请实现一个函数,把字符串中的每个空格替换成"%20"。例如输入“We are happy.”,则输出“We%20are%20happy.”。
# -*- coding:utf-8 -*-
"""
其实,Python的字符串是不可变
没有C++那种像字符串的问题,
但这也导致了,必然多出了空间上的消耗。
"""
def replaceSpace(strings):
return strings.replace(' ', '%20')
def my_replaceSpace(strings):
result = ''
for letter in strings:
if letter == ' ':
letter = '%20'
result += letter
return result
# def replaceSpace2(strings):
# pieces = strings.split()
# result = ''
# for piece in pieces:
# result += piece + '%20'
# result -= '%20' ## 不可行
if __name__ == '__main__':
assert replaceSpace('124322') == '124322'
assert replaceSpace('124 322') == '124%20322'
assert replaceSpace('123 4566 4356') == '123\%20\%204566\%204356'
assert replaceSpace(' 124322') == '%20124322'
assert replaceSpace('124322 ') == '124322%20'
assert replaceSpace('') == ''
assert replaceSpace(' ') == '124322%20'
assert replaceSpace(' ') == '\%20\%20\%20'
# 网站
# https://www.nowcoder.com/practice/4060ac7e3e404ad1a894ef3e17650423?tpId=13&tqId=11155&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking
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