替换字符串空格

#替换字符串中的空格

'''输入：s = "We are happy."
输出："We%20are%20happy."'''

s = "We are happy."

#基础解法
def replaceStr(str):
    list = []
    for i in str:
        if i == " ":
            list.append("%20")
        else:
            list.append(i)
    return "".join(list)

print(replaceStr(s))

#快速解法
newstr = s.replace(" ", "%20")
print(newstr)