不理解缩进,可以参考理解Python的代码缩进 - 知乎 (zhihu.com)。 2.NameError: name 'xxx' is not defined 某个变量没有定义就去使用它。 for i in range(1, 6): ...