正文
Python 2.7.9 Demo - 005.字符串判空
小程序：扫一扫查出行【扫一扫了解最新限行尾号】
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#coding=utf-8
#!/usr/bin/python str1 = None;
str2 = '';
str3 = ' '; if str1 == None :
print("str1 is none.");
else :
print("str1 is not none."); if str2 == None :
print("str2 is none.");
else :
print("str2 is not none."); if str2 == None or len(str2) == 0 :
print("str2 is none.");
else :
print("str2 is not none."); if str3 == None or len(str3.strip()) == 0 :
print("str3 is none.");
else :
print("str3 is not none.");
