str_1='wo shi yi zhi da da niu '
char_1='i'
nPos=str_1.index(char_1)
print(nPos)
运行结果:7
========是使用find==========
str_1='wo shi yi zhi da da niu '
char_1='i'
nPos=str_1.find(char_1)
print(nPos)
结果:5
========如何查找所有‘i’在字符串中位置呢?===========
#开挂模式
str_1='wo shi yi zhi da da niu '
char_1=str(input('Please input the Char you want:'))
count=0
str_list=list(str_1)
for each_char in str_list:
count+=1
if each_char==char_1:
print(each_char,count-1)
运行结果:
Please input the Char you want:i
i 0
i 1
i 2
i 3