Python中如何判断一个字符串中有几个空格 python 里面怎么提取 空格分开的字符串
python\u8bed\u8a00\u4e2d\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u5b57\u7b26\u4e32\u6709\u591a\u5c11\u4f4d\u7528\u81ea\u5e26\u7684len\u51fd\u6570\u5c31\u884c\u4e86\uff0c\u6bd4\u5982
a = "hello"
print len(a)
\u7ed3\u679c\u5c31\u662f5
1\u3001\u501f\u52a9\u4e8elstrip()\u63d0\u53d6\u5de6\u8fb9\u7a7a\u683c
>>> s = ' A B C '
>>> s.lstrip() # \u53bb\u9664\u5b57\u6bcd\u5b57\u7b26\u4e32\u5de6\u8fb9\u7684\u7a7a\u683c
'A B C '
2\u3001\u501f\u52a9\u4e8erstrip()\u63d0\u53d6\u53f3\u8fb9\u7a7a\u683c
>>> s = " A B C "
>>> s.rstrip() # \u53bb\u9664\u5b57\u7b26\u4e32\u53f3\u8fb9\u7684\u7a7a\u683c
' A B C'
3\u3001\u501f\u52a9\u4e8estrip()\u63d0\u53d6\u5de6\u53f3\u4e24\u8fb9\u7684\u7a7a\u683c
>>> s = " A B C "
>>> s.strip() # \u53bb\u9664\u4e24\u8fb9\u7684\u7a7a\u683c
'A B C'
\u6269\u5c55\u8d44\u6599
python\u5bf9\u8c61\u7684\u5904\u7406\u65b9\u6cd5
\u5bf9\u8c61\u7684\u65b9\u6cd5\u662f\u6307\u7ed1\u5b9a\u5230\u5bf9\u8c61\u7684\u51fd\u6570\u3002\u8c03\u7528\u5bf9\u8c61\u65b9\u6cd5\u7684\u8bed\u6cd5\u662finstance.method(arguments)\u3002\u5b83\u7b49\u4ef7\u4e8e\u8c03\u7528Class.method(instance, arguments)\u3002
\u5f53\u5b9a\u4e49\u5bf9\u8c61\u65b9\u6cd5\u65f6\uff0c\u5fc5\u987b\u663e\u5f0f\u5730\u5b9a\u4e49\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0c\u4e00\u822c\u8be5\u53c2\u6570\u540d\u90fd\u4f7f\u7528self\uff0c\u7528\u4e8e\u8bbf\u95ee\u5bf9\u8c61\u7684\u5185\u90e8\u6570\u636e\u3002
\u8fd9\u91cc\u7684self\u76f8\u5f53\u4e8eC++, Java\u91cc\u9762\u7684this\u53d8\u91cf\uff0c\u4f46\u662f\u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528\u4efb\u4f55\u5176\u5b83\u5408\u6cd5\u7684\u53c2\u6570\u540d\uff0c\u6bd4\u5982this \u548c mine \u7b49\uff0cself\u4e0eC++,Java\u91cc\u9762\u7684this\u4e0d\u5b8c\u5168\u4e00\u6837\uff0c\u5b83\u53ef\u4ee5\u88ab\u770b\u4f5c\u662f\u4e00\u4e2a\u4e60\u60ef\u6027\u7684\u7528\u6cd5\uff0c\u6211\u4eec\u4f20\u5165\u4efb\u4f55\u5176\u5b83\u7684\u5408\u6cd5\u540d\u79f0\u90fd\u884c\u3002
\u53c2\u8003\u8d44\u6599
\u767e\u5ea6\u767e\u79d1-python
a='2014.11 2016.03 xxx'
print len(a) - len(a.replace(' ','')) ,'个空格'
#!/usr/bin/env python
# coding=utf-8
"""
Python中如何判断一个字符串中有几个空格
http://zhidao.baidu.com/question/138854675106454205.html
"""
from __future__ import (print_function, unicode_literals)
text = '2014.11 2016.03 xxx有限公司 （1年4个月）'
currentCharIsSpace = False
count = 0
for c in text:
if currentCharIsSpace:
if c.isspace():
count += 1
else:
currentCharIsSpace = False
print(" %s个空格" % (count,))
else:
if c.isspace():
count = 1
currentCharIsSpace = True
else:
print(c, end="")
if currentCharIsSpace:
currentCharIsSpace = False
print(" %s个空格" % (count,))
运行结果
2014.11 2个空格
016.03 2个空格
xx有限公司 2个空格
1年4个月）
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