以下代码适用于空字符串,但不适用于空 unicode 字符串: class FooClass(): string = ... string = might_return_normal_empty_string_or_unicode_empty_string(string) # Works for normal empty strings, not unicode: if string is not None: print "string is not an empty string." 相反,我必须像这...
#myString is None OR myString is empty or blank return True 1. 2. 3. 4. 5. 6. 并且,与测试字符串是否不是None或NOR空或NOR空白完全相反: def isNotBlank (myString): if myString and myString.strip(): #myString is not None AND myString is not empty or blank return True #myString ...
If sep is not specified or is None, a different splitting algorithm is applied: runs of consecutive whitespace are regarded as a single separator, and the result will contain no empty strings at the start or end if the string has leading or trailing whitespace. Consequently, splitting an empty...
defnone_to_empty_string(value):return""ifvalueisNoneelsestr(value) 1. 2. 方法三:使用or运算符 Python中的or运算符可以返回第一个为真的值,我们可以利用这个特性来转换None。 defnone_to_empty_string(value):returnstr(value)ifvalueisnotNoneelse"" 1. 2. 以上三种方法都可以将None转换成空字符串,具...
4、None 三、基本类型-str 1、转义字符 2、字符串拼接 3、字符串复制 4、字符串下标、切片操作 5、字符串len和for循环 6、字符串in和not in 7、字符串相关函数 8、字符串isX系列方法 9、字符串start和end 10、字符串的拼接和拆分 11、字符串对齐操作 12、字符串空白删除操作 13、f-string格式化字符串 四...
(uriTmp, src_file_name, ',', file_dir) req_data = None ret, _, rsp_data = ops_conn.get(uri, req_data) if ops_return_result(ret) or rsp_data == '': return file_size else: root_elem = etree.fromstring(rsp_data) namespaces = {'file-operation': 'urn:huawei:yang:huawei-...
pdb.run("fun(1, 0)") # (1) > <string>(1)<module>()->None (Pdb) n ZeroDivisionError: division by zero > <string>(1)<module>()->None (Pdb) 说明函数中抛出了 ZeroDivisionError 异常。继续输入 n 直到调试结束,返回到 >>> 状态。 > <string>(1)<module>()->None (Pdb) n --Return...
Return a copy of the string where all tab characters are replaced by one or more spaces, depending on the current column and the given tab size. The column number is reset to zero after each newline occurring in the string. If tabsize is not given, a tab size of 8 characters is assu...
| delimiter string. If maxsplit is given, at most maxsplit | splits are done. If sep is not specified or is None, any | whitespace string is a separator and empty strings are | removed from the result. | | splitlines(...)
a nice string representation of the object. | If the argument is a string, the return value is the same object. | | Method resolution order: | str | basestring | object | | Methods defined here: | | __add__(...) | x.__add__(y) <==> x+y | | __contains__(...) | x...