6.8--8:定义一个字符串str='abcdefghijklmnopqrstuvwxyz',

xiaoxiao2021-02-28  43

# 4,定义一个字符串str='abcdefghijklmnopqrstuvwxyz', # 在每个字符前面加上序号。比如‘1a2b3c.....26z’ print('first'.center(40,'=')) str1 = 'abcdefghijklmnopqrstuvwxyz' list1 = [] for i in range(len(str1)): connect = str(i+1)+str1[i] list1.append(connect) result = ''.join(list1) print(result) print('second'.center(40,'=')) str1 = 'abcdefghijklmnopqrstuvwxyz' list2 = [] for i,m in enumerate(str1): str2 = str(i+1)+m list2.append(str2) result = ''.join(list2) print(result) print('third'.center(40,'=')) str1 = 'abcdefghijklmnopqrstuvwxyz' for i in str1: result = str(str1.find(i) + 1) + i print(result, end='')

 

 

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