Python None To Empty String Coupon
PYTHON - MOST PYTHONIC WAY TO CONVERT NONE TO AN EMPTY LIST IN …
Dec 27, 2020 I want to write a general function that takes two input variables var1, var2 and returns the concatenation of both.. Each variable has the default value None, and can be either a single element or a list.. The expected output should be a list (even if both var1 and var2 are None, it should return an empty list []).. Below is my function: ...
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PYTHON | CONVERT NONE TO EMPTY STRING - GEEKSFORGEEKS
Jun 24, 2019 Python | Convert None to empty string manjeet_04 Read Discuss Courses Practice Video Sometimes, while working with Machine Learning, we can encounter None values and we wish to convert them to an empty string for data consistency. This and many other utilities can require a solution to this problem. ...
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Get CodeNULL - NONE VS EMPTY STRING IN PYTHON - STACK OVERFLOW
Dec 15, 2011 It is running under Python 2.7. The application is inconsistent in the way it uses None and "" to populate variables which do not have a value. I want to make this consistent and try to update the code to one way or the other. ...
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Get CodePYTHON - HOW TO REPLACE NONE ONLY WITH EMPTY STRING USING …
Jul 8, 2015 Since the relevant columns you wish to alter are all objects, you could just specify this with the dtype attribute (for completeness I added in string and unicode) and use fillna. So: for c in df: if str(df[c].dtype) in ('object', … ...
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Get CodePYTHON - HOW TO CHECK IF THE STRING IS EMPTY? - STACK OVERFLOW
Nov 1, 2019 Empty strings are "falsy" ( python 2 or python 3 reference), which means they are considered false in a Boolean context, so you can just do this: if not myString: This is the preferred way if you know that your variable is a string. If your variable could also be some other type then you should use: if myString == "": ...
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PYTHON LAMBDA RETURNING NONE INSTEAD OF EMPTY STRING
Apr 3, 2010 12. I have the following lambda function: f = lambda x: x == None and '' or x. It should return an empty string if it receives None as the argument, or the argument if it's not None. For example: >>> f (4) 4 >>> f (None) >>>. If I call f (None) instead of getting an empty string I get None. I printed the type of what the function returned and I ... ...
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Get CodePYTHON - CSV READER BEHAVIOR WITH NONE AND EMPTY STRING - STACK …
Jul 8, 2012 As mentioned above, this is a limitation of the csv module. A solution is just to rewrite the rows inside a loop with a simple dictionary comprehension, as follows: reader = csv.DictReader (csvfile) for row in reader: # Interpret empty values as None (instead of '') row = {k: v if v else None for k, v in row.items ()} : ...
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Get CodePYTHON - REPLACE NONE VALUE WITH EMPTY STRING - STACK OVERFLOW
Feb 15, 2019 3 Answers. You can use map function as below to call a method say "replace_none" for every key in the dictionary and replace None with "None". def replace_none (key): if d.get (key) is None: d [key] = "None" map (replace_none,d) import json dictionary = json.load (open ( "FILENAME HERE", 'r')) for k in dictionary: if dictionary … ...
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Get CodePYTHON - IF INPUT IS EMPTY THEN ASSIGN NONE - STACK OVERFLOW
Dec 5, 2021 1. If input is empty or zero it should get None. This is what has been attempted: The int is necessary. number = int (input ('Type an integer: ') or None ) number = number if number != 0 else None print (number) How to avoid this issue: TypeError: int () argument must be a string, a bytes-like object or a number, not 'NoneType'. ...
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PYTHON - EMPTY LIST IS EQUAL TO NONE OR NOT? - STACK OVERFLOW
None is the sole instance of the NoneType and is usually used to signify absence of value. What happens in your example is that the empty list, taken in boolean context, evaluates to False, the condition fails, so the else branch gets executed.The interpreter does something along the lines of: ...
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Get CodePYTHON - SHOULD I RETURN AN EMPTY DICT INSTEAD OF NONE? - STACK …
Jan 16, 2015 As others have said, an empty dict is falsy, so there's no problem there. But the idea of returning an empty dict leaves a bad taste in my mouth. I can't help but feel that returning an empty dict could hide errors that returning None would reveal. Still, it's … ...
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Get CodePYTHON - PYTHONIC WAY TO CONVERT THE STRING "NONE" TO A PROPER …
Mar 19, 2019 Pythonic way to convert the string "None" to a proper None. Ask Question Asked 8 years, 6 months ago. ... Where exactly is the string coming from, and why isn't it already just the None ... If, for example, you want to save Python data to a file and read it later, there may be better options than whatever it is you're trying to put together. ... ...
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Get CodePYTHON - BEST PRACTICE FOR DECLARING AN EMPTY VARIABLE - STACK …
Mar 23, 2018 2 Answers. Sorted by: 8. If you want to initialize a variable to an empty value, using an empty value literal will be slightly faster, since it avoids having to do a name lookup. That is, if you write: some_variable = str () Python first needs to make sure you haven't written something silly like. str = int. ...
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EMPTY STRING IN PYTHON? - STACK OVERFLOW
Mar 12, 2015 3. "" represents an empty string. So begin != "" is true whenever begin doesn't contain an empty string. The initial value None is not an empty string, so the loop will run at least once. After that, begin will contain whatever the user entered in … ...
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Get CodePYTHON - REPLACE NONE WITH EMPTY STRING IN NESTED DICTIONARY
Oct 7, 2020 I want to replace None with an empty string and store conversion of the dictionary into another variable like test1. The following code is not allowing me to store it in another variable. def replace_none (test_dict): # checking for dictionary and replacing if None if isinstance (test_dict, dict): for key in test_dict: if test_dict [key] is ... ...
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Get CodeHOW TO CONVERT NONE TO AN EMPTY STRING IN PYTHON
Oct 17, 2022 In Python, ‘None’ is a specific object indicating that the object is missing the presence of a value. The Python Null object is the singleton None. Note: constant ‘None’ is defined as False, so when combined using the same logical operator or always returns False. To convert none to an empty string, we have the following ways: Use lambda … ...
BEST WAY TO DO A "NOT NONE" TEST IN PYTHON FOR A NORMAL AND …
The following code works great for an empty string, but not an empty unicode string: 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." … ...
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PYTHON - MOST EFFICIENT WAY TO CONVERT EMPTY(ISH) STRINGS TO NULL ...
I have a pandas series that contains both empty strings and strings with nothing but whitespace. I want to convert these to a 'null' value (e.g. None). def empty_str_to_null(s): """Convert empty ...
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Get CodeSTRING - SELECT NON EMPTY ELEMENTS OF LIST IN PYTHON - STACK OVERFLOW
Nov 15, 2017 So the generator says: for each string in list, keep 'if string' - i.e. if the string is not empty. We then finally use the str.join method that will take each string in the iterator that is passed into it (here a generator) and concatenate them together with whatever the str is. So here we use a ',' as the string to get the desired result. ...
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Get CodeCHECK STRING "NONE" OR "NOT" IN PYTHON 2.7 - STACK OVERFLOW
Mar 12, 2016 Using Python 2.7 and foo is a string. @Signal: No they are not. if foo is not None only checks if foo is really not the singleton None while if foo checks if bool (foo) or if foo.__nonzero__ () which are completly different things. Whenever the len of a string is more than 0 bool (that_string) returns True. If the len of the string is 0 then it ... ...
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