Python 字符串格式化

Question

Python 3.8.10

result = "<svg id='{id}' class='{class}' height='{height}{unit}' width='{width}{unit}'>".format(id=image_id, class=html_class, height=str(height), unit=unit_of_measure)

我收到此错误消息：

 File "/home/michael/PycharmProjects/images_outer/images_project/images/templatetags/images.py", line 131
    result = "<svg id='{id}' class='{class}' height='{height}{unit}' width='{width}{unit}'>".format(id=image_id, class=html_class, height=str(height), unit=str(unit_of_measure))
                                                                                                                 ^
SyntaxError: invalid syntax
python-BaseException

Process finished with exit code 130 (interrupted by signal 2: SIGINT)

你能帮帮我吗？

Answer 1

如果你正在使用 python 3.x 你可以使用 f strings

result = f"<svg id='{id}' class='{class}' height='{height}{unit}' width='{width}{unit}'>"

Answer 2

class 是 python 中的内置关键字，因此不能在此上下文中使用。代替 str.format() 使用替代的“f-string”语法来格式化字符串，例如：

result = f"<svg id='{image_id}' class='{html_class}' height='{height}{unit_of_measure}' width='{width}{unit_of_measure}'>"

Python 字符串格式化

Python str formatting

python

python-3.x

python-3.8