1.1
course="Python Programming"
score=95.5
sentence=f"{course}课程的成绩是{score}分"
print(sentence)
print(type(score))
 
1.2
course_under=course.replace(" ","_")
print(course_under)
count_o=course.count('o')
print("字母o出现的次数:",count_o)
 
3.1
words = ["python","ai","machine learning","data","nlp"]
longest=words[0]
for w in words:
  if len(w)>len(longest):
     longest=w
print(f'最长的字符串是"{longest}",长度为{len(longest)}')

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

cHJpbnQ=

print