Python字符串f-string使用大括号{}

f-string大括号外如果需要显示大括号，则应输入连续两个大括号 { { 和 }}：

name = 'Tom'

print(f'my name is {name}')
# my name is Tom

print(f'my name is {
     {
     {name}}}')
# my name is {Tom}