Top "Nonetype" questions

Python None comparison: should I use "is" or ==?

My editor warns me when I compare my_var == None, but no warning when I use my_var is None. …

python comparison nonetype

Replace None with NaN in pandas dataframe

I have table x: website 0 http://www.google.com/ 1 http://www.yahoo.com 2 None I want to replace python None …

pandas dataframe replace nan nonetype

Why is this printing 'None' in the output?

I have defined a function as follows: def lyrics(): print "The very first line" print lyrics() However why does the …

python nonetype

None value in python dictionary

Is it possible to check none value in dict dict = {'a':'None','b':'12345','c':'None'} My code for …

python if-statement dictionary nonetype

Why does append() always return None in Python?

list = [1, 2, 3] print(list.append(4)) ## WRONG, print does not work, append() returns None ## RIGHT: list.append(4) print(list) ## [1, 2, 3, 4] I'm learning Python …

python list append nonetype

What's the correct Try Exception for NoneType when using regex's .groups() function

I'm trying to use the following code: try: clean = filter(None, re.match(r'^(\S+) (.*?) (\S+)$', full).groups()) except …

python exception python-2.7 nonetype try-except

Native Python function to remove NoneType elements from list?

I'm using Beautiful Soup in Python to scrape some data from HTML files. In some cases, Beautiful Soup returns lists …

python list nonetype

How to insert 'NULL' values into PostgreSQL database using Python?

Is there a good practice for entering NULL key values to a PostgreSQL database when a variable is None in …

python postgresql null psycopg2 nonetype

How can I append a None value to a list in Python?

I have a list : A = ['Yes'] I want to have A = ['Yes',None] How can I do this?

python list append nonetype

Python check for NoneType not working

I'm trying to check whether an object has a None type before checking it's length. For this, I've done an …

python if-statement nonetype