#To Find the first occurance of a substring
def getIndex(string, sequence):
for i in range(len(string)):
if string[i] == sequence[0]:
try:
if string[i+1:(i+1+len(sequence)-1)] == sequence[1:]:
return i
else:
continue
except IndexError:
print('Array out of bounds substring doesnt exist')
else:
return 'not found'
print(getIndex('skyscrapper', 'erss'))
在上面的代码中
e类
出现在索引9上
字符串[i+1:(i+1+len(sequence)-1)]
相当于
是不是应该扔一个
因为索引12不存在于字符串中吗?
