无法搜索给定字符串中的特定子字符串

Question

str_search = "DD09"

str_1 = "DD09 High speed status"
Str_2 = "Dd09 High speed status"

str.find (str_search)
print(str)

输出：DD09高速状态

为什么无法打印Str_2？我如何克服这个问题？

Answer 1

在搜索前将两个字符串设为小写：

str_search = "DD09"

str_1 = "DD09 High speed status"
Str_2 = "Dd09 High speed status"

position = Str_2.lower().find(str_search.lower())
print(position)