Why did he return none?
Recursively forgot to write and return. When judging s [0] = "" , you should reutrn ltrim (s)
it is more convenient to replace spaces directly with re.sub
import re
text = "I am an handsome boy"
print(re.sub(r'\s+', '', text)) dict1 = { "system.cpu.user.pct": { "value": 12.83 }, "system.load.1": { "value": 0.33 } } dict2 = { "system": { "...
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