python替换的函数

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str = ‘good good study, day day up’ # good good study, day day up赋值给str

print(str.replace(‘good’,’bad’)) # 用replace语句把bad替换good

print(str) # 打印str

print(str.replace(‘day’,”)) # 用replace语句把”替换’day

结果：
bad bad study, day day up
good good study, day day up
good good study, up

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