一覧

Question

に含まれる文字の位置を探しますか？

はこれが何をしたいです：

1:0, 3:2, 6:4 
#1 for "&", 3 for "->", 6 for "X" inside expression variable. 
#0 for "&", 2 for "->", 4 for "X" inside operator List. 

Answer 1

operator = ["&", "/", "->", "<->", "X", "I"] 
expression = "p&q->rXq" 

resultString = '' 
for one_op in operator: # for each character in your list 
    startingIndex = expression.find(one_op) # important: assuming it appears only once, find() takes the first occurrence and returns the index 
    if startingIndex is not -1: # if find() does not find an occurence, it will return -1 
     resultString += (str(startingIndex) + ':' + str(operator.index(one_op)) + ',') # only that exist is considered 

print(resultString.rstrip(',')) 

出力：

1:0,3:2,6:4 

Answer 2

operator = ["&", "/", "->", "<->", "X", "I"] 
expression = "p&q->rXq" 
print(operator.index("<->")) 

これは、出力が表示されます：私はこのような出力に何か必要ですか？