if not None or not '': print('Not empty!') The first condition is if “not None”, which evaluates to True. The second condition is “or not ””, which also evaluates to True. Therefore, the entire expression
The Pythonlen()is used to get the total number of characters present in the string and check if the length of the string is 0 to identify the string is empty. Actually, thelen()function returns the length of an object. The object can be a string, a list, a tuple, or other objects ...
If you’ve used other programming languages, you may have learned that an empty object is not the same as an object that does not exist. In this lesson, you’ll learn how to check for None (or Null objects) in Python. foo =Noneiffoo is None: print("is None")iffoo ==None: print...
If you’ve used other programming languages, you may have learned that an empty object is not the same as an object that does not exist. In this lesson, you’ll learn how to check for None (or Null objects) in Python. foo = None if foo is None: print("is None") if foo == No...
Check if a String is Empty or Whitespace in Python Using the Equality Operator To check if a string is empty using the equality operator, we can just compare the string with another empty string. If the result is True, the input string is empty. Otherwise not. ...
def is_empty(variable): # Check for None if variable is None: return True # Check for empty strings, lists, tuples, dictionaries, and sets if isinstance(variable, (str, list, tuple, dict, set)): return not variable # Check for zero in integers elif isinstance(variable, int): return ...
= '{}'.format('dir') for file_tmp in root_elem.findall(mpath, namespaces): file_name = file_tmp.find("file-name", namespaces) elem = file_tmp.find("dir-name", namespaces) if elem is None or file_name is None: continue _, part2 = os.path.splitext(file_name.text) if part2...
我们经常做单元测试使用的机制 if __name__ == '__main__' ,表明作为主程序运行的Python 源文件可以被视为名为 __main__ 的 module,当然以 import py 方式加载,则__name__ 不会为 __main__。在初始化 __main__ module 时会将('__builtins__', __builtin__ module)插入到其 dict 中。也就...
Pandas type check # pandas之外怎么check # Ensure the input is either a pandas Series or DataFrame if not isinstance(input_data, (pd.Series, pd.DataFrame)): raise TypeError("Input should be a pandas Series or DataFrame") ### # pandas之内怎么check # df.index if df_...
json','Accept':'text/plain'}api="https://{ip}:{port}/editor/scan/templates".format(ip=ip,port=port)response=requests.get(api,headers=header,verify=False)templates=json.loads(response.text)['templates']fortemplateintemplates:iftemplate['name']==template_name:returntemplate['uuid']returnNone...