split()
str1 = '我爱你,你爱我,我不爱他,他不爱我'
result = str1.split('爱')
print(result)
join()
list1 = ['王菲','卡扎菲','咖啡','刘亦菲','双飞']
result = '★'.join(list1)
print(result)
replace()
str1 = '今天晚上有饭局,今天晚上有好梦,今天晚上有作业,今天晚上不睡觉!'
result = str1.replace('今天','today')
print(result)
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